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# encoding: utf-8
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"""Word completion for IPython.
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This module is a fork of the rlcompleter module in the Python standard
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library. The original enhancements made to rlcompleter have been sent
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upstream and were accepted as of Python 2.3, but we need a lot more
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functionality specific to IPython, so this module will continue to live as an
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IPython-specific utility.
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Original rlcompleter documentation:
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This requires the latest extension to the readline module (the
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completes keywords, built-ins and globals in __main__; when completing
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NAME.NAME..., it evaluates (!) the expression up to the last dot and
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completes its attributes.
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It's very cool to do "import string" type "string.", hit the
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completion key (twice), and see the list of names defined by the
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string module!
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Tip: to use the tab key as the completion key, call
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readline.parse_and_bind("tab: complete")
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Notes:
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- Exceptions raised by the completer function are *ignored* (and
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generally cause the completion to fail). This is a feature -- since
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readline sets the tty device in raw (or cbreak) mode, printing a
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traceback wouldn't work well without some complicated hoopla to save,
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reset and restore the tty state.
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- The evaluation of the NAME.NAME... form may cause arbitrary
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application defined code to be executed if an object with a
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``__getattr__`` hook is found. Since it is the responsibility of the
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application (or the user) to enable this feature, I consider this an
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acceptable risk. More complicated expressions (e.g. function calls or
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indexing operations) are *not* evaluated.
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- GNU readline is also used by the built-in functions input() and
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raw_input(), and thus these also benefit/suffer from the completer
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features. Clearly an interactive application can benefit by
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specifying its own completer function and using raw_input() for all
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its input.
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- When the original stdin is not a tty device, GNU readline is never
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used, and this module (and the readline module) are silently inactive.
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"""
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# Copyright (c) IPython Development Team.
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# Distributed under the terms of the Modified BSD License.
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#
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# Some of this code originated from rlcompleter in the Python standard library
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# Copyright (C) 2001 Python Software Foundation, www.python.org
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import __main__
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import glob
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import inspect
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import itertools
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import keyword
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import os
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import re
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import sys
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import unicodedata
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import string
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from traitlets.config.configurable import Configurable
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from IPython.core.error import TryNext
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from IPython.core.inputsplitter import ESC_MAGIC
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from IPython.core.latex_symbols import latex_symbols, reverse_latex_symbol
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from IPython.utils import generics
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from IPython.utils import io
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from IPython.utils.decorators import undoc
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from IPython.utils.dir2 import dir2
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from IPython.utils.process import arg_split
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from IPython.utils.py3compat import builtin_mod, string_types, PY3
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from traitlets import CBool, Enum
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#-----------------------------------------------------------------------------
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# Globals
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#-----------------------------------------------------------------------------
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# Public API
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__all__ = ['Completer','IPCompleter']
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if sys.platform == 'win32':
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PROTECTABLES = ' '
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else:
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PROTECTABLES = ' ()[]{}?=\\|;:\'#*"^&'
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#-----------------------------------------------------------------------------
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# Main functions and classes
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#-----------------------------------------------------------------------------
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def has_open_quotes(s):
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"""Return whether a string has open quotes.
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This simply counts whether the number of quote characters of either type in
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the string is odd.
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Returns
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-------
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If there is an open quote, the quote character is returned. Else, return
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False.
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"""
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# We check " first, then ', so complex cases with nested quotes will get
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# the " to take precedence.
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if s.count('"') % 2:
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return '"'
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elif s.count("'") % 2:
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return "'"
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else:
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return False
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def protect_filename(s):
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"""Escape a string to protect certain characters."""
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return "".join([(ch in PROTECTABLES and '\\' + ch or ch)
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for ch in s])
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def expand_user(path):
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"""Expand '~'-style usernames in strings.
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This is similar to :func:`os.path.expanduser`, but it computes and returns
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extra information that will be useful if the input was being used in
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computing completions, and you wish to return the completions with the
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original '~' instead of its expanded value.
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Parameters
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----------
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path : str
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String to be expanded. If no ~ is present, the output is the same as the
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input.
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Returns
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-------
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newpath : str
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Result of ~ expansion in the input path.
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tilde_expand : bool
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Whether any expansion was performed or not.
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tilde_val : str
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The value that ~ was replaced with.
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"""
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# Default values
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tilde_expand = False
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tilde_val = ''
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newpath = path
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if path.startswith('~'):
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tilde_expand = True
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rest = len(path)-1
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newpath = os.path.expanduser(path)
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if rest:
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tilde_val = newpath[:-rest]
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else:
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tilde_val = newpath
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return newpath, tilde_expand, tilde_val
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def compress_user(path, tilde_expand, tilde_val):
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"""Does the opposite of expand_user, with its outputs.
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"""
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if tilde_expand:
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return path.replace(tilde_val, '~')
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else:
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return path
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def penalize_magics_key(word):
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"""key for sorting that penalizes magic commands in the ordering
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Normal words are left alone.
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Magic commands have the initial % moved to the end, e.g.
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%matplotlib is transformed as follows:
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%matplotlib -> matplotlib%
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[The choice of the final % is arbitrary.]
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Since "matplotlib" < "matplotlib%" as strings,
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"timeit" will appear before the magic "%timeit" in the ordering
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For consistency, move "%%" to the end, so cell magics appear *after*
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line magics with the same name.
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A check is performed that there are no other "%" in the string;
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if there are, then the string is not a magic command and is left unchanged.
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"""
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# Move any % signs from start to end of the key
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# provided there are no others elsewhere in the string
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if word[:2] == "%%":
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if not "%" in word[2:]:
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return word[2:] + "%%"
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if word[:1] == "%":
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if not "%" in word[1:]:
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return word[1:] + "%"
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return word
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@undoc
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class Bunch(object): pass
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DELIMS = ' \t\n`!@#$^&*()=+[{]}\\|;:\'",<>?'
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GREEDY_DELIMS = ' =\r\n'
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class CompletionSplitter(object):
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"""An object to split an input line in a manner similar to readline.
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By having our own implementation, we can expose readline-like completion in
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a uniform manner to all frontends. This object only needs to be given the
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line of text to be split and the cursor position on said line, and it
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returns the 'word' to be completed on at the cursor after splitting the
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entire line.
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What characters are used as splitting delimiters can be controlled by
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setting the `delims` attribute (this is a property that internally
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automatically builds the necessary regular expression)"""
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# Private interface
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# A string of delimiter characters. The default value makes sense for
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# IPython's most typical usage patterns.
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_delims = DELIMS
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# The expression (a normal string) to be compiled into a regular expression
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# for actual splitting. We store it as an attribute mostly for ease of
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# debugging, since this type of code can be so tricky to debug.
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_delim_expr = None
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# The regular expression that does the actual splitting
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_delim_re = None
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def __init__(self, delims=None):
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delims = CompletionSplitter._delims if delims is None else delims
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self.delims = delims
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@property
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def delims(self):
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"""Return the string of delimiter characters."""
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return self._delims
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@delims.setter
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def delims(self, delims):
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"""Set the delimiters for line splitting."""
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expr = '[' + ''.join('\\'+ c for c in delims) + ']'
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self._delim_re = re.compile(expr)
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self._delims = delims
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self._delim_expr = expr
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def split_line(self, line, cursor_pos=None):
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"""Split a line of text with a cursor at the given position.
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"""
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l = line if cursor_pos is None else line[:cursor_pos]
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return self._delim_re.split(l)[-1]
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class Completer(Configurable):
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greedy = CBool(False, config=True,
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help="""Activate greedy completion
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This will enable completion on elements of lists, results of function calls, etc.,
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but can be unsafe because the code is actually evaluated on TAB.
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"""
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)
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def __init__(self, namespace=None, global_namespace=None, **kwargs):
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"""Create a new completer for the command line.
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Completer(namespace=ns,global_namespace=ns2) -> completer instance.
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If unspecified, the default namespace where completions are performed
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is __main__ (technically, __main__.__dict__). Namespaces should be
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given as dictionaries.
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An optional second namespace can be given. This allows the completer
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to handle cases where both the local and global scopes need to be
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distinguished.
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Completer instances should be used as the completion mechanism of
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readline via the set_completer() call:
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readline.set_completer(Completer(my_namespace).complete)
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"""
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# Don't bind to namespace quite yet, but flag whether the user wants a
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# specific namespace or to use __main__.__dict__. This will allow us
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# to bind to __main__.__dict__ at completion time, not now.
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if namespace is None:
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self.use_main_ns = 1
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else:
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self.use_main_ns = 0
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self.namespace = namespace
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# The global namespace, if given, can be bound directly
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if global_namespace is None:
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self.global_namespace = {}
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else:
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self.global_namespace = global_namespace
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super(Completer, self).__init__(**kwargs)
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def complete(self, text, state):
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"""Return the next possible completion for 'text'.
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This is called successively with state == 0, 1, 2, ... until it
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returns None. The completion should begin with 'text'.
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"""
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if self.use_main_ns:
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self.namespace = __main__.__dict__
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if state == 0:
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if "." in text:
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self.matches = self.attr_matches(text)
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else:
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self.matches = self.global_matches(text)
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try:
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return self.matches[state]
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except IndexError:
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return None
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def global_matches(self, text):
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"""Compute matches when text is a simple name.
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Return a list of all keywords, built-in functions and names currently
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defined in self.namespace or self.global_namespace that match.
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"""
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#print 'Completer->global_matches, txt=%r' % text # dbg
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matches = []
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match_append = matches.append
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n = len(text)
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for lst in [keyword.kwlist,
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builtin_mod.__dict__.keys(),
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self.namespace.keys(),
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self.global_namespace.keys()]:
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for word in lst:
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if word[:n] == text and word != "__builtins__":
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match_append(word)
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return matches
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def attr_matches(self, text):
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"""Compute matches when text contains a dot.
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Assuming the text is of the form NAME.NAME....[NAME], and is
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evaluatable in self.namespace or self.global_namespace, it will be
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evaluated and its attributes (as revealed by dir()) are used as
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possible completions. (For class instances, class members are are
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also considered.)
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WARNING: this can still invoke arbitrary C code, if an object
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with a __getattr__ hook is evaluated.
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"""
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#io.rprint('Completer->attr_matches, txt=%r' % text) # dbg
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# Another option, seems to work great. Catches things like ''.<tab>
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m = re.match(r"(\S+(\.\w+)*)\.(\w*)$", text)
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if m:
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expr, attr = m.group(1, 3)
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elif self.greedy:
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m2 = re.match(r"(.+)\.(\w*)$", self.line_buffer)
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if not m2:
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return []
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expr, attr = m2.group(1,2)
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else:
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return []
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try:
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obj = eval(expr, self.namespace)
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except:
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try:
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obj = eval(expr, self.global_namespace)
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except:
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return []
|
|
|
|
|
|
if self.limit_to__all__ and hasattr(obj, '__all__'):
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words = get__all__entries(obj)
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|
else:
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words = dir2(obj)
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|
try:
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|
words = generics.complete_object(obj, words)
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|
except TryNext:
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|
pass
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|
|
except Exception:
|
|
|
# Silence errors from completion function
|
|
|
#raise # dbg
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|
pass
|
|
|
# Build match list to return
|
|
|
n = len(attr)
|
|
|
res = ["%s.%s" % (expr, w) for w in words if w[:n] == attr ]
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|
return res
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|
|
|
|
|
|
def get__all__entries(obj):
|
|
|
"""returns the strings in the __all__ attribute"""
|
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|
try:
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|
words = getattr(obj, '__all__')
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except:
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return []
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|
|
|
|
|
return [w for w in words if isinstance(w, string_types)]
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|
|
|
|
|
|
def match_dict_keys(keys, prefix, delims):
|
|
|
"""Used by dict_key_matches, matching the prefix to a list of keys"""
|
|
|
if not prefix:
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|
|
return None, 0, [repr(k) for k in keys
|
|
|
if isinstance(k, (string_types, bytes))]
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|
|
quote_match = re.search('["\']', prefix)
|
|
|
quote = quote_match.group()
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|
|
try:
|
|
|
prefix_str = eval(prefix + quote, {})
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|
|
except Exception:
|
|
|
return None, 0, []
|
|
|
|
|
|
pattern = '[^' + ''.join('\\' + c for c in delims) + ']*$'
|
|
|
token_match = re.search(pattern, prefix, re.UNICODE)
|
|
|
token_start = token_match.start()
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|
|
token_prefix = token_match.group()
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|
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|
|
|
# TODO: support bytes in Py3k
|
|
|
matched = []
|
|
|
for key in keys:
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|
|
try:
|
|
|
if not key.startswith(prefix_str):
|
|
|
continue
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|
|
except (AttributeError, TypeError, UnicodeError):
|
|
|
# Python 3+ TypeError on b'a'.startswith('a') or vice-versa
|
|
|
continue
|
|
|
|
|
|
# reformat remainder of key to begin with prefix
|
|
|
rem = key[len(prefix_str):]
|
|
|
# force repr wrapped in '
|
|
|
rem_repr = repr(rem + '"')
|
|
|
if rem_repr.startswith('u') and prefix[0] not in 'uU':
|
|
|
# Found key is unicode, but prefix is Py2 string.
|
|
|
# Therefore attempt to interpret key as string.
|
|
|
try:
|
|
|
rem_repr = repr(rem.encode('ascii') + '"')
|
|
|
except UnicodeEncodeError:
|
|
|
continue
|
|
|
|
|
|
rem_repr = rem_repr[1 + rem_repr.index("'"):-2]
|
|
|
if quote == '"':
|
|
|
# The entered prefix is quoted with ",
|
|
|
# but the match is quoted with '.
|
|
|
# A contained " hence needs escaping for comparison:
|
|
|
rem_repr = rem_repr.replace('"', '\\"')
|
|
|
|
|
|
# then reinsert prefix from start of token
|
|
|
matched.append('%s%s' % (token_prefix, rem_repr))
|
|
|
return quote, token_start, matched
|
|
|
|
|
|
|
|
|
def _safe_isinstance(obj, module, class_name):
|
|
|
"""Checks if obj is an instance of module.class_name if loaded
|
|
|
"""
|
|
|
return (module in sys.modules and
|
|
|
isinstance(obj, getattr(__import__(module), class_name)))
|
|
|
|
|
|
|
|
|
|
|
|
def back_unicode_name_matches(text):
|
|
|
u"""Match unicode characters back to unicode name
|
|
|
|
|
|
This does ☃ -> \\snowman
|
|
|
|
|
|
Note that snowman is not a valid python3 combining character but will be expanded.
|
|
|
Though it will not recombine back to the snowman character by the completion machinery.
|
|
|
|
|
|
This will not either back-complete standard sequences like \n, \b ...
|
|
|
|
|
|
Used on Python 3 only.
|
|
|
"""
|
|
|
if len(text)<2:
|
|
|
return u'', ()
|
|
|
maybe_slash = text[-2]
|
|
|
if maybe_slash != '\\':
|
|
|
return u'', ()
|
|
|
|
|
|
char = text[-1]
|
|
|
# no expand on quote for completion in strings.
|
|
|
# nor backcomplete standard ascii keys
|
|
|
if char in string.ascii_letters or char in ['"',"'"]:
|
|
|
return u'', ()
|
|
|
try :
|
|
|
unic = unicodedata.name(char)
|
|
|
return '\\'+char,['\\'+unic]
|
|
|
except KeyError as e:
|
|
|
pass
|
|
|
return u'', ()
|
|
|
|
|
|
def back_latex_name_matches(text):
|
|
|
u"""Match latex characters back to unicode name
|
|
|
|
|
|
This does ->\\sqrt
|
|
|
|
|
|
Used on Python 3 only.
|
|
|
"""
|
|
|
if len(text)<2:
|
|
|
return u'', ()
|
|
|
maybe_slash = text[-2]
|
|
|
if maybe_slash != '\\':
|
|
|
return u'', ()
|
|
|
|
|
|
|
|
|
char = text[-1]
|
|
|
# no expand on quote for completion in strings.
|
|
|
# nor backcomplete standard ascii keys
|
|
|
if char in string.ascii_letters or char in ['"',"'"]:
|
|
|
return u'', ()
|
|
|
try :
|
|
|
latex = reverse_latex_symbol[char]
|
|
|
# '\\' replace the \ as well
|
|
|
return '\\'+char,[latex]
|
|
|
except KeyError as e:
|
|
|
pass
|
|
|
return u'', ()
|
|
|
|
|
|
|
|
|
class IPCompleter(Completer):
|
|
|
"""Extension of the completer class with IPython-specific features"""
|
|
|
|
|
|
def _greedy_changed(self, name, old, new):
|
|
|
"""update the splitter and readline delims when greedy is changed"""
|
|
|
if new:
|
|
|
self.splitter.delims = GREEDY_DELIMS
|
|
|
else:
|
|
|
self.splitter.delims = DELIMS
|
|
|
|
|
|
if self.readline:
|
|
|
self.readline.set_completer_delims(self.splitter.delims)
|
|
|
|
|
|
merge_completions = CBool(True, config=True,
|
|
|
help="""Whether to merge completion results into a single list
|
|
|
|
|
|
If False, only the completion results from the first non-empty
|
|
|
completer will be returned.
|
|
|
"""
|
|
|
)
|
|
|
omit__names = Enum((0,1,2), default_value=2, config=True,
|
|
|
help="""Instruct the completer to omit private method names
|
|
|
|
|
|
Specifically, when completing on ``object.<tab>``.
|
|
|
|
|
|
When 2 [default]: all names that start with '_' will be excluded.
|
|
|
|
|
|
When 1: all 'magic' names (``__foo__``) will be excluded.
|
|
|
|
|
|
When 0: nothing will be excluded.
|
|
|
"""
|
|
|
)
|
|
|
limit_to__all__ = CBool(default_value=False, config=True,
|
|
|
help="""Instruct the completer to use __all__ for the completion
|
|
|
|
|
|
Specifically, when completing on ``object.<tab>``.
