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""" History related magics and functionality """
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#-----------------------------------------------------------------------------
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# Copyright (C) 2010 The IPython Development Team.
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#
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# Distributed under the terms of the BSD License.
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#
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# The full license is in the file COPYING.txt, distributed with this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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from __future__ import print_function
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# Stdlib imports
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import os
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import re
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import sqlite3
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# Our own packages
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from IPython.config.configurable import Configurable
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import IPython.utils.io
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from IPython.testing import decorators as testdec
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from IPython.utils.io import ask_yes_no
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from IPython.utils.traitlets import Bool, Dict, Instance, Int, List, Unicode
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from IPython.utils.warn import warn
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#-----------------------------------------------------------------------------
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# Classes and functions
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#-----------------------------------------------------------------------------
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class HistoryManager(Configurable):
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"""A class to organize all history-related functionality in one place.
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"""
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# Public interface
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# An instance of the IPython shell we are attached to
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shell = Instance('IPython.core.interactiveshell.InteractiveShellABC')
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# Lists to hold processed and raw history. These start with a blank entry
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# so that we can index them starting from 1
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input_hist_parsed = List([""])
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input_hist_raw = List([""])
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# A list of directories visited during session
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dir_hist = List()
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# A dict of output history, keyed with ints from the shell's execution count
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output_hist = Dict()
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# String holding the path to the history file
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hist_file = Unicode()
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# The SQLite database
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db = Instance(sqlite3.Connection)
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# The number of the current session in the history database
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session_number = Int()
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# Should we log output to the database? (default no)
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db_log_output = Bool(False, config=True)
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# Write to database every x commands (higher values save disk access & power)
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# Values of 1 or less effectively disable caching.
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db_cache_size = Int(0, config=True)
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# The input and output caches
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db_input_cache = List()
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db_output_cache = List()
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# Private interface
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# Variables used to store the three last inputs from the user. On each new
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# history update, we populate the user's namespace with these, shifted as
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# necessary.
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_i00, _i, _ii, _iii = '','','',''
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# A set with all forms of the exit command, so that we don't store them in
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# the history (it's annoying to rewind the first entry and land on an exit
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# call).
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_exit_commands = None
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def __init__(self, shell, config=None):
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"""Create a new history manager associated with a shell instance.
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"""
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# We need a pointer back to the shell for various tasks.
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super(HistoryManager, self).__init__(shell=shell, config=config)
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# list of visited directories
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try:
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self.dir_hist = [os.getcwd()]
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except OSError:
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self.dir_hist = []
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# Now the history file
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if shell.profile:
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histfname = 'history-%s' % shell.profile
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else:
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histfname = 'history'
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self.hist_file = os.path.join(shell.ipython_dir, histfname + '.sqlite')
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self.init_db()
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self._i00, self._i, self._ii, self._iii = '','','',''
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self._exit_commands = set(['Quit', 'quit', 'Exit', 'exit', '%Quit',
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'%quit', '%Exit', '%exit'])
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def init_db(self):
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self.db = sqlite3.connect(self.hist_file)
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self.db.execute("""CREATE TABLE IF NOT EXISTS history
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(session integer, line integer, source text, source_raw text,
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PRIMARY KEY (session, line))""")
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# Output history is optional, but ensure the table's there so it can be
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# enabled later.
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self.db.execute("""CREATE TABLE IF NOT EXISTS output_history
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(session integer, line integer, output text,
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PRIMARY KEY (session, line))""")
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cur = self.db.execute("""SELECT name FROM sqlite_master WHERE
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type='table' AND name='singletons'""")
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if not cur.fetchone():
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self.db.execute("""CREATE TABLE singletons
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(name text PRIMARY KEY, value)""")
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self.db.execute("""INSERT INTO singletons VALUES
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('session_number', 1)""")
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self.db.commit()
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cur = self.db.execute("""SELECT value FROM singletons WHERE
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name='session_number'""")
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self.session_number = cur.fetchone()[0]
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#Increment by one for next session.
