python Popen中的花括号 [英] Curly Braces in python Popen

问题描述

正在运行的子进程无法正确处理花括号

Running subprocess won't handle curly braces correctly

# Python 2.7.4

import subprocess
subprocess.Popen('ls src/*.cpp',shell=True): 
src/tonemap.cpp src/pch.cpp

subprocess.Popen('ls src/{t,p}*.cpp', shell=True)
ls: cannot access src/{p,t}*.cpp: No such file or directory

同一程序将在使用python 2.7.2的另一台计算机上运行.两种系统都使用bash shell.

The same program will work on a different machine with python 2.7.2. Both systems use bash shells.

您的原因以及如何解决?

Do you the reason and how can I fix it?

直接从命令行调用命令将返回正确的结果:

Invoking the command directly from the command line returns the correct result:

ls src/{t,p}*.cpp
src/tonamep.cpp src/pch.cpp

推荐答案

shell=True运行不支持此语法的/bin/sh.明确指定bash:

shell=True runs /bin/sh that doesn't support this syntax. Specify bash explicitly:

from subprocess import check_call

check_call('ls src/{t,p}*.cpp', shell=True, executable='/bin/bash')

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