轉-利用python將json數據轉換為csv格式

 

 

轉載請注明出處 https://blog.csdn.net/qq_23926575/article/details/72788485

假設.json文件中存儲的數據為：

{"type": "Point", "link": "http://www.dianping.com/newhotel/22416995", "coordinates": [116.37256372996957, 40.39798447055443], "category": "經濟型", "name": "北京荷塘山庄", "count": "278", "address": "北京市懷柔區黃花城村安四路", "price": "380"} {"type": "Point", "link": "http://www.dianping.com/newhotel/19717653", "coordinates": [116.56881588256466, 40.43310967948417], "category": "經濟型", "name": "慕田峪長城魚師傅鄉村酒店", "count": "89", "address": "北京市懷柔區渤海鎮葦店村(慕田峪長城下3公里處，近懷黃路)", "price": "258"} {"type": "Point", "link": "http://www.dianping.com/newhotel/58365289", "coordinates": [116.62874974822378, 40.45610264855833], "category": "經濟型", "name": "北京蜜桃兒親子客棧", "count": "119", "address": "北京市懷柔區神堂峪風景區下官地11號", "price": "549"} 

 

現在需要將上面的這些數據存為csv格式，其中字典的keys為csv中的屬性名稱，字典的values為csv中屬性對應的值。

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如果只需要按照json的keys來生成csv，那么操作比較簡單，直接按照下面的方法即可：

#-*-coding:utf-8-*-
import csv
import json
import sys
import codecs

def trans(path):
    jsonData = codecs.open(path+'.json', 'r', 'utf-8')
    # csvfile = open(path+'.csv', 'w') # 此處這樣寫會導致寫出來的文件會有空行
    # csvfile = open(path+'.csv', 'wb') # python2下
    csvfile = open(path+'.csv', 'w', newline='') # python3下
    writer = csv.writer(csvfile, delimiter='\t', quoting=csv.QUOTE_ALL)
    flag = True
    for line in jsonData:
        dic = json.loads(line[0:-1])
        if flag:
            # 獲取屬性列表
            keys = list(dic.keys())
            print (keys)
            writer.writerow(keys) # 將屬性列表寫入csv中
            flag = False
        # 讀取json數據的每一行，將values數據一次一行的寫入csv中
        writer.writerow(list(dic.values()))
    jsonData.close()
    csvfile.close()

if __name__ == '__main__':
    path=str(sys.argv[1]) # 獲取path參數
    print (path)
    trans(path)

　　

在python3下運行，命令行輸入

python C:\Users\MaMQ\Documents\jsonToCsv.py C:\Users\MaMQ\Documents\data\geoFood

 

其中第三個參數為需要轉換的文件的路徑和其名稱，將其后綴刪除。運行文件后即可得到轉換后的csv文件。

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如果需要對json文件中每個字典的key字段進行修改，比如需要將上面dict中的coordinate中的經緯度數據取出來存為x、y數據，則可以按照下面的方法（此方法還可以調整每個屬性顯示的順序，效果更好一點）：

import csv
import json
import sys
import codecs

def trans(path):
    jsonData = codecs.open(path+'.json', 'r', 'utf-8')
    # csvfile = open(path+'.csv', 'w') # 此處這樣寫會導致寫出來的文件會有空行
    # csvfile = open(path+'.csv', 'wb') # python2下
    csvfile = open(path+'.csv', 'w', newline='') # python3下
    writer = csv.writer(csvfile, delimiter='\t', quoting=csv.QUOTE_ALL)
    keys=['id', 'name', 'category', 'price', 'count', 'type', 'address', 'link', 'x', 'y']
    writer.writerow(keys)
    i = 1
    for dic in jsonData:
        dic = json.loads(dic[0:-1])
        x = dic['coordinates'][0]
        y = dic['coordinates'][1]
        writer.writerow([str(i),dic['name'],dic['category'],dic['price'],dic['count'],dic['type'],dic['address'],dic['link'],x,y])
        i += 1
    jsonData.close()
    csvfile.close()

if __name__ == '__main__':
    path = str(sys.argv[1])
    print (path)
    trans(path)