djavu-asus/emacs/elpy/rpc-venv/lib/python3.11/site-packages/jedi/utils.py

   1 """
   2 Utilities for end-users.
   3 """
   4
   5 import __main__
   6 from collections import namedtuple
   7 import logging
   8 import traceback
   9 import re
  10 import os
  11 import sys
  12
  13 from jedi import Interpreter
  14
  15
  16 READLINE_DEBUG = False
  17
  18
  19 def setup_readline(namespace_module=__main__, fuzzy=False):
  20     """
  21     This function sets up :mod:`readline` to use Jedi in a Python interactive
  22     shell.
  23
  24     If you want to use a custom ``PYTHONSTARTUP`` file (typically
  25     ``$HOME/.pythonrc.py``), you can add this piece of code::
  26
  27         try:
  28             from jedi.utils import setup_readline
  29         except ImportError:
  30             # Fallback to the stdlib readline completer if it is installed.
  31             # Taken from http://docs.python.org/2/library/rlcompleter.html
  32             print("Jedi is not installed, falling back to readline")
  33             try:
  34                 import readline
  35                 import rlcompleter
  36                 readline.parse_and_bind("tab: complete")
  37             except ImportError:
  38                 print("Readline is not installed either. No tab completion is enabled.")
  39         else:
  40             setup_readline()
  41
  42     This will fallback to the readline completer if Jedi is not installed.
  43     The readline completer will only complete names in the global namespace,
  44     so for example::
  45
  46         ran<TAB>
  47
  48     will complete to ``range``.
  49
  50     With Jedi the following code::
  51
  52         range(10).cou<TAB>
  53
  54     will complete to ``range(10).count``, this does not work with the default
  55     cPython :mod:`readline` completer.
  56
  57     You will also need to add ``export PYTHONSTARTUP=$HOME/.pythonrc.py`` to
  58     your shell profile (usually ``.bash_profile`` or ``.profile`` if you use
  59     bash).
  60     """
  61     if READLINE_DEBUG:
  62         logging.basicConfig(
  63             filename='/tmp/jedi.log',
  64             filemode='a',
  65             level=logging.DEBUG
  66         )
  67
  68     class JediRL:
  69         def complete(self, text, state):
  70             """
  71             This complete stuff is pretty weird, a generator would make
  72             a lot more sense, but probably due to backwards compatibility
  73             this is still the way how it works.
  74
  75             The only important part is stuff in the ``state == 0`` flow,
  76             everything else has been copied from the ``rlcompleter`` std.
  77             library module.
  78             """
  79             if state == 0:
  80                 sys.path.insert(0, os.getcwd())
  81                 # Calling python doesn't have a path, so add to sys.path.
  82                 try:
  83                     logging.debug("Start REPL completion: " + repr(text))
  84                     interpreter = Interpreter(text, [namespace_module.__dict__])
  85
  86                     completions = interpreter.complete(fuzzy=fuzzy)
  87                     logging.debug("REPL completions: %s", completions)
  88
  89                     self.matches = [
  90                         text[:len(text) - c._like_name_length] + c.name_with_symbols
  91                         for c in completions
  92                     ]
  93                 except:
  94                     logging.error("REPL Completion error:\n" + traceback.format_exc())
  95                     raise
  96                 finally:
  97                     sys.path.pop(0)
  98             try:
  99                 return self.matches[state]
 100             except IndexError:
 101                 return None
 102
 103     try:
 104         # Need to import this one as well to make sure it's executed before
 105         # this code. This didn't use to be an issue until 3.3. Starting with
 106         # 3.4 this is different, it always overwrites the completer if it's not
 107         # already imported here.
 108         import rlcompleter  # noqa: F401
 109         import readline
 110     except ImportError:
 111         print("Jedi: Module readline not available.")
 112     else:
 113         readline.set_completer(JediRL().complete)
 114         readline.parse_and_bind("tab: complete")
 115         # jedi itself does the case matching
 116         readline.parse_and_bind("set completion-ignore-case on")
 117         # because it's easier to hit the tab just once
 118         readline.parse_and_bind("set show-all-if-unmodified")
 119         readline.parse_and_bind("set show-all-if-ambiguous on")
 120         # don't repeat all the things written in the readline all the time
 121         readline.parse_and_bind("set completion-prefix-display-length 2")
 122         # No delimiters, Jedi handles that.
 123         readline.set_completer_delims('')
 124
 125
 126 def version_info():
 127     """
 128     Returns a namedtuple of Jedi's version, similar to Python's
 129     ``sys.version_info``.
 130     """
 131     Version = namedtuple('Version', 'major, minor, micro')
 132     from jedi import __version__
 133     tupl = re.findall(r'[a-z]+|\d+', __version__)
 134     return Version(*[x if i == 3 else int(x) for i, x in enumerate(tupl)])