How to get help on methods in Python? [duplicate]

Question

whenever I use help() on a method I get a weird looking output. For example, help(obj.readline) gives me the following output:

Help on built-in function readline:

readline(...)

That's all i get. I don't know how to interpret it.Why there is no description about the method? Can somebody please explain to me what's going on?

Answer 1

Is this weird output?

>>> f = open('data.txt')
>>> help(f.readline)
Help on built-in function readline:

readline(...)
    readline([size]) -> next line from the file, as a string.

    Retain newline.  A non-negative size argument limits the maximum
    number of bytes to return (an incomplete line may be returned then).
    Return an empty string at EOF.