python 2.7 - Getting Error when reading a file -

i'm getting simple confusing error when trying create login worker via python.

here's error i'm getting.

traceback (most recent call last):   file "stratixlogin.py", line 87, in <module>     main()   file "stratixlogin.py", line 78, in main     login_worker()   file "stratixlogin.py", line 51, in login_worker     data = f.read() valueerror: mixing iteration , read methods lose datanter code 

here error occuring:

with open("global_users.txt", "r") f:     line in f:         data = f.read()         if data == username_ask:             print(g+"success!")              password_ask = raw_input(o+"password:"+w+" ")              open("global_passwords.txt", "r") f:                 line in f:                     data = f.read()                     if data == password_ask:                         print(g+"success!")                      else:                         print(r+"incorrect password!")          else:             print(r+"no users found!") 

i not sure error here, confused on how fix this. ideas?

you can't mix iterating through lines of file (the for loop) , read().
enough:

with open("global_users.txt", "r") f:     data in f:         if data == username_ask:             print(g+"success!")              password_ask = raw_input(o+"password:"+w+" ")              open("global_passwords.txt", "r") f:                 line in f:                     data = f.read()                     if data == password_ask:                         print(g+"success!")                      else:                         print(r+"incorrect password!")          else:             print(r+"no users found!")