Attachment 'sage_emacs.py'
Download 1 """Definitions used by commands sent to inferior Python in python.el."""
2
3 # Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
4 # Author: Dave Love <fx@gnu.org>
5
6 # This file is part of GNU Emacs.
7
8 # GNU Emacs is free software; you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation; either version 2, or (at your option)
11 # any later version.
12
13 # GNU Emacs is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
17
18 # You should have received a copy of the GNU General Public License
19 # along with GNU Emacs; see the file COPYING. If not, write to the
20 # Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 # Boston, MA 02110-1301, USA.
22
23 import os, sys, traceback, inspect, __main__
24 from sets import Set
25 import xreload
26
27 __all__ = ["eexecfile", "eargs", "complete", "ehelp", "eimport", "modpath"]
28
29 # Don't kill debug setting if it has been specified
30 try:
31 _emacs_py_debug
32 except:
33 _emacs_py_debug = True
34
35 # Don't kill xreload setting if it has been specified
36 try:
37 _emacs_py_xreload
38 except:
39 _emacs_py_xreload = False
40
41 def eexecfile (file):
42 """Execute FILE and then remove it.
43 Execute the file within the __main__ namespace.
44 If we get an exception, print a traceback with the top frame
45 (ourselves) excluded."""
46 try:
47 try: execfile (file, __main__.__dict__)
48 except:
49 (type, value, tb) = sys.exc_info ()
50 # Lose the stack frame for this location.
51 tb = tb.tb_next
52 if tb is None: # print_exception won't do it
53 print "Traceback (most recent call last):"
54 traceback.print_exception (type, value, tb)
55 finally:
56 os.remove (file)
57
58 def eargs (name, imports):
59 "Get arglist of NAME for Eldoc &c."
60 try:
61 if imports: exec imports
62 parts = name.split ('.')
63 if len (parts) > 1:
64 exec 'import ' + parts[0] # might fail
65 func = eval (name)
66 if inspect.isbuiltin (func) or type(func) is type:
67 doc = func.__doc__
68 if doc.find (' ->') != -1:
69 print '_emacs_out', doc.split (' ->')[0]
70 else:
71 print '_emacs_out', doc.split ('\n')[0]
72 return
73 if inspect.ismethod (func):
74 func = func.im_func
75 if not inspect.isfunction (func):
76 print '_emacs_out '
77 return
78 (args, varargs, varkw, defaults) = inspect.getargspec (func)
79 # No space between name and arglist for consistency with builtins.
80 print '_emacs_out', \
81 func.__name__ + inspect.formatargspec (args, varargs, varkw,
82 defaults)
83 except:
84 print "_emacs_out "
85
86 def all_names (object):
87 """Return (an approximation to) a list of all possible attribute
88 names reachable via the attributes of OBJECT, i.e. roughly the
89 leaves of the dictionary tree under it."""
90
91 def do_object (object, names):
92 if inspect.ismodule (object):
93 do_module (object, names)
94 elif inspect.isclass (object):
95 do_class (object, names)
96 # Might have an object without its class in scope.
97 elif hasattr (object, '__class__'):
98 names.add ('__class__')
99 do_class (object.__class__, names)
100 # Probably not a good idea to try to enumerate arbitrary
101 # dictionaries...
102 return names
103
104 def do_module (module, names):
105 if hasattr (module, '__all__'): # limited export list
106 names.union_update (module.__all__)
107 for i in module.__all__:
108 do_object (getattr (module, i), names)
109 else: # use all names
110 names.union_update (dir (module))
111 for i in dir (module):
112 do_object (getattr (module, i), names)
113 return names
114
115 def do_class (object, names):
116 ns = dir (object)
117 names.union_update (ns)
118 if hasattr (object, '__bases__'): # superclasses
119 for i in object.__bases__: do_object (i, names)
120 return names
121
122 return do_object (object, Set ([]))
123
124 def ipython_complete (name, imports=None):
125 """Complete NAME using IPython and print a Lisp list of completions.
