|
|
# -*- coding: utf-8 -*-
|
|
|
"""Tools for inspecting Python objects.
|
|
|
|
|
|
Uses syntax highlighting for presenting the various information elements.
|
|
|
|
|
|
Similar in spirit to the inspect module, but all calls take a name argument to
|
|
|
reference the name under which an object is being read.
|
|
|
"""
|
|
|
|
|
|
# Copyright (c) IPython Development Team.
|
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
|
|
|
from __future__ import print_function
|
|
|
|
|
|
__all__ = ['Inspector','InspectColors']
|
|
|
|
|
|
# stdlib modules
|
|
|
import inspect
|
|
|
import linecache
|
|
|
import os
|
|
|
from textwrap import dedent
|
|
|
import types
|
|
|
import io as stdlib_io
|
|
|
|
|
|
try:
|
|
|
from itertools import izip_longest
|
|
|
except ImportError:
|
|
|
from itertools import zip_longest as izip_longest
|
|
|
|
|
|
# IPython's own
|
|
|
from IPython.core import page
|
|
|
from IPython.lib.pretty import pretty
|
|
|
from IPython.testing.skipdoctest import skip_doctest_py3
|
|
|
from IPython.utils import PyColorize
|
|
|
from IPython.utils import io
|
|
|
from IPython.utils import openpy
|
|
|
from IPython.utils import py3compat
|
|
|
from IPython.utils.dir2 import safe_hasattr
|
|
|
from IPython.utils.path import compress_user
|
|
|
from IPython.utils.text import indent
|
|
|
from IPython.utils.wildcard import list_namespace
|
|
|
from IPython.utils.coloransi import TermColors, ColorScheme, ColorSchemeTable
|
|
|
from IPython.utils.py3compat import cast_unicode, string_types, PY3
|
|
|
from IPython.utils.signatures import signature
|
|
|
from IPython.utils.colorable import Colorable
|
|
|
|
|
|
# builtin docstrings to ignore
|
|
|
_func_call_docstring = types.FunctionType.__call__.__doc__
|
|
|
_object_init_docstring = object.__init__.__doc__
|
|
|
_builtin_type_docstrings = {
|
|
|
inspect.getdoc(t) for t in (types.ModuleType, types.MethodType,
|
|
|
types.FunctionType, property)
|
|
|
}
|
|
|
|
|
|
_builtin_func_type = type(all)
|
|
|
_builtin_meth_type = type(str.upper) # Bound methods have the same type as builtin functions
|
|
|
#****************************************************************************
|
|
|
# Builtin color schemes
|
|
|
|
|
|
Colors = TermColors # just a shorthand
|
|
|
|
|
|
InspectColors = PyColorize.ANSICodeColors
|
|
|
|
|
|
#****************************************************************************
|
|
|
# Auxiliary functions and objects
|
|
|
|
|
|
# See the messaging spec for the definition of all these fields. This list
|
|
|
# effectively defines the order of display
|
|
|
info_fields = ['type_name', 'base_class', 'string_form', 'namespace',
|
|
|
'length', 'file', 'definition', 'docstring', 'source',
|
|
|
'init_definition', 'class_docstring', 'init_docstring',
|
|
|
'call_def', 'call_docstring',
|
|
|
# These won't be printed but will be used to determine how to
|
|
|
# format the object
|
|
|
'ismagic', 'isalias', 'isclass', 'argspec', 'found', 'name'
|
|
|
]
|
|
|
|
|
|
|
|
|
def object_info(**kw):
|
|
|
"""Make an object info dict with all fields present."""
|
|
|
infodict = dict(izip_longest(info_fields, [None]))
|
|
|
infodict.update(kw)
|
|
|
return infodict
|
|
|
|
|
|
|
|
|
def get_encoding(obj):
|
|
|
"""Get encoding for python source file defining obj
|
|
|
|
|
|
Returns None if obj is not defined in a sourcefile.
|
|
|
"""
|
|
|
ofile = find_file(obj)
|
|
|
# run contents of file through pager starting at line where the object
|
|
|
# is defined, as long as the file isn't binary and is actually on the
|
|
|
# filesystem.
|
|
|
if ofile is None:
|
|
|
return None
|
|
|
elif ofile.endswith(('.so', '.dll', '.pyd')):
|
|
|
return None
|
|
|
elif not os.path.isfile(ofile):
|
|
|
return None
|
|
|
else:
|
|
|
# Print only text files, not extension binaries. Note that
|
|
|
# getsourcelines returns lineno with 1-offset and page() uses
|
|
|
# 0-offset, so we must adjust.
|
|
|
with stdlib_io.open(ofile, 'rb') as buffer: # Tweaked to use io.open for Python 2
|
|
|
encoding, lines = openpy.detect_encoding(buffer.readline)
|
|
|
return encoding
|
|
|
|
|
|
def getdoc(obj):
|
|
|
"""Stable wrapper around inspect.getdoc.
