Documentation/Source/eric4.DebugClients.Python3.FlexCompleter.html

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23 <h1>eric4.DebugClients.Python3.FlexCompleter</h1>
24 <p>
25 Word completion for the eric4 shell
26 </p><p>
27 <h4>NOTE for eric4 variant</h4>
28 </p><p>
29 This version is a re-implementation of rlcompleter
30 as found in the Python3 library. It is modified to work with the eric4
31 debug clients.
32 </p><p>
33 <h4>Original rlcompleter documentation</h4>
34 </p><p>
35 This requires the latest extension to the readline module. The completer
36 completes keywords, built-ins and globals in a selectable namespace (which
37 defaults to __main__); when completing NAME.NAME..., it evaluates (!) the
38 expression up to the last dot and completes its attributes.
39 </p><p>
40 It's very cool to do "import sys" type "sys.", hit the
41 completion key (twice), and see the list of names defined by the
42 sys module!
43 </p><p>
44 Tip: to use the tab key as the completion key, call
45 </p><p>
46 readline.parse_and_bind("tab: complete")
47 </p><p>
48 <b>Notes</b>:
49 <ul>
50 <li>
51 Exceptions raised by the completer function are *ignored* (and
52 generally cause the completion to fail). This is a feature -- since
53 readline sets the tty device in raw (or cbreak) mode, printing a
54 traceback wouldn't work well without some complicated hoopla to save,
55 reset and restore the tty state.
56 </li>
57 <li>
58 The evaluation of the NAME.NAME... form may cause arbitrary
59 application defined code to be executed if an object with a
60 __getattr__ hook is found. Since it is the responsibility of the
61 application (or the user) to enable this feature, I consider this an
62 acceptable risk. More complicated expressions (e.g. function calls or
63 indexing operations) are *not* evaluated.
64 </li>
65 <li>
66 When the original stdin is not a tty device, GNU readline is never
67 used, and this module (and the readline module) are silently inactive.
68 </li>
69 </ul>
70 </p>
71 <h3>Global Attributes</h3>
72 <table>
73 <tr><td>__all__</td></tr>
74 </table>
75 <h3>Classes</h3>
76 <table>
77 <tr>
78 <td><a href="#Completer">Completer</a></td>
79 <td>Class implementing the command line completer object.</td>
80 </tr>
81 </table>
82 <h3>Functions</h3>
83 <table>
84 <tr>
85 <td><a href="#get_class_members">get_class_members</a></td>
86 <td>Module function to retrieve the class members.</td>
87 </tr>
88 </table>
89 <hr /><hr />
90 <a NAME="Completer" ID="Completer"></a>
91 <h2>Completer</h2>
92 <p>
93 Class implementing the command line completer object.
94 </p>
95 <h3>Derived from</h3>
96 object
97 <h3>Class Attributes</h3>
98 <table>
99 <tr><td>None</td></tr>
100 </table>
101 <h3>Methods</h3>
102 <table>
103 <tr>
104 <td><a href="#Completer.__init__">Completer</a></td>
105 <td>Create a new completer for the command line.</td>
106 </tr><tr>
107 <td><a href="#Completer._callable_postfix">_callable_postfix</a></td>
108 <td>Protected method to check for a callable.</td>
109 </tr><tr>
110 <td><a href="#Completer.attr_matches">attr_matches</a></td>
111 <td>Compute matches when text contains a dot.</td>
112 </tr><tr>
113 <td><a href="#Completer.complete">complete</a></td>
114 <td>Return the next possible completion for 'text'.</td>
115 </tr><tr>
116 <td><a href="#Completer.global_matches">global_matches</a></td>
117 <td>Compute matches when text is a simple name.</td>
118 </tr>
119 </table>
120 <a NAME="Completer.__init__" ID="Completer.__init__"></a>
121 <h4>Completer (Constructor)</h4>
122 <b>Completer</b>(<i>namespace = None</i>)
123 <p>
124 Create a new completer for the command line.
125 </p><p>
126 Completer([namespace]) -> completer instance.
127 </p><p>
128 If unspecified, the default namespace where completions are performed
129 is __main__ (technically, __main__.__dict__). Namespaces should be
130 given as dictionaries.
