[英]How to preserve trailing zeros with Python CSV Writer
我正在嘗試將具有單獨json行的json文件轉換為csv。 json數據包含一些我需要維護的帶有尾隨零的元素(例如1.000000)。 寫入csv時,該值將更改為1.0,刪除除小數點后的第一個零外的所有尾隨零。 如何保持所有尾隨零? 尾隨零的數目可能並不總是靜態的。
更新了示例數據的格式。
這是json輸入的示例:
{"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"}
這是輸出示例:
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
這是代碼:
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
所需的輸出如下所示:
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
我一直在嘗試,我認為這可以解決您的問題:
將str函數傳遞給json.loads中的parse_float參數:)
data = json.loads(line, parse_float=str)
這樣,當json.loads()嘗試解析浮點數時,它將使用str方法,以便將其解析為字符串並保持零。 嘗試這樣做,它的工作原理是:
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
此處更多信息: Json文檔
PS:您可以使用布爾值而不是i + = 1來獲得相同的行為。
json
模塊的解碼器默認情況下會解析帶float
的實數,因此不會保留尾隨零,因為它們在Python中不是。 您可以使用json.loads
方法的parse_float
參數使用str
構造函數來覆蓋JSON解碼器的實數構造函數:
data = json.loads(line, parse_float=str)
使用格式,但是這里需要給出靜態的十進制精度。
>>> '{:.10f}'.format(10.0)
'10.0000000000'
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