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self.db.execute("""UPDATE singletons SET value=? WHERE
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name='session_number'""", (self.session_number+1,))
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self.db.commit()
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def get_hist_tail(self, n=10, raw=True):
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"""Get the last n lines from the history database."""
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toget = 'source_raw' if raw else 'source'
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cur = self.db.execute("SELECT session, line, " + toget +\
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" FROM history ORDER BY session DESC, line DESC LIMIT ?""", (n,))
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return reversed(cur.fetchall())
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def get_hist_search(self, pattern="*", raw=True):
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"""Search the database using unix glob-style matching (wildcards * and
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?, escape using \).
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Returns
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-------
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An iterator over tuples: (session, line_number, command)
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"""
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toget = "source_raw" if raw else source
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return self.db.execute("SELECT session, line, " +toget+ \
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"FROM history WHERE" +toget+ "GLOB ?", (pattern,))
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def _get_hist_session(self, start=1, stop=None, raw=True, output=False):
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"""Get input and output history from the current session. Called by
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get_history, and takes similar parameters."""
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input_hist = self.input_hist_raw if raw else self.input_hist_parsed
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n = len(input_hist)
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if start < 0:
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start += n
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if not stop:
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stop = n
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elif stop < 0:
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stop += n
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for i in range(start, stop):
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if output:
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line = (input_hist[i], self.output_hist.get(i))
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else:
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line = input_hist[i]
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yield (0, i, line)
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def get_history(self, session=0, start=1, stop=None, raw=True,output=False):
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"""Retrieve input by session.
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Parameters
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----------
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session : int
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Session number to retrieve. The current session is 0, and negative
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numbers count back from current session, so -1 is previous session.
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start : int
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First line to retrieve.
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stop : int
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Last line to retrieve. If None, retrieve to the end of the session.
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raw : bool
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If True, return untranslated input
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output : bool
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If True, attempt to include output. This will be 'real' Python
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objects for the current session, or text reprs from previous
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sessions if db_log_output was enabled at the time. Where no output
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is found, None is used.
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Returns
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-------
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An iterator over the desired lines. Each line is a 3-tuple, either
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(session, line, input) if output is False, or
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(session, line, (input, output)) if output is True.
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"""
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if session == 0 or session==self.session_number: # Current session
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return self._get_hist_session(start, stop, raw, output)
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if session < 0:
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session += self.session_number
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# Assemble the SQL query:
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sqlfrom = "history"
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toget = 'source_raw' if raw else 'source'
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if output:
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sqlfrom = "history LEFT JOIN output_history USING (session, line)"
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toget = "history.%s, output_history.output" % toget
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if stop:
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lineclause = "line BETWEEN ? and ?"
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params = (session, start, stop)
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else:
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lineclause = "line>=?"
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params = (session, start)
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cur = self.db.execute("SELECT %s FROM %s WHERE session==? AND %s"\
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%(toget, sqlfrom, lineclause), params)
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if output: # Regroup into 3-tuples
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return ((ses, lin (inp, out)) for ses, lin, inp, out in cur)
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return cur
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def get_hist_from_rangestr(self, rangestr, raw=True, output=False):
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"""Get lines of history from a string of ranges, as used by magic
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commands %hist, %save, %macro, etc."""
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for parts in extract_hist_ranges(rangestr):
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for line in self.get_history(*parts, raw=raw, output=output):
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yield line
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def store_inputs(self, line_num, source, source_raw=None):
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"""Store source and raw input in history and create input cache
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variables _i*.
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Parameters
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----------
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line_num : int
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The prompt number of this input.
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source : str
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Python input.
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source_raw : str, optional
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If given, this is the raw input without any IPython transformations
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applied to it. If not given, ``source`` is used.
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"""
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if source_raw is None:
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source_raw = source
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# do not store exit/quit commands
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if source_raw.strip() in self._exit_commands:
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return
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self.input_hist_parsed.append(source.rstrip())
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self.input_hist_raw.append(source_raw.rstrip())
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self.db_input_cache.append((self.session_number, line_num,
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source, source_raw))
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# Trigger to flush cache and write to DB.