|
|
|
|
|
|
When True: only those names in obj.__all__ will be included.
|
|
|
|
|
|
When False [default]: the __all__ attribute is ignored
|
|
|
"""
|
|
|
)
|
|
|
|
|
|
def __init__(self, shell=None, namespace=None, global_namespace=None,
|
|
|
use_readline=True, config=None, **kwargs):
|
|
|
"""IPCompleter() -> completer
|
|
|
|
|
|
Return a completer object suitable for use by the readline library
|
|
|
via readline.set_completer().
|
|
|
|
|
|
Inputs:
|
|
|
|
|
|
- shell: a pointer to the ipython shell itself. This is needed
|
|
|
because this completer knows about magic functions, and those can
|
|
|
only be accessed via the ipython instance.
|
|
|
|
|
|
- namespace: an optional dict where completions are performed.
|
|
|
|
|
|
- global_namespace: secondary optional dict for completions, to
|
|
|
handle cases (such as IPython embedded inside functions) where
|
|
|
both Python scopes are visible.
|
|
|
|
|
|
use_readline : bool, optional
|
|
|
If true, use the readline library. This completer can still function
|
|
|
without readline, though in that case callers must provide some extra
|
|
|
information on each call about the current line."""
|
|
|
|
|
|
self.magic_escape = ESC_MAGIC
|
|
|
self.splitter = CompletionSplitter()
|
|
|
|
|
|
# Readline configuration, only used by the rlcompleter method.
|
|
|
if use_readline:
|
|
|
# We store the right version of readline so that later code
|
|
|
import IPython.utils.rlineimpl as readline
|
|
|
self.readline = readline
|
|
|
else:
|
|
|
self.readline = None
|
|
|
|
|
|
# _greedy_changed() depends on splitter and readline being defined:
|
|
|
Completer.__init__(self, namespace=namespace, global_namespace=global_namespace,
|
|
|
config=config, **kwargs)
|
|
|
|
|
|
# List where completion matches will be stored
|
|
|
self.matches = []
|
|
|
self.shell = shell
|
|
|
# Regexp to split filenames with spaces in them
|
|
|
self.space_name_re = re.compile(r'([^\\] )')
|
|
|
# Hold a local ref. to glob.glob for speed
|
|
|
self.glob = glob.glob
|
|
|
|
|
|
# Determine if we are running on 'dumb' terminals, like (X)Emacs
|
|
|
# buffers, to avoid completion problems.
|
|
|
term = os.environ.get('TERM','xterm')
|
|
|
self.dumb_terminal = term in ['dumb','emacs']
|
|
|
|
|
|
# Special handling of backslashes needed in win32 platforms
|
|
|
if sys.platform == "win32":
|
|
|
self.clean_glob = self._clean_glob_win32
|
|
|
else:
|
|
|
self.clean_glob = self._clean_glob
|
|
|
|
|
|
#regexp to parse docstring for function signature
|
|
|
self.docstring_sig_re = re.compile(r'^[\w|\s.]+\(([^)]*)\).*')
|
|
|
self.docstring_kwd_re = re.compile(r'[\s|\[]*(\w+)(?:\s*=\s*.*)')
|
|
|
#use this if positional argument name is also needed
|
|
|
#= re.compile(r'[\s|\[]*(\w+)(?:\s*=?\s*.*)')
|
|
|
|
|
|
# All active matcher routines for completion
|
|
|
self.matchers = [self.python_matches,
|
|
|
self.file_matches,
|
|
|
self.magic_matches,
|
|
|
self.python_func_kw_matches,
|
|
|
self.dict_key_matches,
|
|
|
]
|
|
|
|
|
|
def all_completions(self, text):
|
|
|
"""
|
|
|
Wrapper around the complete method for the benefit of emacs
|
|
|
and pydb.
|
|
|
"""
|
|
|
return self.complete(text)[1]
|
|
|
|
|
|
def _clean_glob(self,text):
|
|
|
return self.glob("%s*" % text)
|
|
|
|
|
|
def _clean_glob_win32(self,text):
|
|
|
return [f.replace("\\","/")
|
|
|
for f in self.glob("%s*" % text)]
|
|
|
|
|
|
def file_matches(self, text):
|
|
|
"""Match filenames, expanding ~USER type strings.
|
|
|
|
|
|
Most of the seemingly convoluted logic in this completer is an
|
|
|
attempt to handle filenames with spaces in them. And yet it's not
|
|
|
quite perfect, because Python's readline doesn't expose all of the
|
|
|
GNU readline details needed for this to be done correctly.
|
|
|
|
|
|
For a filename with a space in it, the printed completions will be
|
|
|
only the parts after what's already been typed (instead of the
|
|
|
full completions, as is normally done). I don't think with the
|
|
|
current (as of Python 2.3) Python readline it's possible to do
|
|
|
better."""
|
|
|
|
|
|
#io.rprint('Completer->file_matches: <%r>' % text) # dbg
|
|
|
|
|
|
# chars that require escaping with backslash - i.e. chars
|
|
|
# that readline treats incorrectly as delimiters, but we
|
|
|
# don't want to treat as delimiters in filename matching
|
|
|
# when escaped with backslash
|
|
|
if text.startswith('!'):
|
|
|
text = text[1:]
|
|
|
text_prefix = '!'
