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python - 如何使用 Python CSV Writer 保留尾随零

问题描述

我正在尝试将带有单个 json 行的 json 文件转换为 csv。json 数据有一些我需要维护的带有尾随零的元素（例如 1.000000）。写入 csv 时，该值更改为 1.0，除小数点后的第一个零外，删除所有尾随零。如何保留所有尾随零？尾随零的数量可能并不总是静态的。

更新了示例数据的格式。

这是 json 输入的示例：

{"ACCOUNTNAMEDENORM":"John Smith","DELINQUENCYSTATUS":2.0000000000,"RETIRED":0.0000000000,"INVOICEDAYOFWEEK":5.0000000000,"ID":1234567.0000000000,"BEANVERSION":69.0000000000,"ACCOUNTTYPE":1.0000000000,"ORGANIZATIONTYPEDENORM":null,"HIDDENTACCOUNTCONTAINERID":4321987.0000000000,"NEWPOLICYPAYMENTDISTRIBUTABLE":"1","ACCOUNTNUMBER":"000-000-000-00","PAYMENTMETHOD":12345.0000000000,"INVOICEDELIVERYTYPE":98765.0000000000,"DISTRIBUTIONLIMITTYPE":3.0000000000,"CLOSEDATE":null,"FIRSTTWICEPERMTHINVOICEDOM":1.0000000000,"HELDFORINVOICESENDING":"0","FEINDENORM":null,"COLLECTING":"0","ACCOUNTNUMBERDENORM":"000-000-000-00","CHARGEHELD":"0","PUBLICID":"xx:1234346"}

以下是输出示例：

ACCOUNTNAMEDENORM,DELINQUENCYSTATUS,RETIRED,INVOICEDAYOFWEEK,ID,BEANVERSION,ACCOUNTTYPE,ORGANIZATIONTYPEDENORM,HIDDENTACCOUNTCONTAINERID,NEWPOLICYPAYMENTDISTRIBUTABLE,ACCOUNTNUMBER,PAYMENTMETHOD,INVOICEDELIVERYTYPE,DISTRIBUTIONLIMITTYPE,CLOSEDATE,FIRSTTWICEPERMTHINVOICEDOM,HELDFORINVOICESENDING,FEINDENORM,COLLECTING,ACCOUNTNUMBERDENORM,CHARGEHELD,PUBLICID
John Smith,2.0,0.0,5.0,1234567.0,69.0,1.0,,4321987.0,1,000-000-000-00,10012.0,10002.0,3.0,,1.0,0,,0,000-000-000-00,0,bc:1234346

这是代码：

import json
import csv

f=open('test2.json') #open input file

outputFile = open('output.csv', 'w', newline='') #load csv file

output = csv.writer(outputFile) #create a csv.writer

i=1
for line in f:
    try:
        data = json.loads(line) #reads current line into tuple
    except:
        print("Can't load line {}".format(i))
    if i == 1:
        header = data.keys()
        output.writerow(header) #Writes header row
    i += 1
    output.writerow(data.values()) #writes values row

f.close() #close input file

所需的输出如下所示：

ACCOUNTNAMEDENORM,DELINQUENCYSTATUS,RETIRED,INVOICEDAYOFWEEK,ID,BEANVERSION,ACCOUNTTYPE,ORGANIZATIONTYPEDENORM,HIDDENTACCOUNTCONTAINERID,NEWPOLICYPAYMENTDISTRIBUTABLE,ACCOUNTNUMBER,PAYMENTMETHOD,INVOICEDELIVERYTYPE,DISTRIBUTIONLIMITTYPE,CLOSEDATE,FIRSTTWICEPERMTHINVOICEDOM,HELDFORINVOICESENDING,FEINDENORM,COLLECTING,ACCOUNTNUMBERDENORM,CHARGEHELD,PUBLICID
John Smith,2.0000000000,0.0000000000,5.0000000000,1234567.0000000000,69.0000000000,1.0000000000,,4321987.0000000000,1,000-000-000-00,10012.0000000000,10002.0000000000,3.0000000000,,1.0000000000,0,,0,000-000-000-00,0,bc:1234346

标签： pythonjsoncsv

解决方案

模块的解码器默认json解析实数float，因此不会保留尾随零，因为它们不在 Python 中。您可以使用该方法的parse_float参数来使用json.loads构造函数覆盖 JSON 解码器的实数str构造函数：

data = json.loads(line, parse_float=str)

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