Question

我正在尝试将具有单独json行的json文件转换为csv。 json数据包含一些我需要维护的带有尾随零的元素（例如1.000000）。写入csv时，该值将更改为1.0，删除除小数点后的第一个零外的所有尾随零。如何保持所有尾随零？尾随零的数目可能并不总是静态的。

更新了示例数据的格式。

以下是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

代码如下：

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：

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

Answer 1

我一直在尝试，我认为这可以解决您的问题：

将str函数传递给json.loads中的parse_float参数：）

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

这样，当json.loads（）尝试解析浮点数时，它将使用str方法，以便将其解析为字符串并保持零。尝试这样做，它奏效了：

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

此处有更多信息：Json Documentation

PS：您可以使用布尔值而不是i + = 1来获得相同的行为。

Answer 2

json模块的解码器默认情况下使用float解析实数，因此尾随零不会保留，因为它们不在Python中。您可以使用parse_float方法的json.loads参数使用str构造函数来覆盖JSON解码器的实数构造函数：

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

Answer 3

使用格式，但是这里需要给出静态的十进制精度。

>>> '{:.10f}'.format(10.0)
'10.0000000000'

如何使用Python CSV Writer保留尾随零

3 个答案: