Mercurial > cpython-lru_cache-weakref
annotate Lib/idlelib/AutoComplete.py @ 87690:66c1c9f32567 default tip
Add use_weakref option to functools.lru_cache
The use_weakref option makes lru_cache create weak references to the function
arguments when creating the cache key, which prevents them from staying in the
memory forever even after all other references to them are gone.
This is a proof of concept for http://bugs.python.org/issue19859
| author | Radomir Dopieralski <devel@sheep.art.pl> |
|---|---|
| date | Tue, 03 Dec 2013 16:02:48 +0100 |
| parents | c882395e8ed8 |
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| rev | line source |
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1 """AutoComplete.py - An IDLE extension for automatically completing names. |
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2 |
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3 This extension can complete either attribute names of file names. It can pop |
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4 a window with all available names, for the user to select from. |
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5 """ |
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6 import os |
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7 import sys |
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8 import string |
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9 |
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10 from idlelib.configHandler import idleConf |
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11 |
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12 # This string includes all chars that may be in an identifier |
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13 ID_CHARS = string.ascii_letters + string.digits + "_" |
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14 |
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15 # These constants represent the two different types of completions |
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16 COMPLETE_ATTRIBUTES, COMPLETE_FILES = range(1, 2+1) |
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17 |
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18 from idlelib import AutoCompleteWindow |
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19 from idlelib.HyperParser import HyperParser |
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| 21 import __main__ | |
| 22 | |
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23 SEPS = os.sep |
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24 if os.altsep: # e.g. '/' on Windows... |
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25 SEPS += os.altsep |
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26 |
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27 class AutoComplete: |
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28 |
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29 menudefs = [ |
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30 ('edit', [ |
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31 ("Show Completions", "<<force-open-completions>>"), |
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32 ]) |
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33 ] |
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34 |
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35 popupwait = idleConf.GetOption("extensions", "AutoComplete", |
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36 "popupwait", type="int", default=0) |
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37 |
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38 def __init__(self, editwin=None): |
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39 self.editwin = editwin |
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40 if editwin is None: # subprocess and test |
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41 return |
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42 self.text = editwin.text |
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43 self.autocompletewindow = None |
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44 |
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45 # id of delayed call, and the index of the text insert when the delayed |
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46 # call was issued. If _delayed_completion_id is None, there is no |
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47 # delayed call. |
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48 self._delayed_completion_id = None |
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49 self._delayed_completion_index = None |
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50 |
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51 def _make_autocomplete_window(self): |
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52 return AutoCompleteWindow.AutoCompleteWindow(self.text) |
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53 |
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54 def _remove_autocomplete_window(self, event=None): |
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55 if self.autocompletewindow: |
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56 self.autocompletewindow.hide_window() |
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57 self.autocompletewindow = None |
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58 |
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59 def force_open_completions_event(self, event): |
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60 """Happens when the user really wants to open a completion list, even |
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61 if a function call is needed. |
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62 """ |
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63 self.open_completions(True, False, True) |
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64 |
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65 def try_open_completions_event(self, event): |
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66 """Happens when it would be nice to open a completion list, but not |
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67 really necessary, for example after an dot, so function |
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68 calls won't be made. |
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69 """ |
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70 lastchar = self.text.get("insert-1c") |
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71 if lastchar == ".": |
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72 self._open_completions_later(False, False, False, |
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73 COMPLETE_ATTRIBUTES) |
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74 elif lastchar in SEPS: |
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75 self._open_completions_later(False, False, False, |
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76 COMPLETE_FILES) |
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77 |
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78 def autocomplete_event(self, event): |
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79 """Happens when the user wants to complete his word, and if necessary, |
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80 open a completion list after that (if there is more than one |
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81 completion) |
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82 """ |
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83 if hasattr(event, "mc_state") and event.mc_state: |
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84 # A modifier was pressed along with the tab, continue as usual. |
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85 return |
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86 if self.autocompletewindow and self.autocompletewindow.is_active(): |
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87 self.autocompletewindow.complete() |
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88 return "break" |
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89 else: |
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90 opened = self.open_completions(False, True, True) |
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91 if opened: |
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92 return "break" |
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93 |
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94 def _open_completions_later(self, *args): |
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95 self._delayed_completion_index = self.text.index("insert") |
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96 if self._delayed_completion_id is not None: |
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97 self.text.after_cancel(self._delayed_completion_id) |
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98 self._delayed_completion_id = \ |
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99 self.text.after(self.popupwait, self._delayed_open_completions, |
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100 *args) |
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101 |
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102 def _delayed_open_completions(self, *args): |
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103 self._delayed_completion_id = None |
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104 if self.text.index("insert") != self._delayed_completion_index: |
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105 return |
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106 self.open_completions(*args) |
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107 |
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108 def open_completions(self, evalfuncs, complete, userWantsWin, mode=None): |
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109 """Find the completions and create the AutoCompleteWindow. |
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110 Return True if successful (no syntax error or so found). |
