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Python 3.9.2: subprocess.py - RuntimeWarning: line buffering (buffering=1) isn't supported in binary mode, the default buffer size will be used #2

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amal-khailtash opened this issue Mar 5, 2021 · 0 comments

amal-khailtash commented Mar 5, 2021

On Python 3.9.2, the bufsize=1 on the following line:

101: p = Popen(command, stdout=PIPE, stderr=STDOUT, shell=True, bufsize=1)

causes this warning:

$ jenkenv run Jenkinsfile
.../python/3.9.2/lib/python3.9/subprocess.py:941: RuntimeWarning: line buffering (buffering=1) isn't supported in binary mode, the default buffer size will be used
  self.stdout = io.open(c2pread, 'rb', bufsize)

Removing bufsize=1 fixes this issue.

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