如何從python中的字符串獲取子字符串2

Question

我想從字符串中獲取子字符串，但必須具體，但如果您使用此函數並打印它，您會得到一個長字符串
與所有當前沒有響應的進程和他們的信息，我需要從特定進程的PID。

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

例如，如果的chrome.exe沒有響應，這將是在列表中，我想獲得的PID與它相關聯。我嘗試了split()和pop()來挑出我需要的東西，但沒有成功。

編輯：
我有10多個進程共享相同的應用程序名稱。 我需要使用PID並且它屬於正確的應用程序。我不希望我的腳本也會殺死所有的東西。

因此，在短期我需要找到PID是在同一行指定的「PROCESS_NAME」，然後只保留該「PID」

希望是有道理的。

Answer 1

我認爲有獲取進程的PID僅適用的方法，但是如果你想知道如何從一個字符串使用正則表達式

提取特定字符串的正則表達式匹配PID：\w+\.\w+\s+(\d+)\s

import os 
import re 

r = os.popen('tasklist /FI "STATUS eq Not Responding"').read().strip() 
print re.findall('\w+\.\w+\s+(\d+)\s',r) 

輸出：

['4024'] 

Answer 2

基於How to extract a specific field from output of tasklist on the windows command line：

print os.popen('for /f "tokens=2 delims=," %F in (\'tasklist /nh /fi "STATUS eq Not Responding" /fo csv\') do @echo %~F').read().strip() 

Answer 3

可以通過讓任務列表返回到你的列表作爲CSV簡化你的生活：

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" 

與csv模塊利用這個，你現在有：

>>> 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' 

我擺脫/NH切換（無標題）從csv模塊獲取字典。