|
|
|
else:
|
|
|
text_prefix = ''
|
|
|
|
|
|
text_until_cursor = self.text_until_cursor
|
|
|
# track strings with open quotes
|
|
|
open_quotes = has_open_quotes(text_until_cursor)
|
|
|
|
|
|
if '(' in text_until_cursor or '[' in text_until_cursor:
|
|
|
lsplit = text
|
|
|
else:
|
|
|
try:
|
|
|
# arg_split ~ shlex.split, but with unicode bugs fixed by us
|
|
|
lsplit = arg_split(text_until_cursor)[-1]
|
|
|
except ValueError:
|
|
|
# typically an unmatched ", or backslash without escaped char.
|
|
|
if open_quotes:
|
|
|
lsplit = text_until_cursor.split(open_quotes)[-1]
|
|
|
else:
|
|
|
return []
|
|
|
except IndexError:
|
|
|
# tab pressed on empty line
|
|
|
lsplit = ""
|
|
|
|
|
|
if not open_quotes and lsplit != protect_filename(lsplit):
|
|
|
# if protectables are found, do matching on the whole escaped name
|
|
|
has_protectables = True
|
|
|
text0,text = text,lsplit
|
|
|
else:
|
|
|
has_protectables = False
|
|
|
text = os.path.expanduser(text)
|
|
|
|
|
|
if text == "":
|
|
|
return [text_prefix + protect_filename(f) for f in self.glob("*")]
|
|
|
|
|
|
# Compute the matches from the filesystem
|
|
|
m0 = self.clean_glob(text.replace('\\',''))
|
|
|
|
|
|
if has_protectables:
|
|
|
# If we had protectables, we need to revert our changes to the
|
|
|
# beginning of filename so that we don't double-write the part
|
|
|
# of the filename we have so far
|
|
|
len_lsplit = len(lsplit)
|
|
|
matches = [text_prefix + text0 +
|
|
|
protect_filename(f[len_lsplit:]) for f in m0]
|
|
|
else:
|
|
|
if open_quotes:
|
|
|
# if we have a string with an open quote, we don't need to
|
|
|
# protect the names at all (and we _shouldn't_, as it
|
|
|
# would cause bugs when the filesystem call is made).
|
|
|
matches = m0
|
|
|
else:
|
|
|
matches = [text_prefix +
|
|
|
protect_filename(f) for f in m0]
|
|
|
|
|
|
#io.rprint('mm', matches) # dbg
|
|
|
|
|
|
# Mark directories in input list by appending '/' to their names.
|
|
|
matches = [x+'/' if os.path.isdir(x) else x for x in matches]
|
|
|
return matches
|
|
|
|
|
|
def magic_matches(self, text):
|
|
|
"""Match magics"""
|
|
|
#print 'Completer->magic_matches:',text,'lb',self.text_until_cursor # dbg
|
|
|
# Get all shell magics now rather than statically, so magics loaded at
|
|
|
# runtime show up too.
|
|
|
lsm = self.shell.magics_manager.lsmagic()
|
|
|
line_magics = lsm['line']
|
|
|
cell_magics = lsm['cell']
|
|
|
pre = self.magic_escape
|
|
|
pre2 = pre+pre
|
|
|
|
|
|
# Completion logic:
|
|
|
# - user gives %%: only do cell magics
|
|
|
# - user gives %: do both line and cell magics
|
|
|
# - no prefix: do both
|
|
|
# In other words, line magics are skipped if the user gives %% explicitly
|
|
|
bare_text = text.lstrip(pre)
|
|
|
comp = [ pre2+m for m in cell_magics if m.startswith(bare_text)]
|
|
|
if not text.startswith(pre2):
|
|
|
comp += [ pre+m for m in line_magics if m.startswith(bare_text)]
|
|
|
return comp
|
|
|
|
|
|
def python_matches(self,text):
|
|
|
"""Match attributes or global python names"""
|
|
|
|
|
|
#io.rprint('Completer->python_matches, txt=%r' % text) # dbg
|
|
|
if "." in text:
|
|
|
try:
|
|
|
matches = self.attr_matches(text)
|
|
|
if text.endswith('.') and self.omit__names:
|
|
|
if self.omit__names == 1:
|
|
|
# true if txt is _not_ a __ name, false otherwise:
|
|
|
no__name = (lambda txt:
|
|
|
re.match(r'.*\.__.*?__',txt) is None)
|
|
|
else:
|
|
|
# true if txt is _not_ a _ name, false otherwise:
|
|
|
no__name = (lambda txt:
|
|
|
re.match(r'\._.*?',txt[txt.rindex('.'):]) is None)
|
|
|
matches = filter(no__name, matches)
|
|
|
except NameError:
|
|
|
# catches <undefined attributes>.<tab>
|
|
|
matches = []
|
|
|
else:
|
|
|
matches = self.global_matches(text)
|
|
|
|
|
|
return matches
|
|
|
|
|
|
def _default_arguments_from_docstring(self, doc):
|
|
|
"""Parse the first line of docstring for call signature.
|
|
|
|
|
|
Docstring should be of the form 'min(iterable[, key=func])\n'.
|
|
|
It can also parse cython docstring of the form
|
|
|
'Minuit.migrad(self, int ncall=10000, resume=True, int nsplit=1)'.
|
|
|
"""
|
|
|
if doc is None:
|
|
|
return []
|
|
|
|
|
|
#care only the firstline
|
|
|
line = doc.lstrip().splitlines()[0]
|
|
|
|
|
|
#p = re.compile(r'^[\w|\s.]+\(([^)]*)\).*')
|
|
|
#'min(iterable[, key=func])\n' -> 'iterable[, key=func]'
|
|
|
sig = self.docstring_sig_re.search(line)
|
|
|
if sig is None:
|
|
|
return []
|
|
|
# iterable[, key=func]' -> ['iterable[' ,' key=func]']
|
|
|
sig = sig.groups()[0].split(',')
|
|
|
ret = []
|
|
|
for s in sig:
|
|
|
#re.compile(r'[\s|\[]*(\w+)(?:\s*=\s*.*)')
|
|
|
ret += self.docstring_kwd_re.findall(s)
|
|
|
return ret
|
|
|
|
|
|
def _default_arguments(self, obj):
|
|
|
"""Return the list of default arguments of obj if it is callable,
|
|
|
or empty list otherwise."""
|
|
|
call_obj = obj
|
|
|
ret = []
|
|
|
if inspect.isbuiltin(obj):
|
|
|
pass
|
|
|
elif not (inspect.isfunction(obj) or inspect.ismethod(obj)):
|
|
|
if inspect.isclass(obj):
|
|
|
#for cython embededsignature=True the constructor docstring
|
|
|
#belongs to the object itself not __init__
|
|
|
ret += self._default_arguments_from_docstring(
|
|
|
getattr(obj, '__doc__', ''))
|
|
|
# for classes, check for __init__,__new__
|
|
|
call_obj = (getattr(obj, '__init__', None) or
|
|
|
getattr(obj, '__new__', None))
|
|
|
# for all others, check if they are __call__able
|
|
|
elif hasattr(obj, '__call__'):
|
|
|
call_obj = obj.__call__
|
|
|
|
|
|
ret += self._default_arguments_from_docstring(
|
|
|
getattr(call_obj, '__doc__', ''))
|
|
|
|
|
|
try:
|
|
|
args,_,_1,defaults = inspect.getargspec(call_obj)
|
|
|
if defaults:
|
|
|
ret+=args[-len(defaults):]
|
|
|
except TypeError:
|
|
|
pass
|
|
|
|
|
|
return list(set(ret))
|
|
|
|
|
|
def python_func_kw_matches(self,text):
|
|
|
"""Match named parameters (kwargs) of the last open function"""
|
|
|
|
|
|
if "." in text: # a parameter cannot be dotted
|
|
|
return []
|
|
|
try: regexp = self.__funcParamsRegex
|
|
|
except AttributeError:
|
|
|
regexp = self.__funcParamsRegex = re.compile(r'''
|
|
|
'.*?(?<!\\)' | # single quoted strings or
|
|
|
".*?(?<!\\)" | # double quoted strings or
|
|
|
\w+ | # identifier
|
|
|
\S # other characters
|
|
|
''', re.VERBOSE | re.DOTALL)
|
|
|
# 1. find the nearest identifier that comes before an unclosed
|
|
|
# parenthesis before the cursor
|
|
|
# e.g. for "foo (1+bar(x), pa<cursor>,a=1)", the candidate is "foo"
|
|
|
tokens = regexp.findall(self.text_until_cursor)
|
|
|
tokens.reverse()
|
|
|
iterTokens = iter(tokens); openPar = 0
|
|
|
|
|
|
for token in iterTokens:
|
|
|
if token == ')':
|
|
|
openPar -= 1
|
|
|
elif token == '(':
|
|
|
openPar += 1
|
|
|
if openPar > 0:
|
|
|
# found the last unclosed parenthesis
|
|
|
break
|
|
|
else:
|
|
|
return []
|
|
|
# 2. Concatenate dotted names ("foo.bar" for "foo.bar(x, pa" )
|
|
|
ids = []
|
|
|
isId = re.compile(r'\w+$').match
|
|
|
|
|
|
while True:
|
|
|
try:
|
|
|
ids.append(next(iterTokens))
|
|
|
if not isId(ids[-1]):
|
|
|
ids.pop(); break
|
|
|
if not next(iterTokens) == '.':
|
|
|
break
|
|
|
except StopIteration:
|
|
|
break
|
|
|
# lookup the candidate callable matches either using global_matches
|
|
|
# or attr_matches for dotted names
|
|
|
if len(ids) == 1:
|
|
|
callableMatches = self.global_matches(ids[0])
|
|
|
else:
|
|
|
callableMatches = self.attr_matches('.'.join(ids[::-1]))
|
|
|
argMatches = []
|
|
|
for callableMatch in callableMatches:
|
|
|
try:
|
|
|
namedArgs = self._default_arguments(eval(callableMatch,
|
|
|
self.namespace))
|
|
|
except:
|
|
|
continue
|
|
|
|
|
|
for namedArg in namedArgs:
|
|
|
if namedArg.startswith(text):
|
|
|
argMatches.append("%s=" %namedArg)
|
|
|
return argMatches
|
|
|
|
|
|
def dict_key_matches(self, text):
|
|
|
"Match string keys in a dictionary, after e.g. 'foo[' "
|
|
|
def get_keys(obj):
|
|
|
# Only allow completion for known in-memory dict-like types
|
|
|
if isinstance(obj, dict) or\
|
|
|
_safe_isinstance(obj, 'pandas', 'DataFrame'):
|
|
|
try:
|
|
|
return list(obj.keys())
|
|
|
except Exception:
|
|
|
return []
|
|
|
elif _safe_isinstance(obj, 'numpy', 'ndarray') or\
|
|
|
_safe_isinstance(obj, 'numpy', 'void'):
|
|
|
return obj.dtype.names or []
|
|
|
return []
|
|
|
|
|
|
try:
|
|
|
regexps = self.__dict_key_regexps
|
|
|
except AttributeError:
|
|
|
dict_key_re_fmt = r'''(?x)
|
|
|
( # match dict-referring expression wrt greedy setting
|
|
|
%s
|
|
|
)
|
|
|
\[ # open bracket
|
|
|
\s* # and optional whitespace
|
|
|
([uUbB]? # string prefix (r not handled)
|
|
|
(?: # unclosed string
|
|
|
'(?:[^']|(?<!\\)\\')*
|
|
|
|
|
|
|
"(?:[^"]|(?<!\\)\\")*
|
|
|
)
|
|
|
)?
|
|
|
$
|
|
|
'''
|
|
|
regexps = self.__dict_key_regexps = {
|
|
|
False: re.compile(dict_key_re_fmt % '''
