1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
# Copyright (c) 2009 www.stani.be (GPL license)
# ##### BEGIN GPL LICENSE BLOCK #####
#
# This program 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 2
# of the License, or (at your option) any later version.
#
# This program 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 this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
# <pep8-80 compliant>
import inspect
import re
# regular expression constants
DEF_DOC = '%s\s*(\(.*?\))'
DEF_SOURCE = 'def\s+%s\s*(\(.*?\)):'
RE_EMPTY_LINE = re.compile('^\s*\n')
RE_FLAG = re.MULTILINE | re.DOTALL
RE_NEWLINE = re.compile('\n+')
RE_SPACE = re.compile('\s+')
RE_DEF_COMPLETE = re.compile(
# don't start with a quote
'''(?:^|[^"'a-zA-Z0-9_])'''
# start with a \w = [a-zA-Z0-9_]
'''((\w+'''
# allow also dots and closed bracket pairs []
'''(?:\w|[.]|\[.+?\])*'''
# allow empty string
'''|)'''
# allow opening bracket(s)
'''(?:\(|\s)*)$''')
def reduce_newlines(text):
"""Reduces multiple newlines to a single newline.
:param text: text with multiple newlines
:type text: str
:returns: text with single newlines
:rtype: str
>>> reduce_newlines('hello\\n\\nworld')
'hello\\nworld'
"""
return RE_NEWLINE.sub('\n', text)
def reduce_spaces(text):
"""Reduces multiple whitespaces to a single space.
:param text: text with multiple spaces
:type text: str
:returns: text with single spaces
:rtype: str
>>> reduce_spaces('hello \\nworld')
'hello world'
"""
return RE_SPACE.sub(' ', text)
def get_doc(obj):
"""Get the doc string or comments for an object.
:param object: object
:returns: doc string
:rtype: str
>>> get_doc(abs)
'abs(number) -> number\\n\\nReturn the absolute value of the argument.'
"""
result = inspect.getdoc(obj) or inspect.getcomments(obj)
return result and RE_EMPTY_LINE.sub('', result.rstrip()) or ''
def get_argspec(func, strip_self=True, doc=None, source=None):
"""Get argument specifications.
:param strip_self: strip `self` from argspec
:type strip_self: bool
:param doc: doc string of func (optional)
:type doc: str
:param source: source code of func (optional)
:type source: str
:returns: argument specification
:rtype: str
>>> get_argspec(inspect.getclasstree)
'(classes, unique=0)'
>>> get_argspec(abs)
'(number)'
"""
# get the function object of the class
try:
func = func.__func__
except AttributeError:
try:
# py 2.X
func = func.im_func
except AttributeError:
pass
# is callable?
if not hasattr(func, '__call__'):
return ''
# func should have a name
try:
func_name = func.__name__
except AttributeError:
return ''
# from docstring
if doc is None:
doc = get_doc(func)
match = re.search(DEF_DOC % func_name, doc, RE_FLAG)
# from source code
if not match:
if source is None:
try:
source = inspect.getsource(func)
except (TypeError, IOError):
source = ''
if source:
match = re.search(DEF_SOURCE % func_name, source, RE_FLAG)
if match:
argspec = reduce_spaces(match.group(1))
else:
# try with the inspect.getarg* functions
try:
argspec = inspect.formatargspec(*inspect.getfullargspec(func))
except:
try:
# py 2.X
argspec = inspect.formatargspec(*inspect.getargspec(func))
except:
try:
argspec = inspect.formatargvalues(
*inspect.getargvalues(func))
except:
argspec = ''
if strip_self:
argspec = argspec.replace('self, ', '')
return argspec
def complete(line, cursor, namespace):
"""Complete callable with calltip.
:param line: incomplete text line
:type line: str
:param cursor: current character position
:type cursor: int
:param namespace: namespace
:type namespace: dict
:returns: (matches, world, scrollback)
:rtype: (list of str, str, str)
>>> import os
>>> complete('os.path.isdir(', 14, {'os': os})[-1]
'isdir(s)\\nReturn true if the pathname refers to an existing directory.'
>>> complete('abs(', 4, {})[-1]
'abs(number) -> number\\nReturn the absolute value of the argument.'
"""
matches = []
word = ''
scrollback = ''
match = RE_DEF_COMPLETE.search(line[:cursor])
if match:
word = match.group(1)
func_word = match.group(2)
try:
func = eval(func_word, namespace)
except Exception:
func = None
if func:
doc = get_doc(func)
argspec = get_argspec(func, doc=doc)
scrollback = func_word.split('.')[-1] + (argspec or '()')
if doc.startswith(scrollback):
scrollback = doc
elif doc:
scrollback += '\n' + doc
scrollback = reduce_newlines(scrollback)
return matches, word, scrollback
|
