编写手指命令的所有行

Question

我是 Python/树莓派的新手。我正在尝试将finger 命令的所有行写入我的网络服务器。我的代码是这样编写的，它只返回第二行。

请参阅下面的代码：

import sys
import os
import time
import datetime
import pytz
import subprocess


then=datetime.datetime.now(pytz.utc)  
TempString=str(then.astimezone(pytz.timezone('US/Eastern')))
TempString=TempString+"</br>" 

print("The following is the result of the Terminal 
Command 
$finger…")
p=subprocess.Popen("finger", shell=True, 
stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
for line in p.stdout.readlines():
 print(line)
 TempStringF=line
retval=p.wait()


print("The following is the string stored in 
TempStringF")
print(TempStringF)
print("Opening WWW Index File for Writing…")

file=open('/var/www/html/index.html','w')
file.write(TempString)
file.write(str(TempStringF))
file.close()

print("Index file has been updated and closed…") 

Answer 1

您的for 循环是问题所在：

for line in p.stdout.readlines():
    print(line)
    TempStringF=line

每次循环运行时，TempStringF 将被 line 的新内容覆盖。相反，将您的累积变量声明为循环外的空字符串，然后在循环中附加到它：

temp_string_f = ""      # recommended style in Python is snake_case, not CapsCase
for line in p.stdout.readlines():
    print(line)
    temp_string_f += line + "<br>"