projects / OpenSPARC-T2-SAM / blame
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| 53 | ||
| 54 | <H2><A NAME="SECTION0092010000000000000000"></A><A NAME="readline-example"></A> | |
| 55 | <BR> | |
| 56 | 7.20.1 Example | |
| 57 | </H2> | |
| 58 | ||
| 59 | <P> | |
| 60 | The following example demonstrates how to use the | |
| 61 | <tt class="module">readline</tt> module's history reading and writing functions to | |
| 62 | automatically load and save a history file named <span class="file">.pyhist</span> from | |
| 63 | the user's home directory. The code below would normally be executed | |
| 64 | automatically during interactive sessions from the user's | |
| 65 | <a class="envvar" id='l2h-2964' xml:id='l2h-2964'>PYTHONSTARTUP</a> file. | |
| 66 | ||
| 67 | <P> | |
| 68 | <div class="verbatim"><pre> | |
| 69 | import os | |
| 70 | histfile = os.path.join(os.environ["HOME"], ".pyhist") | |
| 71 | try: | |
| 72 | readline.read_history_file(histfile) | |
| 73 | except IOError: | |
| 74 | pass | |
| 75 | import atexit | |
| 76 | atexit.register(readline.write_history_file, histfile) | |
| 77 | del os, histfile | |
| 78 | </pre></div> | |
| 79 | ||
| 80 | <P> | |
| 81 | The following example extends the <tt class="class">code.InteractiveConsole</tt> class to | |
| 82 | support history save/restore. | |
| 83 | ||
| 84 | <P> | |
| 85 | <div class="verbatim"><pre> | |
| 86 | import code | |
| 87 | import readline | |
| 88 | import atexit | |
| 89 | import os | |
| 90 | ||
| 91 | class HistoryConsole(code.InteractiveConsole): | |
| 92 | def __init__(self, locals=None, filename="<console>", | |
| 93 | histfile=os.path.expanduser("~/.console-history")): | |
| 94 | code.InteractiveConsole.__init__(self) | |
| 95 | self.init_history(histfile) | |
| 96 | ||
| 97 | def init_history(self, histfile): | |
| 98 | readline.parse_and_bind("tab: complete") | |
| 99 | if hasattr(readline, "read_history_file"): | |
| 100 | try: | |
| 101 | readline.read_history_file(histfile) | |
| 102 | except IOError: | |
| 103 | pass | |
| 104 | atexit.register(self.save_history, histfile) | |
| 105 | ||
| 106 | def save_history(self, histfile): | |
| 107 | readline.write_history_file(histfile) | |
| 108 | </pre></div> | |
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| 144 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> | |
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