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111 if complete is True, then if there's nothing to complete and no |
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112 start of completion, won't open completions and return False. |
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113 If mode is given, will open a completion list only in this mode. |
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114 """ |
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115 # Cancel another delayed call, if it exists. |
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116 if self._delayed_completion_id is not None: |
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117 self.text.after_cancel(self._delayed_completion_id) |
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118 self._delayed_completion_id = None |
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119 |
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120 hp = HyperParser(self.editwin, "insert") |
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121 curline = self.text.get("insert linestart", "insert") |
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122 i = j = len(curline) |
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123 if hp.is_in_string() and (not mode or mode==COMPLETE_FILES): |
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124 # Find the beginning of the string |
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125 # fetch_completions will look at the file system to determine whether the |
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126 # string value constitutes an actual file name |
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127 # XXX could consider raw strings here and unescape the string value if it's |
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128 # not raw. |
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129 self._remove_autocomplete_window() |
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130 mode = COMPLETE_FILES |
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131 # Find last separator or string start |
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132 while i and curline[i-1] not in "'\"" + SEPS: |
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133 i -= 1 |
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134 comp_start = curline[i:j] |
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135 j = i |
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136 # Find string start |
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137 while i and curline[i-1] not in "'\"": |
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138 i -= 1 |
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139 comp_what = curline[i:j] |
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140 elif hp.is_in_code() and (not mode or mode==COMPLETE_ATTRIBUTES): |
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141 self._remove_autocomplete_window() |
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142 mode = COMPLETE_ATTRIBUTES |
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143 while i and (curline[i-1] in ID_CHARS or ord(curline[i-1]) > 127): |
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144 i -= 1 |
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145 comp_start = curline[i:j] |
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146 if i and curline[i-1] == '.': |
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147 hp.set_index("insert-%dc" % (len(curline)-(i-1))) |
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148 comp_what = hp.get_expression() |
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149 if not comp_what or \ |
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150 (not evalfuncs and comp_what.find('(') != -1): |
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151 return |
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152 else: |
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153 comp_what = "" |
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154 else: |
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155 return |
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156 |
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157 if complete and not comp_what and not comp_start: |
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158 return |
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159 comp_lists = self.fetch_completions(comp_what, mode) |
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160 if not comp_lists[0]: |
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161 return |
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162 self.autocompletewindow = self._make_autocomplete_window() |
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163 return not self.autocompletewindow.show_window( |
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164 comp_lists, "insert-%dc" % len(comp_start), |
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165 complete, mode, userWantsWin) |
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166 |
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167 def fetch_completions(self, what, mode): |
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168 """Return a pair of lists of completions for something. The first list |
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169 is a sublist of the second. Both are sorted. |
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170 |
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171 If there is a Python subprocess, get the comp. list there. Otherwise, |
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172 either fetch_completions() is running in the subprocess itself or it |
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173 was called in an IDLE EditorWindow before any script had been run. |
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174 |
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175 The subprocess environment is that of the most recently run script. If |
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176 two unrelated modules are being edited some calltips in the current |
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177 module may be inoperative if the module was not the last to run. |
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178 """ |
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179 try: |
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180 rpcclt = self.editwin.flist.pyshell.interp.rpcclt |
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181 except: |
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182 rpcclt = None |
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183 if rpcclt: |
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184 return rpcclt.remotecall("exec", "get_the_completion_list", |
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185 (what, mode), {}) |
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186 else: |
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187 if mode == COMPLETE_ATTRIBUTES: |
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188 if what == "": |
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189 namespace = __main__.__dict__.copy() |
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190 namespace.update(__main__.__builtins__.__dict__) |
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191 bigl = eval("dir()", namespace) |
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192 bigl.sort() |
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193 if "__all__" in bigl: |
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194 smalll = sorted(eval("__all__", namespace)) |
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195 else: |
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197 else: |
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198 try: |
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199 entity = self.get_entity(what) |
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200 bigl = dir(entity) |
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201 bigl.sort() |
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202 if "__all__" in bigl: |
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203 smalll = sorted(entity.__all__) |
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204 else: |
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206 except: |
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207 return [], [] |
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208 |
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209 elif mode == COMPLETE_FILES: |
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210 if what == "": |
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211 what = "." |
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212 try: |
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213 expandedpath = os.path.expanduser(what) |
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214 bigl = os.listdir(expandedpath) |
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215 bigl.sort() |
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217 except OSError: |
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218 return [], [] |
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219 |
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220 if not smalll: |
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221 smalll = bigl |
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222 return smalll, bigl |
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223 |
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224 def get_entity(self, name): |
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225 """Lookup name in a namespace spanning sys.modules and __main.dict__""" |
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226 namespace = sys.modules.copy() |
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227 namespace.update(__main__.__dict__) |
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228 return eval(name, namespace) |