How to use the same line of code in all functions?

Question

I am newbie in Python. I wonder if it is possible that all functions inherit the same line of code?

with open(filename, 'r') as f: as this line of code is the same in all three functions. Is it possible to inherit the code without using classes?

I tried to find the answer on stackoverflow and python documentation, but with no luck.

def word_count(filename):
    with open(filename, 'r') as f:
        return len(f.read().split())


def line_count(filename):
    with open(filename, 'r') as f:
        return len(f.read().splitlines())


def character_count(filename):
    with open(filename, 'r') as f:
        return len(f.read())

Answer 1

The common code in your case is

with open(filename, 'r') as f:
    contents = f.read()

So just move it to its own function:

def get_file_contents(filename):
    with open(filename, 'r') as f:
        return f.read()

def word_count(filename):
    return len(get_file_contents(filename).split())

def line_count(filename):        
    return len(get_file_contents(filename).splitlines())

def character_count(filename):
    return len(get_file_contents(filename))

Answer 2

What I've done in the past is split the code out into another function, in your example

with open(filename, 'r') as f:
         f.read()

Is common within all of your methods, so I'd look at rewriting it like so.

def read_file(filename):
    with open(filename, 'r') as f:
         return f.read()

def word_count(filename):
    return len(read_file(filename).split())

def line_count(filename):
    return len(read_file(filename).splitlines())

def character_count(filename):
    return len(read_file(filename))