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if len(self.db_input_cache) >= self.db_cache_size:
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self.writeout_cache()
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# update the auto _i variables
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self._iii = self._ii
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self._ii = self._i
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self._i = self._i00
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self._i00 = source_raw
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# hackish access to user namespace to create _i1,_i2... dynamically
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new_i = '_i%s' % line_num
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to_main = {'_i': self._i,
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'_ii': self._ii,
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'_iii': self._iii,
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new_i : self._i00 }
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self.shell.user_ns.update(to_main)
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def store_output(self, line_num, output):
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if not self.db_log_output:
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return
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db_row = (self.session_number, line_num, output)
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if self.db_cache_size > 1:
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self.db_output_cache.append(db_row)
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else:
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with self.db:
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self.db.execute("INSERT INTO output_history VALUES (?,?,?)", db_row)
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def writeout_cache(self):
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with self.db:
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self.db.executemany("INSERT INTO history VALUES (?, ?, ?, ?)",
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self.db_input_cache)
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self.db.executemany("INSERT INTO output_history VALUES (?, ?, ?)",
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self.db_output_cache)
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self.db_input_cache = []
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self.db_output_cache = []
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def sync_inputs(self):
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"""Ensure raw and translated histories have same length."""
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lr = len(self.input_hist_raw)
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lp = len(self.input_hist_parsed)
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if lp < lr:
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self.input_hist_raw[:lr-lp] = []
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elif lr < lp:
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self.input_hist_parsed[:lp-lr] = []
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def reset(self):
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"""Clear all histories managed by this object."""
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self.input_hist_parsed[:] = []
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self.input_hist_raw[:] = []
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self.output_hist.clear()
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# The directory history can't be completely empty
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self.dir_hist[:] = [os.getcwd()]
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# To match, e.g. ~5#8-~2#3
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range_re = re.compile(r"""
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((?P<startsess>~?\d+)\#)?
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(?P<start>\d+) # Only the start line num is compulsory
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((?P<sep>[\-:])
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((?P<endsess>~?\d+)\#)?
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(?P<end>\d+))?
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""", re.VERBOSE)
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def extract_hist_ranges(ranges_str):
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"""Turn a string of history ranges into 3-tuples of (session, start, stop).
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Examples
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--------
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list(extract_input_ranges("~8#5-~7#4 2"))
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[(-8, 5, None), (-7, 1, 4), (0, 2, 3)]
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"""
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print(ranges_str)
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for range_str in ranges_str.split():
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rmatch = range_re.match(range_str)
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start = int(rmatch.group("start"))
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end = rmatch.group("end")
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end = int(end) if end else start+1 # If no end specified, get (a, a+1)
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if rmatch.group("sep") == "-": # 1-3 == 1:4 --> [1, 2, 3]
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end += 1
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startsess = rmatch.group("startsess") or "0"
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endsess = rmatch.group("endsess") or startsess
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startsess = int(startsess.replace("~","-"))
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endsess = int(endsess.replace("~","-"))
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assert endsess >= startsess
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if endsess == startsess:
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yield (startsess, start, end)
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continue
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# Multiple sessions in one range:
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yield (startsess, start, None)
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for sess in range(startsess+1, endsess):
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yield (sess, 1, None)
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yield (endsess, 1, end)
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def _format_lineno(session, line):
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"""Helper function to format line numbers properly."""
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if session == 0:
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return str(line)
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return "%s#%s" % (session, line)
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@testdec.skip_doctest
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def magic_history(self, parameter_s = ''):
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"""Print input history (_i<n> variables), with most recent last.
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%history -> print at most 40 inputs (some may be multi-line)\\
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%history n -> print at most n inputs\\
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%history n1 n2 -> print inputs between n1 and n2 (n2 not included)\\
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By default, input history is printed without line numbers so it can be
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directly pasted into an editor.
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With -n, each input's number <n> is shown, and is accessible as the
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automatically generated variable _i<n> as well as In[<n>]. Multi-line
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statements are printed starting at a new line for easy copy/paste.
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Options:
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-n: print line numbers for each input.
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This feature is only available if numbered prompts are in use.
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-o: also print outputs for each input.
