f = open("yesterday2","a",encoding="utf-8")
f = open("yesterday2","r",encoding="utf-8")
f = open("yesterday2","w",encoding="utf-8")
print (f.read())
f.write("sssssssssss")
f.close()
参数解释:
a:追加 append 追加
r:读,默认就是r模式
w:写,新建一个文件,会覆盖之前有的
'r+':读写
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