|
|
|
|
|
|
This can't crash because of attribute problems.
|
|
|
|
|
|
It also attempts to call a getdoc() method on the given object. This
|
|
|
allows objects which provide their docstrings via non-standard mechanisms
|
|
|
(like Pyro proxies) to still be inspected by ipython's ? system."""
|
|
|
# Allow objects to offer customized documentation via a getdoc method:
|
|
|
try:
|
|
|
ds = obj.getdoc()
|
|
|
except Exception:
|
|
|
pass
|
|
|
else:
|
|
|
# if we get extra info, we add it to the normal docstring.
|
|
|
if isinstance(ds, string_types):
|
|
|
return inspect.cleandoc(ds)
|
|
|
|
|
|
try:
|
|
|
docstr = inspect.getdoc(obj)
|
|
|
encoding = get_encoding(obj)
|
|
|
return py3compat.cast_unicode(docstr, encoding=encoding)
|
|
|
except Exception:
|
|
|
# Harden against an inspect failure, which can occur with
|
|
|
# SWIG-wrapped extensions.
|
|
|
raise
|
|
|
return None
|
|
|
|
|
|
|
|
|
def getsource(obj, oname=''):
|
|
|
"""Wrapper around inspect.getsource.
|
|
|
|
|
|
This can be modified by other projects to provide customized source
|
|
|
extraction.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
obj : object
|
|
|
an object whose source code we will attempt to extract
|
|
|
oname : str
|
|
|
(optional) a name under which the object is known
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
src : unicode or None
|
|
|
|
|
|
"""
|
|
|
|
|
|
if isinstance(obj, property):
|
|
|
sources = []
|
|
|
for attrname in ['fget', 'fset', 'fdel']:
|
|
|
fn = getattr(obj, attrname)
|
|
|
if fn is not None:
|
|
|
encoding = get_encoding(fn)
|
|
|
oname_prefix = ('%s.' % oname) if oname else ''
|
|
|
sources.append(cast_unicode(
|
|
|
''.join(('# ', oname_prefix, attrname)),
|
|
|
encoding=encoding))
|
|
|
if inspect.isfunction(fn):
|
|
|
sources.append(dedent(getsource(fn)))
|
|
|
else:
|
|
|
# Default str/repr only prints function name,
|
|
|
# pretty.pretty prints module name too.
|
|
|
sources.append(cast_unicode(
|
|
|
'%s%s = %s\n' % (
|
|
|
oname_prefix, attrname, pretty(fn)),
|
|
|
encoding=encoding))
|
|
|
if sources:
|
|
|
return '\n'.join(sources)
|
|
|
else:
|
|
|
return None
|
|
|
|
|
|
else:
|
|
|
# Get source for non-property objects.
|
|
|
|
|
|
obj = _get_wrapped(obj)
|
|
|
|
|
|
try:
|
|
|
src = inspect.getsource(obj)
|
|
|
except TypeError:
|
|
|
# The object itself provided no meaningful source, try looking for
|
|
|
# its class definition instead.
|
|
|
if hasattr(obj, '__class__'):
|
|
|
try:
|
|
|
src = inspect.getsource(obj.__class__)
|
|
|
except TypeError:
|
|
|
return None
|
|
|
|
|
|
encoding = get_encoding(obj)
|
|
|
return cast_unicode(src, encoding=encoding)
|
|
|
|
|
|
|
|
|
def is_simple_callable(obj):
|
|
|
"""True if obj is a function ()"""
|
|
|
return (inspect.isfunction(obj) or inspect.ismethod(obj) or \
|
|
|
isinstance(obj, _builtin_func_type) or isinstance(obj, _builtin_meth_type))
|
|
|
|
|
|
|
|
|
def getargspec(obj):
|
|
|
"""Wrapper around :func:`inspect.getfullargspec` on Python 3, and
|
|
|
:func:inspect.getargspec` on Python 2.
|
|
|
|
|
|
In addition to functions and methods, this can also handle objects with a
|
|
|
``__call__`` attribute.
|
|
|
"""
|
|
|
if safe_hasattr(obj, '__call__') and not is_simple_callable(obj):
|
|
|
obj = obj.__call__
|
|
|
|
|
|
return inspect.getfullargspec(obj) if PY3 else inspect.getargspec(obj)
|
|
|
|
|
|
|
|
|
def format_argspec(argspec):
|
|
|
"""Format argspect, convenience wrapper around inspect's.
|
|
|
|
|
|
This takes a dict instead of ordered arguments and calls
|
|
|
inspect.format_argspec with the arguments in the necessary order.
