author | Nishanth Amuluru <nishanth@fossee.in> |
Sat, 08 Jan 2011 15:13:56 +0530 | |
changeset 318 | 49ee2a7f1350 |
parent 307 | c6bca38c1cbf |
permissions | -rw-r--r-- |
307
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1 |
import sys |
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2 |
|
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3 |
try: |
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4 |
reversed = reversed |
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5 |
except NameError: |
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6 |
def reversed(sequence): |
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7 |
"""reversed(sequence) -> reverse iterator over values of the sequence |
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8 |
|
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9 |
Return a reverse iterator |
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10 |
""" |
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11 |
if hasattr(sequence, '__reversed__'): |
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12 |
return sequence.__reversed__() |
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13 |
if not hasattr(sequence, '__getitem__'): |
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14 |
raise TypeError("argument to reversed() must be a sequence") |
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15 |
return reversed_iterator(sequence) |
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16 |
|
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17 |
class reversed_iterator(object): |
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18 |
|
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19 |
def __init__(self, seq): |
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20 |
self.seq = seq |
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21 |
self.remaining = len(seq) |
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22 |
|
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23 |
def __iter__(self): |
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24 |
return self |
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25 |
|
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26 |
def next(self): |
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27 |
i = self.remaining |
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28 |
if i > 0: |
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29 |
i -= 1 |
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30 |
item = self.seq[i] |
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31 |
self.remaining = i |
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32 |
return item |
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33 |
raise StopIteration |
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34 |
|
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35 |
def __length_hint__(self): |
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36 |
return self.remaining |
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37 |
|
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38 |
try: |
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39 |
any = any |
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40 |
except NameError: |
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41 |
def any(iterable): |
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42 |
for x in iterable: |
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43 |
if x: |
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44 |
return True |
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45 |
return False |
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46 |
|
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47 |
try: |
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48 |
all = all |
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49 |
except NameError: |
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50 |
def all(iterable): |
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51 |
for x in iterable: |
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52 |
if not x: |
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53 |
return False |
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54 |
return True |
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55 |
|
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56 |
try: |
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57 |
sorted = sorted |
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58 |
except NameError: |
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59 |
builtin_cmp = cmp # need to use cmp as keyword arg |
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60 |
|
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61 |
def sorted(iterable, cmp=None, key=None, reverse=0): |
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62 |
use_cmp = None |
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63 |
if key is not None: |
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64 |
if cmp is None: |
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65 |
def use_cmp(x, y): |
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66 |
return builtin_cmp(x[0], y[0]) |
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67 |
else: |
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68 |
def use_cmp(x, y): |
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69 |
return cmp(x[0], y[0]) |
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70 |
l = [(key(element), element) for element in iterable] |
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71 |
else: |
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72 |
if cmp is not None: |
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73 |
use_cmp = cmp |
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74 |
l = list(iterable) |
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75 |
if use_cmp is not None: |
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76 |
l.sort(use_cmp) |
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77 |
else: |
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78 |
l.sort() |
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79 |
if reverse: |
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80 |
l.reverse() |
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81 |
if key is not None: |
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82 |
return [element for (_, element) in l] |
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83 |
return l |
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84 |
|
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85 |
try: |
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86 |
set, frozenset = set, frozenset |
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87 |
except NameError: |
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88 |
from sets import set, frozenset |
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89 |
|
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90 |
# pass through |
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91 |
enumerate = enumerate |
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92 |
|
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93 |
try: |
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94 |
BaseException = BaseException |
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95 |
except NameError: |
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96 |
