python - Why can i read lines from file only one time?

Question

I have a file containing python's object as string, then i open it and doing things like i showing:

>>> file = open('gods.txt')
>>> file.readlines()
["{'brahman': 'impersonal', 'wishnu': 'personal, immortal', 'brahma': 'personal, mortal'}
"]

But then i have problem because there is no longer any lines:

>>> f.readlines()
[]
>>> f.readline(0)
''

Why it is heppening and how can i stay with access to file's lines?

Answer 1

There's only one line in that file, and you just read it. readlines returns a list of all the lines. If you want to re-read the file, you have to do file.seek(0)