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"""Definitions used by commands sent to inferior Python in python.el."""
# Copyright (C) 2004-2011 Free Software Foundation, Inc.
# Author: Dave Love <fx@gnu.org>
# This file is part of GNU Emacs.
# GNU Emacs is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# GNU Emacs is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
import os, sys, traceback, inspect, __main__
try:
set
except:
from sets import Set as set
__all__ = ["eexecfile", "eargs", "complete", "ehelp", "eimport", "modpath"]
def format_exception (filename, should_remove_self):
type, value, tb = sys.exc_info ()
sys.last_type = type
sys.last_value = value
sys.last_traceback = tb
if type is SyntaxError:
try: # parse the error message
msg, (dummy_filename, lineno, offset, line) = value
except:
pass # Not the format we expect; leave it alone
else:
# Stuff in the right filename
value = SyntaxError(msg, (filename, lineno, offset, line))
sys.last_value = value
res = traceback.format_exception_only (type, value)
# There are some compilation errors which do not provide traceback so we
# should not massage it.
if should_remove_self:
tblist = traceback.extract_tb (tb)
del tblist[:1]
res = traceback.format_list (tblist)
if res:
res.insert(0, "Traceback (most recent call last):\n")
res[len(res):] = traceback.format_exception_only (type, value)
# traceback.print_exception(type, value, tb)
for line in res: print line,
def eexecfile (file):
"""Execute FILE and then remove it.
Execute the file within the __main__ namespace.
If we get an exception, print a traceback with the top frame
(ourselves) excluded."""
# We cannot use real execfile since it has a bug where the file stays
# locked forever (under w32) if SyntaxError occurs.
# --- code based on code.py and PyShell.py.
try:
try:
source = open (file, "r").read()
code = compile (source, file, "exec")
# Other exceptions (shouldn't be any...) will (correctly) fall
# through to "final".
except (OverflowError, SyntaxError, ValueError):
# FIXME: When can compile() raise anything else than
# SyntaxError ????
format_exception (file, False)
return
try:
exec code in __main__.__dict__
except:
format_exception (file, True)
finally:
os.remove (file)
def eargs (name, imports):
"Get arglist of NAME for Eldoc &c."
try:
if imports: exec imports
parts = name.split ('.')
if len (parts) > 1:
exec 'import ' + parts[0] # might fail
func = eval (name)
if inspect.isbuiltin (func) or type(func) is type:
doc = func.__doc__
if doc.find (' ->') != -1:
print '_emacs_out', doc.split (' ->')[0]
else:
print '_emacs_out', doc.split ('\n')[0]
return
if inspect.ismethod (func):
func = func.im_func
if not inspect.isfunction (func):
print '_emacs_out '
return
(args, varargs, varkw, defaults) = inspect.getargspec (func)
# No space between name and arglist for consistency with builtins.
print '_emacs_out', \
func.__name__ + inspect.formatargspec (args, varargs, varkw,
defaults)
except:
print "_emacs_out "
def all_names (object):
"""Return (an approximation to) a list of all possible attribute
names reachable via the attributes of OBJECT, i.e. roughly the
leaves of the dictionary tree under it."""
def do_object (object, names):
if inspect.ismodule (object):
do_module (object, names)
elif inspect.isclass (object):
do_class (object, names)
# Might have an object without its class in scope.
elif hasattr (object, '__class__'):
names.add ('__class__')
do_class (object.__class__, names)
# Probably not a good idea to try to enumerate arbitrary
# dictionaries...
return names
def do_module (module, names):
if hasattr (module, '__all__'): # limited export list
names.update(module.__all__)
for i in module.__all__:
do_object (getattr (module, i), names)
else: # use all names
names.update(dir (module))
for i in dir (module):
do_object (getattr (module, i), names)
return names
def do_class (object, names):
ns = dir (object)
names.update(ns)
if hasattr (object, '__bases__'): # superclasses
for i in object.__bases__: do_object (i, names)
return names
return do_object (object, set([]))
def complete (name, imports):
"""Complete TEXT in NAMESPACE and print a Lisp list of completions.
Exec IMPORTS first."""
import __main__, keyword
def class_members(object):
names = dir (object)
if hasattr (object, '__bases__'):
for super in object.__bases__:
names = class_members (super)
return names
names = set([])
base = None
try:
dict = __main__.__dict__.copy()
if imports: exec imports in dict
l = len (name)
if not "." in name:
for src in [dir (__builtins__), keyword.kwlist, dict.keys()]:
for elt in src:
if elt[:l] == name: names.add(elt)
else:
base = name[:name.rfind ('.')]
name = name[name.rfind('.')+1:]
try:
object = eval (base, dict)
names = set(dir (object))
if hasattr (object, '__class__'):
names.add('__class__')
names.update(class_members (object))
except: names = all_names (dict)
except:
print sys.exc_info()
names = []
l = len(name)
print '_emacs_out (',
for n in names:
if name == n[:l]:
if base: print '"%s.%s"' % (base, n),
else: print '"%s"' % n,
print ')'
def ehelp (name, imports):
"""Get help on string NAME.
First try to eval name for, e.g. user definitions where we need
the object. Otherwise try the string form."""
locls = {}
if imports:
try: exec imports in locls
except: pass
try: help (eval (name, globals(), locls))
except: help (name)
def eimport (mod, dir):
"""Import module MOD with directory DIR at the head of the search path.
NB doesn't load from DIR if MOD shadows a system module."""
from __main__ import __dict__
path0 = sys.path[0]
sys.path[0] = dir
try:
try:
if __dict__.has_key(mod) and inspect.ismodule (__dict__[mod]):
reload (__dict__[mod])
else:
__dict__[mod] = __import__ (mod)
except:
(type, value, tb) = sys.exc_info ()
print "Traceback (most recent call last):"
traceback.print_exception (type, value, tb.tb_next)
finally:
sys.path[0] = path0
def modpath (module):
"""Return the source file for the given MODULE (or None).
Assumes that MODULE.py and MODULE.pyc are in the same directory."""
try:
path = __import__ (module).__file__
if path[-4:] == '.pyc' and os.path.exists (path[0:-1]):
path = path[:-1]
print "_emacs_out", path
except:
print "_emacs_out ()"
# print '_emacs_ok' # ready for input and can call continuation
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