在文本文件中查找单词

Question

I tried to create a little password cracker just for myself. The problem is that the program always tells me: Password not found! I use a text file with just one word in a line!

pw = "password"

# The password in the list is "password"

pwlist = open('passwordlist.txt', 'r')
words = pwlist.readlines()
found = False

for password in words:
    if str(password) == pw:
        print(password)
        found = True
        break


if found == True:
   print("password found!")
else:
   print("Password not found!")

Answer 1

这段代码看起来应该可以正常工作...您可以确认.txt文件中的单词确实是“密码”（拼写相同，没有多余的字符/空格等）吗？

Answer 2

The method readlines() doesn't strip trailing carriage returns from the lines. Try

if password.strip() == pw: 

Answer 3

The readline() method picks up the newline character at the end of each line \\n (new line escape sequence).

You'll notice that if you open your text file it is actually two lines, the second line just has length 0 .

So to make this work, you'll need to replace:

words = pwlist.readlines()

With this:

words = [line.rstrip('\n') for line in pwlist]