Python从入门到实践 第十章课后习题10.1

with open('learning_python.txt') as file_object:
    contents = file_object.read()
    print(contents)
with open('learning_python.txt') as file_object:
    lines = file_object.readlines()
for line in lines:
    print(line.rstrip())
with open('learning_python.txt') as file_object:
    for line in file_object:
        print(line.rstrip())