BaseException = Exception |
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97 |
|
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98 |
try: |
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99 |
GeneratorExit = GeneratorExit |
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100 |
except NameError: |
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101 |
class GeneratorExit(Exception): |
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102 |
""" This exception is never raised, it is there to make it possible to |
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103 |
write code compatible with CPython 2.5 even in lower CPython |
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104 |
versions.""" |
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105 |
pass |
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106 |
GeneratorExit.__module__ = 'exceptions' |
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107 |
|
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108 |
_sysex = (KeyboardInterrupt, SystemExit, MemoryError, GeneratorExit) |
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109 |
|
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110 |
if sys.version_info >= (3, 0): |
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111 |
exec ("print_ = print ; exec_=exec") |
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112 |
import builtins |
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113 |
|
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114 |
# some backward compatibility helpers |
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115 |
_basestring = str |
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116 |
def _totext(obj, encoding=None): |
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117 |
if isinstance(obj, bytes): |
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118 |
obj = obj.decode(encoding) |
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119 |
elif not isinstance(obj, str): |
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120 |
obj = str(obj) |
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121 |
return obj |
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122 |
|
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123 |
def _isbytes(x): |
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124 |
return isinstance(x, bytes) |
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125 |
def _istext(x): |
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126 |
return isinstance(x, str) |
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|
127 |
|
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|
128 |
def _getimself(function): |
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|
129 |
return getattr(function, '__self__', None) |
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130 |
|
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131 |
def _getfuncdict(function): |
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132 |
return getattr(function, "__dict__", None) |
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|
133 |
|
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|
134 |
def _getcode(function): |
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|
135 |
return getattr(function, "__code__", None) |
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|
136 |
|
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|
137 |
def execfile(fn, globs=None, locs=None): |
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138 |
if globs is None: |
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|
139 |
back = sys._getframe(1) |
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|
140 |
globs = back.f_globals |
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|
141 |
locs = back.f_locals |
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|
142 |
del back |
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|
143 |
elif locs is None: |
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144 |
locs = globs |
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|
145 |
fp = open(fn, "rb") |
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|
146 |
try: |
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|
147 |
source = fp.read() |
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|
148 |
finally: |
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|
149 |
fp.close() |
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|
150 |
co = compile(source, fn, "exec", dont_inherit=True) |
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|
151 |
exec_(co, globs, locs) |
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changeset
|
152 |
|
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|
153 |
def callable(obj): |
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|
154 |
return hasattr(obj, "__call__") |
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|
155 |
|
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|
156 |
else: |
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|
157 |
import __builtin__ as builtins |
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|
158 |
_totext = unicode |
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|
159 |
_basestring = basestring |
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|
160 |
execfile = execfile |
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|
161 |
callable = callable |
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|
162 |
def _isbytes(x): |
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|
163 |
return isinstance(x, str) |
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|
164 |
def _istext(x): |
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|
165 |
return isinstance(x, unicode) |
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changeset
|
166 |
|
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changeset
|
167 |
def _getimself(function): |
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changeset
|
168 |
return getattr(function, 'im_self', None) |
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changeset
|
169 |
|
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changeset
|
170 |
def _getfuncdict(function): |
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|
171 |
return getattr(function, "__dict__", None) |
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changeset
|
172 |
|
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changeset
|
173 |
def _getcode(function): |
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|
174 |
try: |
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changeset
|
175 |
return getattr(function, "__code__") |
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|
176 |
except AttributeError: |
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|
177 |
return getattr(function, "func_code", None) |
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changeset
|
178 |
|
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changeset
|
179 |
def print_(*args, **kwargs): |
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changeset
|
180 |
""" minimal backport of py3k print statement. """ |
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changeset
|
181 |
sep = ' ' |
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changeset
|
182 |
if 'sep' in kwargs: |
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changeset
|
183 |
sep = kwargs.pop('sep') |
