【python】json转csv

 需求：当同名文件夹下有多个json文件，批量转换到一个csv中

 json中包含多层结构

​
import os

import pandas as pd
import json
#同一个目录下读取多个json文件转csv文件


def json_to_csv():
    dir="/Users/cecilia/school/"
    files=os.listdir(dir)

    datalist=[]
    for filename in files:
        if filename.endswith(".json"):
            filepath=dir+filename
            #print(filepath)
            with open(filepath) as f:
                 datalist+= f.readlines()
    dictlist=[]
    for data in datalist:
        #print(data)
        try:
            dictlist.append(json.loads(data))
        except Exception:
            print(data)


    df = pd.json_normalize(dictlist, record_path=['colleges'],
                       meta=['errno','msg','total']
                       )

    print(df)
    df.to_csv("/Users/cecilia/school2.csv")



if __name__ == '__main__':
    json_to_csv()
    print("jie su")

​