读写txt

"""
author:张鑫
date:2021/6/11 15:47
"""
import random
import re

list1 = [
    'a', '1', 'A',
    'b', '2', 'B',
    'c', '3', 'C',
    'd', '4', 'D',
]
'''
# 循环写入
for i in range(100):
    # a是可重复。w是覆盖
    with open('txt.txt', 'a')as f:
        # \n换行
        f.writelines(str(i)+'\n')
'''

'''
for item in list1:
    with open('txt.txt', 'a') as f:
        f.writelines('\n' + item)
'''
'''
# 循环读取
for line in open('txt.txt'):
    # 去除首尾空格
    print(line.strip())
    # 去除首尾0
    print(line.strip('0'))
'''