etc/emacs3.py

   1 """
   2 Warning: This file is automatically generated from emacs2.py with the
   3 2to3 script.  Do not hand edit.
   4 """
   5
   6 """Definitions used by commands sent to inferior Python in python.el."""
   7
   8 # Copyright (C) 2004, 2005, 2006, 2007, 2008  Free Software Foundation, Inc.
   9 # Author: Dave Love <fx@gnu.org>
  10
  11 # This file is part of GNU Emacs.
  12
  13 # GNU Emacs is free software: you can redistribute it and/or modify
  14 # it under the terms of the GNU General Public License as published by
  15 # the Free Software Foundation, either version 3 of the License, or
  16 # (at your option) any later version.
  17
  18 # GNU Emacs is distributed in the hope that it will be useful,
  19 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 # GNU General Public License for more details.
  22
  23 # You should have received a copy of the GNU General Public License
  24 # along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  25
  26 import os, sys, traceback, inspect, __main__
  27
  28 try:
  29     set
  30 except:
  31     from sets import Set as set
  32
  33 __all__ = ["eexecfile", "eargs", "complete", "ehelp", "eimport", "modpath"]
  34
  35 def format_exception (filename, should_remove_self):
  36     type, value, tb = sys.exc_info ()
  37     sys.last_type = type
  38     sys.last_value = value
  39     sys.last_traceback = tb
  40     if type is SyntaxError:
  41         try: # parse the error message
  42             msg, (dummy_filename, lineno, offset, line) = value
  43         except:
  44             pass # Not the format we expect; leave it alone
  45         else:
  46             # Stuff in the right filename
  47             value = SyntaxError(msg, (filename, lineno, offset, line))
  48             sys.last_value = value
  49     res = traceback.format_exception_only (type, value)
  50     # There are some compilation errors which do not provide traceback so we
  51     # should not massage it.
  52     if should_remove_self:
  53         tblist = traceback.extract_tb (tb)
  54         del tblist[:1]
  55         res = traceback.format_list (tblist)
  56         if res:
  57             res.insert(0, "Traceback (most recent call last):\n")
  58         res[len(res):] = traceback.format_exception_only (type, value)
  59     # traceback.print_exception(type, value, tb)
  60     for line in res: print(line, end=' ')
  61
  62 def eexecfile (file):
  63     """Execute FILE and then remove it.
  64     Execute the file within the __main__ namespace.
  65     If we get an exception, print a traceback with the top frame
  66     (ourselves) excluded."""
  67     # We cannot use real execfile since it has a bug where the file stays
  68     # locked forever (under w32) if SyntaxError occurs.
  69     # --- code based on code.py and PyShell.py.
  70     try:
  71         try:
  72             source = open (file, "r").read()
  73             code = compile (source, file, "exec")
  74         # Other exceptions (shouldn't be any...) will (correctly) fall
  75         # through to "final".
  76         except (OverflowError, SyntaxError, ValueError):
  77             # FIXME: When can compile() raise anything else than
  78             # SyntaxError ????
  79             format_exception (file, False)
  80             return
  81         try:
  82             exec(code, __main__.__dict__)
  83         except:
  84             format_exception (file, True)
  85     finally:
  86         os.remove (file)
  87
  88 def eargs (name, imports):
  89     "Get arglist of NAME for Eldoc &c."
  90     try:
  91         if imports: exec(imports)
  92         parts = name.split ('.')
  93         if len (parts) > 1:
  94             exec('import ' + parts[0]) # might fail
  95         func = eval (name)
  96         if inspect.isbuiltin (func) or type(func) is type:
  97             doc = func.__doc__
  98             if doc.find (' ->') != -1:
  99                 print('_emacs_out', doc.split (' ->')[0])
 100             else:
 101                 print('_emacs_out', doc.split ('\n')[0])
 102             return
 103         if inspect.ismethod (func):
 104             func = func.im_func
 105         if not inspect.isfunction (func):
 106             print('_emacs_out ')
 107             return
 108         (args, varargs, varkw, defaults) = inspect.getargspec (func)
 109         # No space between name and arglist for consistency with builtins.
 110         print('_emacs_out', \
 111             func.__name__ + inspect.formatargspec (args, varargs, varkw,
 112                                                    defaults))
 113     except:
 114         print("_emacs_out ")
 115
 116 def all_names (object):
 117     """Return (an approximation to) a list of all possible attribute
 118     names reachable via the attributes of OBJECT, i.e. roughly the
 119     leaves of the dictionary tree under it."""
