[issue40372] doctest example programs should exit 1 if any test fails

[Andreas Sommer]

New submission from Andreas Sommer :

Documentation recommends calling `doctest.testmod()`, but exits with code 0 
even if a test fails.

--
assignee: docs@python
components: Documentation
messages: 367086
nosy: Andreas Sommer, docs@python
priority: normal
severity: normal
status: open
title: doctest example programs should exit 1 if any test fails
type: enhancement
versions: Python 2.7, Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9

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[issue23750] Clarify difference between os.system/subprocess.call in section "Replacing os.system()"

[Andreas Sommer]

New submission from Andreas Sommer:

Reading over the section "Replacing os.system()" 
(https://docs.python.org/2/library/subprocess.html#replacing-os-system), one 
might assume that the return value of os.system and subprocess.call are 
equivalent.

status = os.system("mycmd" + " myarg")
# becomes
status = subprocess.call("mycmd" + " myarg", shell=True)

However, they are not. Example:

import sys
import os
import subprocess

print subprocess.call("false")
print os.system("false")

gives 1 and 256, respectively. Maybe this could be rephrased for clarity, or a 
hint added.

--
assignee: docs@python
components: Documentation
messages: 239028
nosy: Andreas Sommer, docs@python
priority: normal
severity: normal
status: open
title: Clarify difference between os.system/subprocess.call in section 
"Replacing os.system()"
type: enhancement

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