|
|
|
"""
|
|
|
return inspect.formatargspec(argspec['args'], argspec['varargs'],
|
|
|
argspec['varkw'], argspec['defaults'])
|
|
|
|
|
|
|
|
|
def call_tip(oinfo, format_call=True):
|
|
|
"""Extract call tip data from an oinfo dict.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
oinfo : dict
|
|
|
|
|
|
format_call : bool, optional
|
|
|
If True, the call line is formatted and returned as a string. If not, a
|
|
|
tuple of (name, argspec) is returned.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
call_info : None, str or (str, dict) tuple.
|
|
|
When format_call is True, the whole call information is formattted as a
|
|
|
single string. Otherwise, the object's name and its argspec dict are
|
|
|
returned. If no call information is available, None is returned.
|
|
|
|
|
|
docstring : str or None
|
|
|
The most relevant docstring for calling purposes is returned, if
|
|
|
available. The priority is: call docstring for callable instances, then
|
|
|
constructor docstring for classes, then main object's docstring otherwise
|
|
|
(regular functions).
|
|
|
"""
|
|
|
# Get call definition
|
|
|
argspec = oinfo.get('argspec')
|
|
|
if argspec is None:
|
|
|
call_line = None
|
|
|
else:
|
|
|
# Callable objects will have 'self' as their first argument, prune
|
|
|
# it out if it's there for clarity (since users do *not* pass an
|
|
|
# extra first argument explicitly).
|
|
|
try:
|
|
|
has_self = argspec['args'][0] == 'self'
|
|
|
except (KeyError, IndexError):
|
|
|
pass
|
|
|
else:
|
|
|
if has_self:
|
|
|
argspec['args'] = argspec['args'][1:]
|
|
|
|
|
|
call_line = oinfo['name']+format_argspec(argspec)
|
|
|
|
|
|
# Now get docstring.
|
|
|
# The priority is: call docstring, constructor docstring, main one.
|
|
|
doc = oinfo.get('call_docstring')
|
|
|
if doc is None:
|
|
|
doc = oinfo.get('init_docstring')
|
|
|
if doc is None:
|
|
|
doc = oinfo.get('docstring','')
|
|
|
|
|
|
return call_line, doc
|
|
|
|
|
|
|
|
|
def _get_wrapped(obj):
|
|
|
"""Get the original object if wrapped in one or more @decorators
|
|
|
|
|
|
Some objects automatically construct similar objects on any unrecognised
|
|
|
attribute access (e.g. unittest.mock.call). To protect against infinite loops,
|
|
|
this will arbitrarily cut off after 100 levels of obj.__wrapped__
|
|
|
attribute access. --TK, Jan 2016
|
|
|
"""
|
|
|
orig_obj = obj
|
|
|
i = 0
|
|
|
while safe_hasattr(obj, '__wrapped__'):
|
|
|
obj = obj.__wrapped__
|
|
|
i += 1
|
|
|
if i > 100:
|
|
|
# __wrapped__ is probably a lie, so return the thing we started with
|
|
|
return orig_obj
|
|
|
return obj
|
|
|
|
|
|
def find_file(obj):
|
|
|
"""Find the absolute path to the file where an object was defined.
|
|
|
|
|
|
This is essentially a robust wrapper around `inspect.getabsfile`.
|
|
|
|
|
|
Returns None if no file can be found.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
obj : any Python object
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
fname : str
|
|
|
The absolute path to the file where the object was defined.
|
|
|
"""
|
|
|
obj = _get_wrapped(obj)
|
|
|
|
|
|
fname = None
|
|
|
try:
|
|
|
fname = inspect.getabsfile(obj)
|
|
|
except TypeError:
|
|
|
# For an instance, the file that matters is where its class was
|
|
|
# declared.
|
|
|
if hasattr(obj, '__class__'):
|
|
|
try:
|
|
|
fname = inspect.getabsfile(obj.__class__)
|
|
|
except TypeError:
|
|
|
# Can happen for builtins
|
|
|
pass
|
|
|
except:
|
|
|
pass
|
|
|
return cast_unicode(fname)
|
|
|
|
|
|
|
|
|
def find_source_lines(obj):
|
|
|
"""Find the line number in a file where an object was defined.
|
|
|
|
|
|
This is essentially a robust wrapper around `inspect.getsourcelines`.
|
|
|
|
|
|
Returns None if no file can be found.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
obj : any Python object
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
lineno : int
|
|
|
The line number where the object definition starts.