131 </p><p>
132 Completer instances should be used as the completion mechanism of
133 readline via the set_completer() call:
134 </p><p>
135 readline.set_completer(Completer(my_namespace).complete)
136 </p><dl>
137 <dt><i>namespace</i></dt>
138 <dd>
139 The namespace for the completer.
140 </dd>
141 </dl><a NAME="Completer._callable_postfix" ID="Completer._callable_postfix"></a>
142 <h4>Completer._callable_postfix</h4>
143 <b>_callable_postfix</b>(<i>val, word</i>)
144 <p>
145 Protected method to check for a callable.
146 </p><dl>
147 <dt><i>val</i></dt>
148 <dd>
149 value to check (object)
150 </dd><dt><i>word</i></dt>
151 <dd>
152 word to ammend (string)
153 </dd>
154 </dl><dl>
155 <dt>Returns:</dt>
156 <dd>
157 ammended word (string)
158 </dd>
159 </dl><a NAME="Completer.attr_matches" ID="Completer.attr_matches"></a>
160 <h4>Completer.attr_matches</h4>
161 <b>attr_matches</b>(<i>text</i>)
162 <p>
163 Compute matches when text contains a dot.
164 </p><p>
165 Assuming the text is of the form NAME.NAME....[NAME], and is
166 evaluatable in self.namespace, it will be evaluated and its attributes
167 (as revealed by dir()) are used as possible completions. (For class
168 instances, class members are are also considered.)
169 </p><p>
170 <b>WARNING</b>: this can still invoke arbitrary C code, if an object
171 with a __getattr__ hook is evaluated.
172 </p><dl>
173 <dt><i>text</i></dt>
174 <dd>
175 The text to be completed. (string)
176 </dd>
177 </dl><dl>
178 <dt>Returns:</dt>
179 <dd>
180 A list of all matches.
181 </dd>
182 </dl><a NAME="Completer.complete" ID="Completer.complete"></a>
183 <h4>Completer.complete</h4>
184 <b>complete</b>(<i>text, state</i>)
185 <p>
186 Return the next possible completion for 'text'.
187 </p><p>
188 This is called successively with state == 0, 1, 2, ... until it
189 returns None. The completion should begin with 'text'.
190 </p><dl>
191 <dt><i>text</i></dt>
192 <dd>
193 The text to be completed. (string)
194 </dd><dt><i>state</i></dt>
195 <dd>
196 The state of the completion. (integer)
197 </dd>
198 </dl><dl>
199 <dt>Returns:</dt>
200 <dd>
201 The possible completions as a list of strings.
202 </dd>
203 </dl><a NAME="Completer.global_matches" ID="Completer.global_matches"></a>
204 <h4>Completer.global_matches</h4>
205 <b>global_matches</b>(<i>text</i>)
206 <p>
207 Compute matches when text is a simple name.
208 </p><dl>
209 <dt><i>text</i></dt>
210 <dd>
211 The text to be completed. (string)
212 </dd>
213 </dl><dl>
214 <dt>Returns:</dt>
215 <dd>
216 A list of all keywords, built-in functions and names currently
217 defined in self.namespace that match.
218 </dd>
219 </dl>
220 <div align="right"><a href="#top">Up</a></div>
221 <hr /><hr />
222 <a NAME="get_class_members" ID="get_class_members"></a>
223 <h2>get_class_members</h2>
224 <b>get_class_members</b>(<i>klass</i>)
225 <p>
226 Module function to retrieve the class members.
227 </p><dl>
228 <dt><i>klass</i></dt>
229 <dd>
230 The class object to be analysed.
231 </dd>
232 </dl><dl>
233 <dt>Returns:</dt>
234 <dd>
235 A list of all names defined in the class.
236 </dd>
237 </dl>
238 <div align="right"><a href="#top">Up</a></div>
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