python修改字典键（key）的方法

info = {}

info["x"] = 1.5

info["y"] = 2

info

info = {"x":1.5 ,"y":2}

info["z"] = info("x")

print(info)

info = {"x":1.5 ,"y":2}

info["z"] = info.pop("x")

info

info = {"x":1.5 ,"y":2}

info.update({"z":info.pop("x")})

info

info = {"x":1.5 ,"y":2}

info["z"] = info["x"]

del info["x"]

info

dict={'a':1, 'b':2}

dict["c"] = dict.pop("a")

dict={'a':1, 'b':2}

dict.update({'c':dict.pop("a")})

dict={'a':1, 'b':2}

dict['c']=dict['a']

del dict['a']