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changeset
|
184 |
end = '\n' |
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Added buildout stuff and made changes accordingly
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changeset
|
185 |
if 'end' in kwargs: |
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changeset
|
186 |
end = kwargs.pop('end') |
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changeset
|
187 |
file = 'file' in kwargs and kwargs.pop('file') or sys.stdout |
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changeset
|
188 |
if kwargs: |
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|
189 |
args = ", ".join([str(x) for x in kwargs]) |
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changeset
|
190 |
raise TypeError("invalid keyword arguments: %s" % args) |
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diff
changeset
|
191 |
at_start = True |
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changeset
|
192 |
for x in args: |
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changeset
|
193 |
if not at_start: |
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changeset
|
194 |
file.write(sep) |
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diff
changeset
|
195 |
file.write(str(x)) |
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changeset
|
196 |
at_start = False |
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changeset
|
197 |
file.write(end) |
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diff
changeset
|
198 |
|
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Nishanth Amuluru <nishanth@fossee.in>
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changeset
|
199 |
def exec_(obj, globals=None, locals=None): |
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Added buildout stuff and made changes accordingly
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changeset
|
200 |
""" minimal backport of py3k exec statement. """ |
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changeset
|
201 |
__tracebackhide__ = True |
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Added buildout stuff and made changes accordingly
Nishanth Amuluru <nishanth@fossee.in>
parents:
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changeset
|
202 |
if globals is None: |
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parents:
diff
changeset
|
203 |
frame = sys._getframe(1) |
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diff
changeset
|
204 |
globals = frame.f_globals |
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Nishanth Amuluru <nishanth@fossee.in>
parents:
diff
changeset
|
205 |
if locals is None: |
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Added buildout stuff and made changes accordingly
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parents:
diff
changeset
|
206 |
locals = frame.f_locals |
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Added buildout stuff and made changes accordingly
Nishanth Amuluru <nishanth@fossee.in>
parents:
diff
changeset
|
207 |
elif locals is None: |
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Added buildout stuff and made changes accordingly
Nishanth Amuluru <nishanth@fossee.in>
parents:
diff
changeset
|
208 |
locals = globals |
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Added buildout stuff and made changes accordingly
Nishanth Amuluru <nishanth@fossee.in>
parents:
diff
changeset
|
209 |
exec2(obj, globals, locals) |
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changeset
|
210 |
|
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Nishanth Amuluru <nishanth@fossee.in>
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diff
changeset
|
211 |
if sys.version_info >= (3,0): |
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diff
changeset
|
212 |
def _reraise(cls, val, tb): |
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diff
changeset
|
213 |
__tracebackhide__ = True |
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changeset
|
214 |
assert hasattr(val, '__traceback__') |
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Added buildout stuff and made changes accordingly
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diff
changeset
|
215 |
raise val |
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Added buildout stuff and made changes accordingly
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diff
changeset
|
216 |
else: |
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Added buildout stuff and made changes accordingly
Nishanth Amuluru <nishanth@fossee.in>
parents:
diff
changeset
|
217 |
exec (""" |
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Added buildout stuff and made changes accordingly
Nishanth Amuluru <nishanth@fossee.in>
parents:
diff
changeset
|
218 |
def _reraise(cls, val, tb): |
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Added buildout stuff and made changes accordingly
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diff
changeset
|
219 |
__tracebackhide__ = True |
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Added buildout stuff and made changes accordingly
Nishanth Amuluru <nishanth@fossee.in>
parents:
diff
changeset
|
220 |
raise cls, val, tb |
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Added buildout stuff and made changes accordingly
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parents:
diff
changeset
|
221 |
def exec2(obj, globals, locals): |
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Added buildout stuff and made changes accordingly
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parents:
diff
changeset
|
222 |
__tracebackhide__ = True |
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Added buildout stuff and made changes accordingly
Nishanth Amuluru <nishanth@fossee.in>
parents:
diff
changeset
|
223 |
exec obj in globals, locals |
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Added buildout stuff and made changes accordingly
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parents:
diff
changeset
|
224 |
""") |
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Added buildout stuff and made changes accordingly
Nishanth Amuluru <nishanth@fossee.in>
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changeset
|
225 |
|
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Nishanth Amuluru <nishanth@fossee.in>
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changeset
|
226 |
def _tryimport(*names): |
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diff
changeset
|
227 |
""" return the first successfully imported module. """ |
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|
228 |
assert names |
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Nishanth Amuluru <nishanth@fossee.in>
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changeset
|
229 |
for name in names: |
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changeset
|
230 |
try: |
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changeset
|
231 |
return __import__(name, None, None, '__doc__') |
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|
232 |
except ImportError: |
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Added buildout stuff and made changes accordingly
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diff
changeset
|
233 |
excinfo = sys.exc_info() |
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Added buildout stuff and made changes accordingly
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diff
changeset
|
234 |
_reraise(*excinfo) |