class Writer:

    def __init__(self, path: str = 'tmp.txt'):
        self.path = path

    def __enter__(self):
        self.file = open(self.path, 'w')
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        self.file.close()

    def print(self, text: str):
        self.file.write(text + '\n')
        print(text)

with Writer('file.txt') as writer:
    ...
    writer.print('first line')
    ...
    writer.print('second line')


with open('file.txt', 'r') as f:
    print('File: \n' + f.read())

'''
first line
second line
File:
first line
second line
'''