如何从python 2中的字符串中获取子字符串

Question

我正在尝试从字符串中获取子字符串,但它必须是特定的,
如果您使用此函数并打印它,您将获得一个包含所有当前无响应进程及其信息的长字符串,我需要来自一个字符串的PID具体过程.

r = os.popen('tasklist /FI "STATUS eq Not Responding"').read().strip()  
print r 

例如,如果chrome.exe没有响应,它将在列表中,我想得到与之关联的PID.我试着split()和pop()挑出我需要什么都没有成功.

编辑:
我有10多个进程都共享相同的应用程序名称.我必须使用PID并且它属于正确的应用程序.我也不希望我的脚本杀死一切.

所以简而言之,我需要找到与指定的'process_name'位于同一行的PID,然后只保留'PID'

希望有道理.

Answer 1

您可以通过让任务列表以CSV格式返回列表来简化您的生活:

C:\>tasklist /FI "STATUS eq Not Responding" /FO CSV /NH
"jusched.exe","3596","Console","1","13,352 K"
"chrome.exe","4760","Console","1","181,088 K"
"chrome.exe","3456","Console","1","119,044 K"
"chrome.exe","2432","Console","1","24,236 K"
"chrome.exe","440","Console","1","36,420 K"
"chrome.exe","4964","Console","1","60,596 K"
"chrome.exe","3608","Console","1","21,924 K"
"chrome.exe","4996","Console","1","22,348 K"
"chrome.exe","2580","Console","1","38,432 K"
"chrome.exe","3312","Console","1","32,756 K"
"chrome.exe","4600","Console","1","36,072 K"
"chrome.exe","4180","Console","1","24,436 K"
"chrome.exe","4320","Console","1","31,152 K"
"chrome.exe","4120","Console","1","22,632 K"

利用该csv模块,您现在拥有:

>>> r = os.popen('tasklist /FI "STATUS eq Not Responding" /FO CSV')
>>> import csv
>>> reader = csv.DictReader(r, delimiter=',')
>>> rows = list(reader)
>>> rows[0]
{'Session Name': 'Console', 'Mem Usage': '13,352 K', 'PID': '3596', 'Image Name'
: 'jusched.exe', 'Session#': '1'}
>>> rows[0]['PID']
'3596'

我摆脱了/NH开关(No Header)从csv模块中获取字典.