126 IMPORTS is ignored at this time; kepy for compatibility with complete.
127 """
128 try:
129 import __main__
130 names = __main__.__IP.Completer.all_completions(name)
131 except NameError:
132 print "_emacs_out ()"
133
134 print '_emacs_out (',
135 for n in names:
136 print '"%s"' % n,
137 print ')'
138
139 def complete (name, imports):
140 """Complete TEXT in NAMESPACE and print a Lisp list of completions.
141 Exec IMPORTS first."""
142 import __main__, keyword
143
144 def class_members(object):
145 names = dir (object)
146 if hasattr (object, '__bases__'):
147 for super in object.__bases__:
148 names = class_members (super)
149 return names
150
151 names = Set ([])
152 base = None
153 try:
154 dict = __main__.__dict__.copy()
155 if imports: exec imports in dict
156 l = len (name)
157 if not "." in name:
158 for list in [dir (__builtins__), keyword.kwlist, dict.keys()]:
159 for elt in list:
160 if elt[:l] == name: names.add(elt)
161 else:
162 base = name[:name.rfind ('.')]
163 name = name[name.rfind('.')+1:]
164 try:
165 object = eval (base, dict)
166 names = Set (dir (object))
167 if hasattr (object, '__class__'):
168 names.add('__class__')
169 names.union_update (class_members (object))
170 except: names = all_names (dict)
171 except: return []
172 l = len(name)
173 print '_emacs_out (',
174 for n in names:
175 if name == n[:l]:
176 if base: print '"%s.%s"' % (base, n),
177 else: print '"%s"' % n,
178 print ')'
179
180 def ehelp (name, imports):
181 """Get help on string NAME.
182 First try to eval name for, e.g. user definitions where we need
183 the object. Otherwise try the string form."""
184 locls = {}
185 if imports:
186 try: exec imports in locls
187 except: pass
188 try: help (eval (name, globals(), locls))
189 except: help (name)
190
191 def eimport (modname, dir, use_xreload=False):
192 """Import module MODNAME from directory DIR at the head of the search path.
193 NB doesn't load from DIR if MODNAME shadows a system module."""
194 from __main__ import __dict__
195
196 if _emacs_py_debug:
197 print "Loading module %r from directory %r" % (modname, dir)
198
199 old_path = sys.path
200 sys.path = [dir] # XXX for now + sys.path
201 try:
202 if True: # try:
203 already_loaded = False
204 try:
205 # easiest way to peel back the package structure
206 # print len(__dict__.keys())
207 mod = eval(modname, __dict__)
208 already_loaded = True
209 except:
210 print "ACK!"
211 already_loaded = False
212
213 if already_loaded:
214 if use_xreload or _emacs_py_xreload:
215 if _emacs_py_debug:
216 print "xreload-ing %s" % mod
217 xreload.xreload (mod, path=[dir])
218 else:
219 if _emacs_py_debug:
220 print "reload-ing %s" % mod
221 reload (mod)
222 else:
223 if _emacs_py_debug:
224 print "__import__(%r)" % modname
225 from __main__ import __dict__
226 __dict__[modname] = __import__ (modname)
227 # except:
228 # traceback.print_exc()
229 # raise
230 finally:
231 sys.path = old_path
232
233 def modpath (module):
234 """Return the source file for the given MODULE (or None).
235 Assumes that MODULE.py and MODULE.pyc are in the same directory."""
236 try:
237 path = __import__ (module).__file__
238 if path[-4:] == '.pyc' and os.path.exists (path[0:-1]):
239 path = path[:-1]
240 print "_emacs_out", path
241 except:
242 print "_emacs_out ()"
243
244 # print '_emacs_ok' # ready for input and can call continuation
245
246 # arch-tag: d90408f3-90e2-4de4-99c2-6eb9c7b9ca46
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