Python--文件修改

第一种

# with open('geci.txt', 'a+') as f:
#     f.seek(0)
#     all1 = f.read()
#     new_all = all1.replace('读', '想')
#     f.seek(0)
#     f.truncate()
#     f.write(new_all)
#     f.flush()

第二种

import os


with open('geci.txt', 'a+') as f, open('gecibak.txt', 'w') as f1:
    f.seek(0)
    for line in f:
        new_line = line.replace('读', '想')
        f1.write(new_line)

os.remove('geci.txt')  # 删除文件
os.rename('gecibak.txt', 'geci.txt')  # 文件改名