|
|
|
# identifiers separated by .
|
|
|
(?!\d)\w+
|
|
|
(?:\.(?!\d)\w+)*
|
|
|
'''),
|
|
|
True: re.compile(dict_key_re_fmt % '''
|
|
|
.+
|
|
|
''')
|
|
|
}
|
|
|
|
|
|
match = regexps[self.greedy].search(self.text_until_cursor)
|
|
|
if match is None:
|
|
|
return []
|
|
|
|
|
|
expr, prefix = match.groups()
|
|
|
try:
|
|
|
obj = eval(expr, self.namespace)
|
|
|
except Exception:
|
|
|
try:
|
|
|
obj = eval(expr, self.global_namespace)
|
|
|
except Exception:
|
|
|
return []
|
|
|
|
|
|
keys = get_keys(obj)
|
|
|
if not keys:
|
|
|
return keys
|
|
|
closing_quote, token_offset, matches = match_dict_keys(keys, prefix, self.splitter.delims)
|
|
|
if not matches:
|
|
|
return matches
|
|
|
|
|
|
# get the cursor position of
|
|
|
# - the text being completed
|
|
|
# - the start of the key text
|
|
|
# - the start of the completion
|
|
|
text_start = len(self.text_until_cursor) - len(text)
|
|
|
if prefix:
|
|
|
key_start = match.start(2)
|
|
|
completion_start = key_start + token_offset
|
|
|
else:
|
|
|
key_start = completion_start = match.end()
|
|
|
|
|
|
# grab the leading prefix, to make sure all completions start with `text`
|
|
|
if text_start > key_start:
|
|
|
leading = ''
|
|
|
else:
|
|
|
leading = text[text_start:completion_start]
|
|
|
|
|
|
# the index of the `[` character
|
|
|
bracket_idx = match.end(1)
|
|
|
|
|
|
# append closing quote and bracket as appropriate
|
|
|
# this is *not* appropriate if the opening quote or bracket is outside
|
|
|
# the text given to this method
|
|
|
suf = ''
|
|
|
continuation = self.line_buffer[len(self.text_until_cursor):]
|
|
|
if key_start > text_start and closing_quote:
|
|
|
# quotes were opened inside text, maybe close them
|
|
|
if continuation.startswith(closing_quote):
|
|
|
continuation = continuation[len(closing_quote):]
|
|
|
else:
|
|
|
suf += closing_quote
|
|
|
if bracket_idx > text_start:
|
|
|
# brackets were opened inside text, maybe close them
|
|
|
if not continuation.startswith(']'):
|
|
|
suf += ']'
|
|
|
|
|
|
return [leading + k + suf for k in matches]
|
|
|
|
|
|
def unicode_name_matches(self, text):
|
|
|
u"""Match Latex-like syntax for unicode characters base
|
|
|
on the name of the character.
|
|
|
|
|
|
This does \\GREEK SMALL LETTER ETA -> η
|
|
|
|
|
|
Works only on valid python 3 identifier, or on combining characters that
|
|
|
will combine to form a valid identifier.
|
|
|
|
|
|
Used on Python 3 only.
|
|
|
"""
|
|
|
slashpos = text.rfind('\\')
|
|
|
if slashpos > -1:
|
|
|
s = text[slashpos+1:]
|
|
|
try :
|
|
|
unic = unicodedata.lookup(s)
|
|
|
# allow combining chars
|
|
|
if ('a'+unic).isidentifier():
|
|
|
return '\\'+s,[unic]
|
|
|
except KeyError as e:
|
|
|
pass
|
|
|
return u'', []
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def latex_matches(self, text):
|
|
|
u"""Match Latex syntax for unicode characters.
|
|
|
|
|
|
This does both \\alp -> \\alpha and \\alpha -> α
|
|
|
|
|
|
Used on Python 3 only.
|
|
|
"""
|
|
|
slashpos = text.rfind('\\')
|
|
|
if slashpos > -1:
|
|
|
s = text[slashpos:]
|
|
|
if s in latex_symbols:
|
|
|
# Try to complete a full latex symbol to unicode
|
|
|
# \\alpha -> α
|
|
|
return s, [latex_symbols[s]]
|
|
|
else:
|
|
|
# If a user has partially typed a latex symbol, give them
|
|
|
# a full list of options \al -> [\aleph, \alpha]
|
|
|
matches = [k for k in latex_symbols if k.startswith(s)]
|
|
|
return s, matches
|
|
|
return u'', []
|
|
|
|
|
|
def dispatch_custom_completer(self, text):
|
|
|
#io.rprint("Custom! '%s' %s" % (text, self.custom_completers)) # dbg
|
|
|
line = self.line_buffer
|
|
|
if not line.strip():
|
|
|
return None
|
|
|
|
|
|
# Create a little structure to pass all the relevant information about
|
|
|
# the current completion to any custom completer.
|
|
|
event = Bunch()
|
|
|
event.line = line
|
|
|
event.symbol = text
|
|
|
cmd = line.split(None,1)[0]
|
|
|
event.command = cmd
|
|
|
event.text_until_cursor = self.text_until_cursor
|
|
|
|
|
|
#print "\ncustom:{%s]\n" % event # dbg
|
|
|
|
|
|
# for foo etc, try also to find completer for %foo
|
|
|
if not cmd.startswith(self.magic_escape):
|
|
|
try_magic = self.custom_completers.s_matches(
|
|
|
self.magic_escape + cmd)
|
|
|
else:
|
|
|
try_magic = []
|
|
|
|
|
|
for c in itertools.chain(self.custom_completers.s_matches(cmd),
|
|
|
try_magic,
|
|
|
self.custom_completers.flat_matches(self.text_until_cursor)):
|
|
|
#print "try",c # dbg
|
|
|
try:
|
|
|
res = c(event)
|
|
|
if res:
|
|
|
# first, try case sensitive match
|
|
|
withcase = [r for r in res if r.startswith(text)]
|
|
|
if withcase:
|
|
|
return withcase
|
|
|
# if none, then case insensitive ones are ok too
|
|
|
text_low = text.lower()
|
|
|
return [r for r in res if r.lower().startswith(text_low)]
|
|
|
except TryNext:
|
|
|
pass
|
|
|
|
|
|
return None
|
|
|
|
|
|
def complete(self, text=None, line_buffer=None, cursor_pos=None):
|
|
|
"""Find completions for the given text and line context.
|
|
|
|
|
|
Note that both the text and the line_buffer are optional, but at least
|
|
|
one of them must be given.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
text : string, optional
|
|
|
Text to perform the completion on. If not given, the line buffer
|
|
|
is split using the instance's CompletionSplitter object.
|
|
|
|
|
|
line_buffer : string, optional
|
|
|
If not given, the completer attempts to obtain the current line
|
|
|
buffer via readline. This keyword allows clients which are
|
|
|
requesting for text completions in non-readline contexts to inform
|
|
|
the completer of the entire text.
|
|
|
|
|
|
cursor_pos : int, optional
|
|
|
Index of the cursor in the full line buffer. Should be provided by
|
|
|
remote frontends where kernel has no access to frontend state.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
text : str
|
|
|
Text that was actually used in the completion.