|
|
|
"""
|
|
|
obj = _get_wrapped(obj)
|
|
|
|
|
|
try:
|
|
|
try:
|
|
|
lineno = inspect.getsourcelines(obj)[1]
|
|
|
except TypeError:
|
|
|
# For instances, try the class object like getsource() does
|
|
|
if hasattr(obj, '__class__'):
|
|
|
lineno = inspect.getsourcelines(obj.__class__)[1]
|
|
|
else:
|
|
|
lineno = None
|
|
|
except:
|
|
|
return None
|
|
|
|
|
|
return lineno
|
|
|
|
|
|
|
|
|
class Inspector(Colorable):
|
|
|
def __init__(self, color_table=InspectColors,
|
|
|
code_color_table=PyColorize.ANSICodeColors,
|
|
|
scheme='NoColor',
|
|
|
str_detail_level=0,
|
|
|
parent=None, config=None):
|
|
|
super(Inspector, self).__init__(parent=parent, config=config)
|
|
|
self.color_table = color_table
|
|
|
self.parser = PyColorize.Parser(out='str', parent=self, style=scheme)
|
|
|
self.format = self.parser.format
|
|
|
self.str_detail_level = str_detail_level
|
|
|
self.set_active_scheme(scheme)
|
|
|
|
|
|
def _getdef(self,obj,oname=''):
|
|
|
"""Return the call signature for any callable object.
|
|
|
|
|
|
If any exception is generated, None is returned instead and the
|
|
|
exception is suppressed."""
|
|
|
try:
|
|
|
hdef = oname + str(signature(obj))
|
|
|
return cast_unicode(hdef)
|
|
|
except:
|
|
|
return None
|
|
|
|
|
|
def __head(self,h):
|
|
|
"""Return a header string with proper colors."""
|
|
|
return '%s%s%s' % (self.color_table.active_colors.header,h,
|
|
|
self.color_table.active_colors.normal)
|
|
|
|
|
|
def set_active_scheme(self, scheme):
|
|
|
self.color_table.set_active_scheme(scheme)
|
|
|
self.parser.color_table.set_active_scheme(scheme)
|
|
|
|
|
|
def noinfo(self, msg, oname):
|
|
|
"""Generic message when no information is found."""
|
|
|
print('No %s found' % msg, end=' ')
|
|
|
if oname:
|
|
|
print('for %s' % oname)
|
|
|
else:
|
|
|
print()
|
|
|
|
|
|
def pdef(self, obj, oname=''):
|
|
|
"""Print the call signature for any callable object.
|
|
|
|
|
|
If the object is a class, print the constructor information."""
|
|
|
|
|
|
if not callable(obj):
|
|
|
print('Object is not callable.')
|
|
|
return
|
|
|
|
|
|
header = ''
|
|
|
|
|
|
if inspect.isclass(obj):
|
|
|
header = self.__head('Class constructor information:\n')
|
|
|
obj = obj.__init__
|
|
|
elif (not py3compat.PY3) and type(obj) is types.InstanceType:
|
|
|
obj = obj.__call__
|
|
|
|
|
|
output = self._getdef(obj,oname)
|
|
|
if output is None:
|
|
|
self.noinfo('definition header',oname)
|
|
|
else:
|
|
|
print(header,self.format(output), end=' ', file=io.stdout)
|
|
|
|
|
|
# In Python 3, all classes are new-style, so they all have __init__.
|
|
|
@skip_doctest_py3
|
|
|
def pdoc(self,obj,oname='',formatter = None):
|
|
|
"""Print the docstring for any object.
|
|
|
|
|
|
Optional:
|
|
|
-formatter: a function to run the docstring through for specially
|
|
|
formatted docstrings.
|
|
|
|
|
|
Examples
|
|
|
--------
|
|
|
|
|
|
In [1]: class NoInit:
|
|
|
...: pass
|
|
|
|
|
|
In [2]: class NoDoc:
|
|
|
...: def __init__(self):
|
|
|
...: pass
|
|
|
|
|
|
In [3]: %pdoc NoDoc
|
|
|
No documentation found for NoDoc
|
|
|
|
|
|
In [4]: %pdoc NoInit
|
|
|
No documentation found for NoInit
|
|
|
|
|
|
In [5]: obj = NoInit()
|
|
|
|
|
|
In [6]: %pdoc obj
|
|
|
No documentation found for obj
|
|
|
|
|
|
In [5]: obj2 = NoDoc()
|
|
|
|
|
|
In [6]: %pdoc obj2
|
|
|
No documentation found for obj2
|
|
|
"""
|
|
|
|
|
|
head = self.__head # For convenience
|
|
|
lines = []
|
|
|
ds = getdoc(obj)
|
|
|
if formatter:
|
|
|
ds = formatter(ds)
|
|
|
if ds:
|
|
|
lines.append(head("Class docstring:"))
|
|
|
lines.append(indent(ds))
|
|
|
if inspect.isclass(obj) and hasattr(obj, '__init__'):
|
|
|
init_ds = getdoc(obj.__init__)
|
|
|
if init_ds is not None:
|
|
|
lines.append(head("Init docstring:"))
|
|
|
lines.append(indent(init_ds))
|
|
|
elif hasattr(obj,'__call__'):
|
|
|
call_ds = getdoc(obj.__call__)
|
|
|
if call_ds:
|
|
|
lines.append(head("Call docstring:"))
|
|
|
lines.append(indent(call_ds))
|
|
|
|
|
|
if not lines:
|
|
|
self.noinfo('documentation',oname)
|
|
|
else:
|
|
|
page.page('\n'.join(lines))
|
|
|
|
|
|
def psource(self, obj, oname=''):
|
|
|
"""Print the source code for an object."""
