python_文件操作

f=open("a.txt","r",encoding="utf-8")
print(f.read())  #读取全部
print("=================")
f.seek(0)
print(f.readline()) #读取下一行
print("=================")
f.seek(0)
print(f.readlines()) #读取全部并list返回


D:\study\python\test\venv\Scripts\python.exe D:/study/python/test/dd.py
zhaozhao3,123456,2
zhaozhao1,1234567,3
zhaozhao2,123456,3
zhaozhao6,123456

=================
zhaozhao3,123456,2

=================
[‘zhaozhao3,123456,2\n‘, ‘zhaozhao1,1234567,3\n‘, ‘zhaozhao2,123456,3\n‘, ‘zhaozhao6,123456\n‘]