 120
 121     def do_object (object, names):
 122         if inspect.ismodule (object):
 123             do_module (object, names)
 124         elif inspect.isclass (object):
 125             do_class (object, names)
 126         # Might have an object without its class in scope.
 127         elif hasattr (object, '__class__'):
 128             names.add ('__class__')
 129             do_class (object.__class__, names)
 130         # Probably not a good idea to try to enumerate arbitrary
 131         # dictionaries...
 132         return names
 133
 134     def do_module (module, names):
 135         if hasattr (module, '__all__'): # limited export list
 136             names.update(module.__all__)
 137             for i in module.__all__:
 138                 do_object (getattr (module, i), names)
 139         else:                   # use all names
 140             names.update(dir (module))
 141             for i in dir (module):
 142                 do_object (getattr (module, i), names)
 143         return names
 144
 145     def do_class (object, names):
 146         ns = dir (object)
 147         names.update(ns)
 148         if hasattr (object, '__bases__'): # superclasses
 149             for i in object.__bases__: do_object (i, names)
 150         return names
 151
 152     return do_object (object, set([]))
 153
 154 def complete (name, imports):
 155     """Complete TEXT in NAMESPACE and print a Lisp list of completions.
 156     Exec IMPORTS first."""
 157     import __main__, keyword
 158
 159     def class_members(object):
 160         names = dir (object)
 161         if hasattr (object, '__bases__'):
 162             for super in object.__bases__:
 163                 names = class_members (super)
 164         return names
 165
 166     names = set([])
 167     base = None
 168     try:
 169         dict = __main__.__dict__.copy()
 170         if imports: exec(imports, dict)
 171         l = len (name)
 172         if not "." in name:
 173             for src in [dir (__builtins__), keyword.kwlist, list(dict.keys())]:
 174                 for elt in src:
 175                     if elt[:l] == name: names.add(elt)
 176         else:
 177             base = name[:name.rfind ('.')]
 178             name = name[name.rfind('.')+1:]
 179             try:
 180                 object = eval (base, dict)
 181                 names = set(dir (object))
 182                 if hasattr (object, '__class__'):
 183                     names.add('__class__')
 184                     names.update(class_members (object))
 185             except: names = all_names (dict)
 186     except:
 187         print(sys.exc_info())
 188         names = []
 189
 190     l = len(name)
 191     print('_emacs_out (', end=' ')
 192     for n in names:
 193         if name == n[:l]:
 194             if base: print('"%s.%s"' % (base, n), end=' ')
 195             else: print('"%s"' % n, end=' ')
 196     print(')')
 197
 198 def ehelp (name, imports):
 199     """Get help on string NAME.
 200     First try to eval name for, e.g. user definitions where we need
 201     the object.  Otherwise try the string form."""
 202     locls = {}
 203     if imports:
 204         try: exec(imports, locls)
 205         except: pass
 206     try: help (eval (name, globals(), locls))
 207     except: help (name)
 208
 209 def eimport (mod, dir):
 210     """Import module MOD with directory DIR at the head of the search path.
 211     NB doesn't load from DIR if MOD shadows a system module."""
 212     from __main__ import __dict__
 213
 214     path0 = sys.path[0]
 215     sys.path[0] = dir
 216     try:
 217         try:
 218             if mod in __dict__ and inspect.ismodule (__dict__[mod]):
 219                 reload (__dict__[mod])
 220             else:
 221                 __dict__[mod] = __import__ (mod)
 222         except:
 223             (type, value, tb) = sys.exc_info ()
 224             print("Traceback (most recent call last):")
 225             traceback.print_exception (type, value, tb.tb_next)
 226     finally:
 227         sys.path[0] = path0
 228
 229 def modpath (module):
 230     """Return the source file for the given MODULE (or None).
 231 Assumes that MODULE.py and MODULE.pyc are in the same directory."""
 232     try:
 233         path = __import__ (module).__file__
 234         if path[-4:] == '.pyc' and os.path.exists (path[0:-1]):
 235             path = path[:-1]
 236         print("_emacs_out", path)
 237     except:
 238         print("_emacs_out ()")
 239
 240 # print '_emacs_ok'             # ready for input and can call continuation
 241
 242 # arch-tag: 37bfed38-5f4a-4027-a2bf-d5f41819dd89