puthonj基础知识：文件的读取和写入

file=open("ceshi.text","r+")
res=file.read()
file.write("hah212121212121xxxc")
print(res)

file=open("ceshi.text","r+")
file.write("444")
res=file.read()
print(res)

file=open("ceshi.text","r+")
print(file.write("444"))
a=type(file.write("444"))
print(a)

file=open("ceshi.text","r+",encoding="utf-8")
# res=file.read()
file.write("喜喜卡卡1231")
# print(res)

file=open("ceshi.text","r+",encoding="utf-8")
res=file.read()
# file.write("喜喜卡卡1231")
print(res)

file=open("ceshi.text","r+",encoding="utf-8")
res=file.read()
file.write("喜喜卡卡1231")
print(res)

file=open("ceshi.text","r",encoding="utf-8")
# file.write("\n朱家haha")
a=file.read()
print(a)