Question 4. [4 MARKS]
You decide to save all your passwords in files, one password per file. You then decide you want to update
your 6-character UTORid password, but you don't remember which of your password files you saved it
in. Luckily, this is the only 6-character password you have so you decide to write a function to find the
password and change it.
Your code runs, but the function's body contains four bugs which will result in the function execution not
matching its docstring description. In the space provided, rewrite the buggy lines with the bugs fixed. Do
not add or remove any lines.
def change password(files_list, new-password):
" (list of str, str) -> str
Preconditions:
(1) files list is not empty.
(2) Each file in files_list contains one single-line password.
(3) All files in files_list contain passwords of different lengths.
(4) Your 6-character password is guaranteed to be in one of these files.
In the appropriate file from files_list, replace your 6-character password
with new-password, and return your old password.
#Code
If you think a given line contains a bug,
rewrite it. Otherwise leave it blank.
found = True
for filename in files list[:-1]:
passwd_file = open(filename, 'r')
first line = passwd_file.read()
password = first line.strip("2")
if password == 6:
passwd_file.close()
passwd_file = open(filename, 'w')
passwd_file.write(new_password)
found = True
passwd_file.close()
if found: # This is correct. Do not modify.
return password
