使用python子进程运行shell命令[重复]

Question

这个问题在这里已有答案：

Actual meaning of 'shell=True' in subprocess 5个答案

为什么python的subprocess.Popen（）行为在运行shell命令作为字符串和列表时是奇怪的？什么时候我们应该将shell命令作为字符串和列表传递？

>>> import subprocess
>>> p = subprocess.Popen('du -sh *', stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
>>> stdout, _ = p.communicate()
>>> print stdout[:1000]
244M    bin
3.1M    bmps
14M     buildweb
10M     contrib
4.0M    gobuild
168K    gobuild-starter-kit
468K    gobuild-test
3.6M    lib
46M     machines
1.4M    machineweb
75M     microservices
1.4M    monthly_maintenance
20K     perforce
9.1M    scheduler
196K    service
2.5M    statusweb
516K    storage
228K    symindex
7.2M    webapps

>>> p = subprocess.Popen('du -sh *'.split(), stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
>>> stdout, _ = p.communicate()
>>> print stdout[:1000]
8       ./statusweb/infrastructure/management/commands
12      ./statusweb/infrastructure/management
16      ./statusweb/infrastructure
48      ./statusweb/statusweb/settings
56      ./statusweb/statusweb
164     ./statusweb/dashboard/migrations
8       ./statusweb/dashboard/tests/fixtures
64      ./statusweb/dashboard/tests
12      ./statusweb/dashboard/static/dashboard/img
12      ./statusweb/dashboard/static/dashboard/css
48      ./statusweb/dashboard/static/dashboard/js/status
12      ./statusweb/dashboard/static/dashboard/js/spec
72      ./statusweb/dashboard/static/dashboard/js
100     ./statusweb/dashboard/static/dashboard
104     ./statusweb/dashboard/static
36      ./statusweb/dashboard/templates/dashboard/dust
32      ./statusweb/dashboard/templates/dashboard/emails
88      ./statusweb/dashboard/templates/dashboard
8       ./statusweb/dashboard/templates/admin/dashboard/issue
8       ./statusweb/dashboard/templates/admin/dashboard/maintenance
20      ./statusweb/dashboard/templates/admin/dashboard
28      ./statusweb/dashboard/templates/admin
8       ./statusweb/dashboard/templates/registra