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Executing Python script using subprocess.Popen twice interactively fails without error the second time #45866

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canhuth mannequin opened this issue Nov 30, 2007 · 3 comments
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Executing Python script using subprocess.Popen twice interactively fails without error the second time #45866

canhuth mannequin opened this issue Nov 30, 2007 · 3 comments
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OS-windows type-bug An unexpected behavior, bug, or error

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@canhuth
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Mannequin

canhuth mannequin commented Nov 30, 2007

BPO 1525
Nosy @amauryfa

Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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GitHub fields:

assignee = None
closed_at = <Date 2007-11-30.11:11:09.791>
created_at = <Date 2007-11-30.10:00:43.971>
labels = ['type-bug', 'invalid', 'OS-windows']
title = 'Executing Python script using subprocess.Popen twice interactively fails without error the second time'
updated_at = <Date 2007-11-30.11:29:39.092>
user = 'https://bugs.python.org/canhuth'

bugs.python.org fields:

activity = <Date 2007-11-30.11:29:39.092>
actor = 'canhuth'
assignee = 'none'
closed = True
closed_date = <Date 2007-11-30.11:11:09.791>
closer = 'amaury.forgeotdarc'
components = ['Windows']
creation = <Date 2007-11-30.10:00:43.971>
creator = 'canhuth'
dependencies = []
files = []
hgrepos = []
issue_num = 1525
keywords = []
message_count = 3.0
messages = ['57971', '57974', '57976']
nosy_count = 2.0
nosy_names = ['amaury.forgeotdarc', 'canhuth']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = None
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue1525'
versions = ['Python 2.5']
@canhuth
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Mannequin Author

canhuth mannequin commented Nov 30, 2007

Executing script using subprocess.Popen twice interactively fails
without error the second time. File a.py:

print "start"
import subprocess

print "first call"
process = subprocess.Popen(
args = "cmd.exe /c echo 1",
stdout = subprocess.PIPE)

for line in process.stdout:
	if not line:
		break;
	print line;

print "second call"
process = subprocess.Popen(
args = "cmd.exe /c echo 2",
stdout = subprocess.PIPE)

for line in process.stdout:
	if not line:
		break;
	print line;

print "end"

Executing it in Python on Windows, interactively:

Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
(Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import a
start
first call
1

second call
2

end
>>> import a
>>>

@canhuth canhuth mannequin added OS-windows type-bug An unexpected behavior, bug, or error labels Nov 30, 2007
@amauryfa
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Top-level statements are executed only the first time the module is
imported:
http://docs.python.org/tut/node8.html#moreModules
To execute a script from python, you should consider the execfile()
function instead.

@canhuth
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canhuth mannequin commented Nov 30, 2007

Bah, silly me, I apologize, and thank you for the quick feedback.

@ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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