The operation of json in python notes on files

'''
json operations on files

'''
import codecs
import json

test = {"a":1,"b":2}
# f = open("1.txt","w")
# json.dump(test,f) # Write to the file

with codecs.open("1.txt","w") as f:
    json.dump(test,f) # python object is written to file

with codecs.open("1.txt","r") as f:
    aa = json.load(f) # read from file as python object
    print(aa)
    print(type(aa))