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-p: print classic '>>>' python prompts before each input. This is useful
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for making documentation, and in conjunction with -o, for producing
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doctest-ready output.
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-r: (default) print the 'raw' history, i.e. the actual commands you typed.
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-t: print the 'translated' history, as IPython understands it. IPython
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filters your input and converts it all into valid Python source before
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executing it (things like magics or aliases are turned into function
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calls, for example). With this option, you'll see the native history
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instead of the user-entered version: '%cd /' will be seen as
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'get_ipython().magic("%cd /")' instead of '%cd /'.
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-g: treat the arg as a pattern to grep for in (full) history.
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This includes the saved history (almost all commands ever written).
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Use '%hist -g' to show full saved history (may be very long).
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-l: get the last n lines from all sessions. Specify n as a single arg, or
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the default is the last 10 lines.
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-f FILENAME: instead of printing the output to the screen, redirect it to
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the given file. The file is always overwritten, though IPython asks for
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confirmation first if it already exists.
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Examples
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--------
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::
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In [6]: %hist -n 4 6
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4:a = 12
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5:print a**2
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"""
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if not self.shell.displayhook.do_full_cache:
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print('This feature is only available if numbered prompts are in use.')
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return
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opts,args = self.parse_options(parameter_s,'noprtglf:',mode='string')
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# For brevity
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history_manager = self.shell.history_manager
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# Check if output to specific file was requested.
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try:
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outfname = opts['f']
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except KeyError:
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outfile = IPython.utils.io.Term.cout # default
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# We don't want to close stdout at the end!
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close_at_end = False
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else:
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|
|
if os.path.exists(outfname):
|
|
|
if not ask_yes_no("File %r exists. Overwrite?" % outfname):
|
|
|
print('Aborting.')
|
|
|
return
|
|
|
|
|
|
outfile = open(outfname,'w')
|
|
|
close_at_end = True
|
|
|
|
|
|
print_nums = 'n' in opts
|
|
|
get_output = 'o' in opts
|
|
|
pyprompts = 'p' in opts
|
|
|
# Raw history is the default
|
|
|
raw = not('t' in opts)
|
|
|
|
|
|
default_length = 40
|
|
|
pattern = None
|
|
|
|
|
|
# Glob search:
|
|
|
if 'g' in opts:
|
|
|
pattern = "*" + args + "*" if args else "*"
|
|
|
|
|
|
# Display:
|
|
|
matches_current_session = []
|
|
|
for session, line, s in history_manager.get_hist_search(pattern, raw):
|
|
|
if session == history_manager.session_number:
|
|
|
matches_current_session.append(line, s)
|
|
|
continue
|
|
|
print("%d#%d: %s" %(session, line, s.expandtabs(4)), file=outfile)
|
|
|
if matches_current_session:
|
|
|
print("=== Current session: ===", file=outfile)
|
|
|
for line, s in matches_current_session:
|
|
|
print("%d: %s" %(line, s.expandtabs(4)), file=outfile)
|
|
|
return
|
|
|
|
|
|
if 'l' in opts: # Get 'tail'
|
|
|
try:
|
|
|
n = int(args)
|
|
|
except ValueError, IndexError:
|
|
|
n = 10
|
|
|
hist = history_manager.get_hist_tail(n, raw=raw)
|
|
|
else:
|
|
|
if args: # Get history by ranges
|
|
|
hist = history_manager.get_hist_from_rangestr(args, raw, get_output)
|
|
|
else: # Just get history for the current session
|
|
|
hist = history_manager.get_history(raw=raw, output=get_output)
|
|
|
# Pull hist into a list, so we can get the widest number in it.
|
|
|
hist = list(hist)
|
|
|
|
|
|
width = max(len(_format_lineno(s, l)) for s, l, _ in hist)
|
|
|
|
|
|
for session, lineno, inline in hist:
