New submission from Zhiming Wang <zmwa...@gmail.com>:
Since profile/cProfile CLI interface prints a sorted list of stats, using head
to limit output to the most relevant entries should be a fairly natural thing
to do. Unfortunately, BrokenPipeError isn't caught, causing quite a bit of
pollution to the output:
$ python3 -m cProfile -m http.server -h | head
usage: http.server [-h] [--cgi] [--bind ADDRESS] [--directory DIRECTORY]
[port]
positional arguments:
port Specify alternate port [default: 8000]
optional arguments:
-h, --help show this help message and exit
--cgi Run as CGI Server
--bind ADDRESS, -b ADDRESS
Traceback (most recent call last):
File "/Users/zmwang/.pyenv/versions/3.9.0/lib/python3.9/runpy.py", line 197,
in _run_module_as_main
return _run_code(code, main_globals, None,
File "/Users/zmwang/.pyenv/versions/3.9.0/lib/python3.9/runpy.py", line 87,
in _run_code
exec(code, run_globals)
File "/Users/zmwang/.pyenv/versions/3.9.0/lib/python3.9/cProfile.py", line
180, in <module>
main()
File "/Users/zmwang/.pyenv/versions/3.9.0/lib/python3.9/cProfile.py", line
173, in main
runctx(code, globs, None, options.outfile, options.sort)
File "/Users/zmwang/.pyenv/versions/3.9.0/lib/python3.9/cProfile.py", line
19, in runctx
return _pyprofile._Utils(Profile).runctx(statement, globals, locals,
File "/Users/zmwang/.pyenv/versions/3.9.0/lib/python3.9/profile.py", line 66,
in runctx
self._show(prof, filename, sort)
File "/Users/zmwang/.pyenv/versions/3.9.0/lib/python3.9/profile.py", line 72,
in _show
prof.print_stats(sort)
File "/Users/zmwang/.pyenv/versions/3.9.0/lib/python3.9/cProfile.py", line
42, in print_stats
pstats.Stats(self).strip_dirs().sort_stats(sort).print_stats()
File "/Users/zmwang/.pyenv/versions/3.9.0/lib/python3.9/pstats.py", line 431,
in print_stats
self.print_line(func)
File "/Users/zmwang/.pyenv/versions/3.9.0/lib/python3.9/pstats.py", line 513,
in print_line
print(f8(tt/nc), end=' ', file=self.stream)
BrokenPipeError: [Errno 32] Broken pipe
Exception ignored in: <_io.TextIOWrapper name='<stdout>' mode='w'
encoding='utf-8'>
BrokenPipeError: [Errno 32] Broken pipe
I think the exception should be caught in order to suppress this noise.
----------
components: Library (Lib)
messages: 378421
nosy: zmwangx
priority: normal
severity: normal
status: open
title: profile/cProfile CLI should catch BrokenPipeError
type: behavior
versions: Python 3.10
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue42005>
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