|
|
|
|
|
|
# Flush the source cache because inspect can return out-of-date source
|
|
|
linecache.checkcache()
|
|
|
try:
|
|
|
src = getsource(obj, oname=oname)
|
|
|
except Exception:
|
|
|
src = None
|
|
|
|
|
|
if src is None:
|
|
|
self.noinfo('source', oname)
|
|
|
else:
|
|
|
page.page(self.format(src))
|
|
|
|
|
|
def pfile(self, obj, oname=''):
|
|
|
"""Show the whole file where an object was defined."""
|
|
|
|
|
|
lineno = find_source_lines(obj)
|
|
|
if lineno is None:
|
|
|
self.noinfo('file', oname)
|
|
|
return
|
|
|
|
|
|
ofile = find_file(obj)
|
|
|
# run contents of file through pager starting at line where the object
|
|
|
# is defined, as long as the file isn't binary and is actually on the
|
|
|
# filesystem.
|
|
|
if ofile.endswith(('.so', '.dll', '.pyd')):
|
|
|
print('File %r is binary, not printing.' % ofile)
|
|
|
elif not os.path.isfile(ofile):
|
|
|
print('File %r does not exist, not printing.' % ofile)
|
|
|
else:
|
|
|
# Print only text files, not extension binaries. Note that
|
|
|
# getsourcelines returns lineno with 1-offset and page() uses
|
|
|
# 0-offset, so we must adjust.
|
|
|
page.page(self.format(openpy.read_py_file(ofile, skip_encoding_cookie=False)), lineno - 1)
|
|
|
|
|
|
def _format_fields(self, fields, title_width=0):
|
|
|
"""Formats a list of fields for display.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
fields : list
|
|
|
A list of 2-tuples: (field_title, field_content)
|
|
|
title_width : int
|
|
|
How many characters to pad titles to. Default to longest title.
|
|
|
"""
|
|
|
out = []
|
|
|
header = self.__head
|
|
|
if title_width == 0:
|
|
|
title_width = max(len(title) + 2 for title, _ in fields)
|
|
|
for title, content in fields:
|
|
|
if len(content.splitlines()) > 1:
|
|
|
title = header(title + ":") + "\n"
|
|
|
else:
|
|
|
title = header((title+":").ljust(title_width))
|
|
|
out.append(cast_unicode(title) + cast_unicode(content))
|
|
|
return "\n".join(out)
|
|
|
|
|
|
def _format_info(self, obj, oname='', formatter=None, info=None, detail_level=0):
|
|
|
"""Format an info dict as text"""
|
|
|
info = self.info(obj, oname=oname, formatter=formatter,
|
|
|
info=info, detail_level=detail_level)
|
|
|
displayfields = []
|
|
|
def add_fields(fields):
|
|
|
for title, key in fields:
|
|
|
field = info[key]
|
|
|
if field is not None:
|
|
|
if key == "source":
|
|
|
displayfields.append((title, self.format(cast_unicode(field.rstrip()))))
|
|
|
else:
|
|
|
displayfields.append((title, field.rstrip()))
|
|
|
|
|
|
if info['isalias']:
|
|
|
add_fields([('Repr', "string_form")])
|
|
|
|
|
|
elif info['ismagic']:
|
|
|
if detail_level > 0 and info['source'] is not None:
|
|
|
add_fields([("Source", "source")])
|
|
|
else:
|
|
|
add_fields([("Docstring", "docstring")])
|
|
|
|
|
|
add_fields([("File", "file"),
|
|
|
])
|
|
|
|
|
|
elif info['isclass'] or is_simple_callable(obj):
|
|
|
# Functions, methods, classes
|
|
|
add_fields([("Signature", "definition"),
|
|
|
("Init signature", "init_definition"),
|
|
|
])
|
|
|
if detail_level > 0 and info['source'] is not None:
|
|
|
add_fields([("Source", "source")])
|
|
|
else:
|
|
|
add_fields([("Docstring", "docstring"),
|
|
|
("Init docstring", "init_docstring"),
|
|
|
])
|
|
|
|
|
|
add_fields([('File', 'file'),
|
|
|
('Type', 'type_name'),
|
|
|
])
|
|
|
|
|
|
else:
|
|
|
# General Python objects
|
|
|
add_fields([("Type", "type_name")])
|
|
|
|
|
|
# Base class for old-style instances
|
|
|
if (not py3compat.PY3) and isinstance(obj, types.InstanceType) and info['base_class']:
|
|
|
displayfields.append(("Base Class", info['base_class'].rstrip()))
|
|
|
|
|
|
add_fields([("String form", "string_form")])
|
|
|
|
|
|
# Namespace
|
|
|
if info['namespace'] != 'Interactive':
|
|
|
displayfields.append(("Namespace", info['namespace'].rstrip()))
|
|
|
|
|
|
add_fields([("Length", "length"),
|
|
|
("File", "file"),
|
|
|
("Signature", "definition"),
|
|
|
])