|
|
|
# Print user history with tabs expanded to 4 spaces. The GUI clients
|
|
|
# use hard tabs for easier usability in auto-indented code, but we want
|
|
|
# to produce PEP-8 compliant history for safe pasting into an editor.
|
|
|
if get_output:
|
|
|
inline, output = inline
|
|
|
inline = inline.expandtabs(4).rstrip()
|
|
|
|
|
|
if pattern is not None and not fnmatch.fnmatch(inline, pattern):
|
|
|
continue
|
|
|
|
|
|
multiline = "\n" in inline
|
|
|
line_sep = '\n' if multiline else ''
|
|
|
if print_nums:
|
|
|
print('%s:%s' % (_format_lineno(session, lineno).ljust(width),
|
|
|
line_sep[multiline]), file=outfile, end='')
|
|
|
if pyprompts:
|
|
|
print(">>> ", end="", file=outfile)
|
|
|
if multiline:
|
|
|
inline = "\n... ".join(inline.splitlines()) + "\n..."
|
|
|
print(inline, file=outfile)
|
|
|
if get_output and output:
|
|
|
print(repr(output), file=outfile)
|
|
|
|
|
|
if close_at_end:
|
|
|
outfile.close()
|
|
|
|
|
|
# %hist is an alternative name
|
|
|
magic_hist = magic_history
|
|
|
|
|
|
|
|
|
def rep_f(self, arg):
|
|
|
r""" Repeat a command, or get command to input line for editing
|
|
|
|
|
|
- %rep (no arguments):
|
|
|
|
|
|
Place a string version of last computation result (stored in the special '_'
|
|
|
variable) to the next input prompt. Allows you to create elaborate command
|
|
|
lines without using copy-paste::
|
|
|
|
|
|
$ l = ["hei", "vaan"]
|
|
|
$ "".join(l)
|
|
|
==> heivaan
|
|
|
$ %rep
|
|
|
$ heivaan_ <== cursor blinking
|
|
|
|
|
|
%rep 45
|
|
|
|
|
|
Place history line 45 to next input prompt. Use %hist to find out the
|
|
|
number.
|
|
|
|
|
|
%rep 1-4 6-7 3
|
|
|
|
|
|
Repeat the specified lines immediately. Input slice syntax is the same as
|
|
|
in %macro and %save.
|
|
|
|
|
|
%rep foo
|
|
|
|
|
|
Place the most recent line that has the substring "foo" to next input.
|
|
|
(e.g. 'svn ci -m foobar').
|
|
|
"""
|
|
|
|
|
|
opts,args = self.parse_options(arg,'',mode='list')
|
|
|
if not args:
|
|
|
self.set_next_input(str(self.shell.user_ns["_"]))
|
|
|
return
|
|
|
|
|
|
if len(args) == 1 and not '-' in args[0]:
|
|
|
arg = args[0]
|
|
|
if len(arg) > 1 and arg.startswith('0'):
|
|
|
# get from shadow hist
|
|
|
num = int(arg[1:])
|
|
|
line = self.shell.shadowhist.get(num)
|
|
|
self.set_next_input(str(line))
|
|
|
return
|
|
|
try:
|
|
|
num = int(args[0])
|
|
|
self.set_next_input(str(self.shell.input_hist_raw[num]).rstrip())
|
|
|
return
|
|
|
except ValueError:
|
|
|
pass
|
|
|
|
|
|
for h in reversed(self.shell.input_hist_raw):
|
|
|
if 'rep' in h:
|
|
|
continue
|
|
|
if fnmatch.fnmatch(h,'*' + arg + '*'):
|
|
|
self.set_next_input(str(h).rstrip())
|
|
|
return
|
|
|
|
|
|
try:
|
|
|
lines = self.extract_input_slices(args, True)
|
|
|
print("lines", lines)
|
|
|
self.run_cell(lines)
|
|
|
except ValueError:
|
|
|
print("Not found in recent history:", args)
|
|
|
|
|
|
|
|
|
def init_ipython(ip):
|
|
|
ip.define_magic("rep",rep_f)
|
|
|
ip.define_magic("hist",magic_hist)
|
|
|
ip.define_magic("history",magic_history)
|
|
|
|
|
|
# XXX - ipy_completers are in quarantine, need to be updated to new apis
|
|
|
#import ipy_completers
|
|
|
#ipy_completers.quick_completer('%hist' ,'-g -t -r -n')
|
|
|
|
