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#25991: fix readline example to limit history size. Patch by Daniel Dye.

This commit is contained in:
Ezio Melotti 2016-01-11 23:30:56 +02:00
parent e973620472
commit 7c018aa377
1 changed files with 4 additions and 0 deletions
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Doc/library/readline.rst
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@ -209,6 +209,8 @@ from the user's :envvar:`PYTHONSTARTUP` file. ::
histfile = os.path.join(os.path.expanduser("~"), ".python_history")
try:
readline.read_history_file(histfile)
# default history len is -1 (infinite), which may grow unruly
readline.set_history_length(1000)
except FileNotFoundError:
pass
@ -234,6 +236,7 @@ sessions, by only appending the new history. ::
def save(prev_h_len, histfile):
new_h_len = readline.get_history_length()
readline.set_history_length(1000)
readline.append_history_file(new_h_len - prev_h_len, histfile)
atexit.register(save, h_len, histfile)
@ -261,4 +264,5 @@ support history save/restore. ::
atexit.register(self.save_history, histfile)
def save_history(self, histfile):
readline.set_history_length(1000)
readline.write_history_file(histfile)