|
|
|
|
|
|
# Source or docstring, depending on detail level and whether
|
|
|
# source found.
|
|
|
if detail_level > 0 and info['source'] is not None:
|
|
|
displayfields.append(("Source",
|
|
|
self.format(cast_unicode(info['source']))))
|
|
|
elif info['docstring'] is not None:
|
|
|
displayfields.append(("Docstring", info["docstring"]))
|
|
|
|
|
|
add_fields([("Class docstring", "class_docstring"),
|
|
|
("Init docstring", "init_docstring"),
|
|
|
("Call signature", "call_def"),
|
|
|
("Call docstring", "call_docstring")])
|
|
|
|
|
|
if displayfields:
|
|
|
return self._format_fields(displayfields)
|
|
|
else:
|
|
|
return u''
|
|
|
|
|
|
def pinfo(self, obj, oname='', formatter=None, info=None, detail_level=0):
|
|
|
"""Show detailed information about an object.
|
|
|
|
|
|
Optional arguments:
|
|
|
|
|
|
- oname: name of the variable pointing to the object.
|
|
|
|
|
|
- formatter: special formatter for docstrings (see pdoc)
|
|
|
|
|
|
- info: a structure with some information fields which may have been
|
|
|
precomputed already.
|
|
|
|
|
|
- detail_level: if set to 1, more information is given.
|
|
|
"""
|
|
|
text = self._format_info(obj, oname, formatter, info, detail_level)
|
|
|
if text:
|
|
|
page.page(text)
|
|
|
|
|
|
def info(self, obj, oname='', formatter=None, info=None, detail_level=0):
|
|
|
"""Compute a dict with detailed information about an object.
|
|
|
|
|
|
Optional arguments:
|
|
|
|
|
|
- oname: name of the variable pointing to the object.
|
|
|
|
|
|
- formatter: special formatter for docstrings (see pdoc)
|
|
|
|
|
|
- info: a structure with some information fields which may have been
|
|
|
precomputed already.
|
|
|
|
|
|
- detail_level: if set to 1, more information is given.
|
|
|
"""
|
|
|
|
|
|
obj_type = type(obj)
|
|
|
|
|
|
if info is None:
|
|
|
ismagic = 0
|
|
|
isalias = 0
|
|
|
ospace = ''
|
|
|
else:
|
|
|
ismagic = info.ismagic
|
|
|
isalias = info.isalias
|
|
|
ospace = info.namespace
|
|
|
|
|
|
# Get docstring, special-casing aliases:
|
|
|
if isalias:
|
|
|
if not callable(obj):
|
|
|
try:
|
|
|
ds = "Alias to the system command:\n %s" % obj[1]
|
|
|
except:
|
|
|
ds = "Alias: " + str(obj)
|
|
|
else:
|
|
|
ds = "Alias to " + str(obj)
|
|
|
if obj.__doc__:
|
|
|
ds += "\nDocstring:\n" + obj.__doc__
|
|
|
else:
|
|
|
ds = getdoc(obj)
|
|
|
if ds is None:
|
|
|
ds = '<no docstring>'
|
|
|
if formatter is not None:
|
|
|
ds = formatter(ds)
|
|
|
|
|
|
# store output in a dict, we initialize it here and fill it as we go
|
|
|
out = dict(name=oname, found=True, isalias=isalias, ismagic=ismagic)
|
|
|
|
|
|
string_max = 200 # max size of strings to show (snipped if longer)
|
|
|
shalf = int((string_max -5)/2)
|
|
|
|
|
|
if ismagic:
|
|
|
obj_type_name = 'Magic function'
|
|
|
elif isalias:
|
|
|
obj_type_name = 'System alias'
|
|
|
else:
|
|
|
obj_type_name = obj_type.__name__
|
|
|
out['type_name'] = obj_type_name
|
|
|
|
|
|
try:
|
|
|
bclass = obj.__class__
|
|
|
out['base_class'] = str(bclass)
