python 文件相关操作

filename = 'pi_digits.txt'

with open(filename) as a:
    lines = a.readlines()
print(lines)
# 在外面也可以用lines变量
for line in lines:
    print(line.rstrip())
for line in lines:
    print(line)

filename = 'programming.txt'

# 'w' 模式会清空已经存在的文件
with open(filename, 'a') as file_object:
    file_object.write('i love python\n')