|
|
|
|
|
|
matches : list
|
|
|
A list of completion matches.
|
|
|
"""
|
|
|
# io.rprint('\nCOMP1 %r %r %r' % (text, line_buffer, cursor_pos)) # dbg
|
|
|
|
|
|
# if the cursor position isn't given, the only sane assumption we can
|
|
|
# make is that it's at the end of the line (the common case)
|
|
|
if cursor_pos is None:
|
|
|
cursor_pos = len(line_buffer) if text is None else len(text)
|
|
|
|
|
|
if PY3:
|
|
|
|
|
|
base_text = text if not line_buffer else line_buffer[:cursor_pos]
|
|
|
latex_text, latex_matches = self.latex_matches(base_text)
|
|
|
if latex_matches:
|
|
|
return latex_text, latex_matches
|
|
|
name_text = ''
|
|
|
name_matches = []
|
|
|
for meth in (self.unicode_name_matches, back_latex_name_matches, back_unicode_name_matches):
|
|
|
name_text, name_matches = meth(base_text)
|
|
|
if name_text:
|
|
|
return name_text, name_matches
|
|
|
|
|
|
# if text is either None or an empty string, rely on the line buffer
|
|
|
if not text:
|
|
|
text = self.splitter.split_line(line_buffer, cursor_pos)
|
|
|
|
|
|
# If no line buffer is given, assume the input text is all there was
|
|
|
if line_buffer is None:
|
|
|
line_buffer = text
|
|
|
|
|
|
self.line_buffer = line_buffer
|
|
|
self.text_until_cursor = self.line_buffer[:cursor_pos]
|
|
|
# io.rprint('COMP2 %r %r %r' % (text, line_buffer, cursor_pos)) # dbg
|
|
|
|
|
|
# Start with a clean slate of completions
|
|
|
self.matches[:] = []
|
|
|
custom_res = self.dispatch_custom_completer(text)
|
|
|
if custom_res is not None:
|
|
|
# did custom completers produce something?
|
|
|
self.matches = custom_res
|
|
|
else:
|
|
|
# Extend the list of completions with the results of each
|
|
|
# matcher, so we return results to the user from all
|
|
|
# namespaces.
|
|
|
if self.merge_completions:
|
|
|
self.matches = []
|
|
|
for matcher in self.matchers:
|
|
|
try:
|
|
|
self.matches.extend(matcher(text))
|
|
|
except:
|
|
|
# Show the ugly traceback if the matcher causes an
|
|
|
# exception, but do NOT crash the kernel!
|
|
|
sys.excepthook(*sys.exc_info())
|
|
|
else:
|
|
|
for matcher in self.matchers:
|
|
|
self.matches = matcher(text)
|
|
|
if self.matches:
|
|
|
break
|
|
|
# FIXME: we should extend our api to return a dict with completions for
|
|
|
# different types of objects. The rlcomplete() method could then
|
|
|
# simply collapse the dict into a list for readline, but we'd have
|
|
|
# richer completion semantics in other evironments.
|
|
|
|
|
|
# use penalize_magics_key to put magics after variables with same name
|
|
|
self.matches = sorted(set(self.matches), key=penalize_magics_key)
|
|
|
|
|
|
#io.rprint('COMP TEXT, MATCHES: %r, %r' % (text, self.matches)) # dbg
|
|
|
return text, self.matches
|
|
|
|
|
|
def rlcomplete(self, text, state):
|
|
|
"""Return the state-th possible completion for 'text'.
|
|
|
|
|
|
This is called successively with state == 0, 1, 2, ... until it
|
|
|
returns None. The completion should begin with 'text'.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
text : string
|
|
|
Text to perform the completion on.
|
|
|
|
|
|
state : int
|
|
|
Counter used by readline.
|
|
|
"""
|
|
|
if state==0:
|
|
|
|
|
|
self.line_buffer = line_buffer = self.readline.get_line_buffer()
|
|
|
cursor_pos = self.readline.get_endidx()
|
|
|
|
|
|
#io.rprint("\nRLCOMPLETE: %r %r %r" %
|
|
|
# (text, line_buffer, cursor_pos) ) # dbg
|
|
|
|
|
|
# if there is only a tab on a line with only whitespace, instead of
|
|
|
# the mostly useless 'do you want to see all million completions'
|
|
|
# message, just do the right thing and give the user his tab!
|
|
|
# Incidentally, this enables pasting of tabbed text from an editor
|
|
|
# (as long as autoindent is off).
|
|
|
|
|
|
# It should be noted that at least pyreadline still shows file
|
|
|
# completions - is there a way around it?
|
|
|
|
|
|
# don't apply this on 'dumb' terminals, such as emacs buffers, so
|
|
|
# we don't interfere with their own tab-completion mechanism.
|
|
|
if not (self.dumb_terminal or line_buffer.strip()):
|
|
|
self.readline.insert_text('\t')
|
|
|
sys.stdout.flush()
|
|
|
return None
|
|
|
|
|
|
# Note: debugging exceptions that may occur in completion is very
|
|
|
# tricky, because readline unconditionally silences them. So if
|
|
|
# during development you suspect a bug in the completion code, turn
|
|
|
# this flag on temporarily by uncommenting the second form (don't
|
|
|
# flip the value in the first line, as the '# dbg' marker can be
|
|
|
# automatically detected and is used elsewhere).
|
|
|
DEBUG = False
|
|
|
#DEBUG = True # dbg
|
|
|
if DEBUG:
|
|
|
try:
|
|
|
self.complete(text, line_buffer, cursor_pos)
|
|
|
except:
|
|
|
import traceback; traceback.print_exc()
|
|
|
else:
|
|
|
# The normal production version is here
|
|
|
|
|
|
# This method computes the self.matches array
|
|
|
self.complete(text, line_buffer, cursor_pos)
|
|
|
|
|
|
try:
|
|
|
return self.matches[state]
|
|
|
except IndexError:
|
|
|
return None
|
|
|
|
|
|
|