|
|
|
except: pass
|
|
|
|
|
|
# String form, but snip if too long in ? form (full in ??)
|
|
|
if detail_level >= self.str_detail_level:
|
|
|
try:
|
|
|
ostr = str(obj)
|
|
|
str_head = 'string_form'
|
|
|
if not detail_level and len(ostr)>string_max:
|
|
|
ostr = ostr[:shalf] + ' <...> ' + ostr[-shalf:]
|
|
|
ostr = ("\n" + " " * len(str_head.expandtabs())).\
|
|
|
join(q.strip() for q in ostr.split("\n"))
|
|
|
out[str_head] = ostr
|
|
|
except:
|
|
|
pass
|
|
|
|
|
|
if ospace:
|
|
|
out['namespace'] = ospace
|
|
|
|
|
|
# Length (for strings and lists)
|
|
|
try:
|
|
|
out['length'] = str(len(obj))
|
|
|
except: pass
|
|
|
|
|
|
# Filename where object was defined
|
|
|
binary_file = False
|
|
|
fname = find_file(obj)
|
|
|
if fname is None:
|
|
|
# if anything goes wrong, we don't want to show source, so it's as
|
|
|
# if the file was binary
|
|
|
binary_file = True
|
|
|
else:
|
|
|
if fname.endswith(('.so', '.dll', '.pyd')):
|
|
|
binary_file = True
|
|
|
elif fname.endswith('<string>'):
|
|
|
fname = 'Dynamically generated function. No source code available.'
|
|
|
out['file'] = compress_user(fname)
|
|
|
|
|
|
# Original source code for a callable, class or property.
|
|
|
if detail_level:
|
|
|
# Flush the source cache because inspect can return out-of-date
|
|
|
# source
|
|
|
linecache.checkcache()
|
|
|
try:
|
|
|
if isinstance(obj, property) or not binary_file:
|
|
|
src = getsource(obj, oname)
|
|
|
if src is not None:
|
|
|
src = src.rstrip()
|
|
|
out['source'] = src
|
|
|
|
|
|
except Exception:
|
|
|
pass
|
|
|
|
|
|
# Add docstring only if no source is to be shown (avoid repetitions).
|
|
|
if ds and out.get('source', None) is None:
|
|
|
out['docstring'] = ds
|
|
|
|
|
|
# Constructor docstring for classes
|
|
|
if inspect.isclass(obj):
|
|
|
out['isclass'] = True
|
|
|
# reconstruct the function definition and print it:
|
|
|
try:
|
|
|
obj_init = obj.__init__
|
|
|
except AttributeError:
|
|
|
init_def = init_ds = None
|
|
|
else:
|
|
|
init_def = self._getdef(obj_init,oname)
|
|
|
init_ds = getdoc(obj_init)
|
|
|
# Skip Python's auto-generated docstrings
|
|
|
if init_ds == _object_init_docstring:
|
|
|
init_ds = None
|
|
|
|
|
|
if init_def or init_ds:
|
|
|
if init_def:
|
|
|
out['init_definition'] = self.format(init_def)
|
|
|
if init_ds:
|
|
|
out['init_docstring'] = init_ds
|
|
|
|
|
|
# and class docstring for instances:
|
|
|
else:
|
|
|
# reconstruct the function definition and print it:
|
|
|
defln = self._getdef(obj, oname)
|
|
|
if defln:
|
|
|
out['definition'] = self.format(defln)
|
|
|
|
|
|
# First, check whether the instance docstring is identical to the
|
|
|
# class one, and print it separately if they don't coincide. In
|
|
|
# most cases they will, but it's nice to print all the info for
|
|
|
# objects which use instance-customized docstrings.
|
|
|
if ds:
|
|
|
try:
|
|
|
cls = getattr(obj,'__class__')
|
|
|
except:
|
|
|
class_ds = None
|
|
|
else:
|
|
|
class_ds = getdoc(cls)
|
|
|
# Skip Python's auto-generated docstrings
|
|
|
if class_ds in _builtin_type_docstrings:
|
|
|
class_ds = None
|
|
|
if class_ds and ds != class_ds:
|
|
|
out['class_docstring'] = class_ds
|
|
|
|
|
|
# Next, try to show constructor docstrings
|
|
|
try:
|
|
|
init_ds = getdoc(obj.__init__)
|
|
|
# Skip Python's auto-generated docstrings
|
|
|
if init_ds == _object_init_docstring:
|
|
|
init_ds = None
|
|
|
except AttributeError:
|
|
|
init_ds = None
|
|
|
if init_ds:
|
|
|
out['init_docstring'] = init_ds
|
|
|
|
|
|
# Call form docstring for callable instances
|
|
|
if safe_hasattr(obj, '__call__') and not is_simple_callable(obj):
|
|
|
call_def = self._getdef(obj.__call__, oname)
|
|
|
if call_def:
|
|
|
call_def = self.format(call_def)
|
|
|
# it may never be the case that call def and definition differ,
|
|
|
# but don't include the same signature twice
|
|
|
if call_def != out.get('definition'):
|
|
|
out['call_def'] = call_def
|
|
|
call_ds = getdoc(obj.__call__)
|
|
|
# Skip Python's auto-generated docstrings
|
|
|
if call_ds == _func_call_docstring:
|
|
|
call_ds = None
|
|
|
if call_ds:
|
|
|
out['call_docstring'] = call_ds
|
|
|
|
|
|
# Compute the object's argspec as a callable. The key is to decide
|
|
|
# whether to pull it from the object itself, from its __init__ or
|
|
|
# from its __call__ method.
|
|
|
|
|
|
if inspect.isclass(obj):
|
|
|
# Old-style classes need not have an __init__
|
|
|
callable_obj = getattr(obj, "__init__", None)
|
|
|
elif callable(obj):
|
|
|
callable_obj = obj
|
|
|
else:
|
|
|
callable_obj = None
|
|
|
|
|
|
if callable_obj is not None:
|
|
|
try:
|
|
|
argspec = getargspec(callable_obj)
|
|
|
except (TypeError, AttributeError):
|
|
|
# For extensions/builtins we can't retrieve the argspec
|
|
|
pass
|
|
|
else:
|
|
|
# named tuples' _asdict() method returns an OrderedDict, but we
|
|
|
# we want a normal
|
|
|
out['argspec'] = argspec_dict = dict(argspec._asdict())
|
|
|
# We called this varkw before argspec became a named tuple.
|
|
|
# With getfullargspec it's also called varkw.
|
|
|
if 'varkw' not in argspec_dict:
|
|
|
argspec_dict['varkw'] = argspec_dict.pop('keywords')
|
|
|
|
|
|
return object_info(**out)
|
|
|
|
|
|
def psearch(self,pattern,ns_table,ns_search=[],
|
|
|
ignore_case=False,show_all=False):
|
|
|
"""Search namespaces with wildcards for objects.
|
|
|
|
|
|
Arguments:
|
|
|
|
|
|
- pattern: string containing shell-like wildcards to use in namespace
|
|
|
searches and optionally a type specification to narrow the search to
|
|
|
objects of that type.
|
|
|
|
|
|
- ns_table: dict of name->namespaces for search.
|
|
|
|
|
|
Optional arguments:
|
|
|
|
|
|
- ns_search: list of namespace names to include in search.
|
|
|
|
|
|
- ignore_case(False): make the search case-insensitive.
|
|
|
|
|
|
- show_all(False): show all names, including those starting with
|
|
|
underscores.
|
|
|
"""
|
|
|
#print 'ps pattern:<%r>' % pattern # dbg
|
|
|
|
|
|
# defaults
|
|
|
type_pattern = 'all'
|
|
|
filter = ''
|
|
|
|
|
|
cmds = pattern.split()
|
|
|
len_cmds = len(cmds)
|
|
|
if len_cmds == 1:
|
|
|
# Only filter pattern given
|
|
|
filter = cmds[0]
|
|
|
elif len_cmds == 2:
|
|
|
# Both filter and type specified
|
|
|
filter,type_pattern = cmds
|
|
|
else:
|
|
|
raise ValueError('invalid argument string for psearch: <%s>' %
|
|
|
pattern)
|
|
|
|
|
|
# filter search namespaces
|
|
|
for name in ns_search:
|
|
|
if name not in ns_table:
|
|
|
raise ValueError('invalid namespace <%s>. Valid names: %s' %
|
|
|
(name,ns_table.keys()))
|
|
|
|
|
|
#print 'type_pattern:',type_pattern # dbg
|
|
|
search_result, namespaces_seen = set(), set()
|
|
|
for ns_name in ns_search:
|
|
|
ns = ns_table[ns_name]
|
|
|
# Normally, locals and globals are the same, so we just check one.
|
|
|
if id(ns) in namespaces_seen:
|
|
|
continue
|
|
|
namespaces_seen.add(id(ns))
|
|
|
tmp_res = list_namespace(ns, type_pattern, filter,
|
|
|
ignore_case=ignore_case, show_all=show_all)
|
|
|
search_result.update(tmp_res)
|
|
|
|
|
|
page.page('\n'.join(sorted(search_result)))
|
|
|
|
