问题
I'm pulling the following line of data from an API. The data starts with a b prefix which would indicate according to the Python 3.3 documentation that we are dealing with "a bytes literal" with the escape sequences \t and \n representing the ASCII Horizontal Tab (TAB) and ASCII Linefeed (LF) respectively.
b'settlement-id\tsettlement-start-date\tsettlement-end-date\tdeposit-date\ttotal-amount\tcurrency\ttransaction-type\torder-id\tmerchant-order-id\tadjustment-id\tshipment-id\tmarketplace-name\tamount-type\tamount-description\tamount\tfulfillment-id\tposted-date\tposted-date-time\torder-item-code\tmerchant-order-item-id\tmerchant-adjustment-item-id\tsku\tquantity-purchased\n7293436482\t03.05.2018 09:10:07 UTC\t04.05.2018 20:30:23 UTC\t06.05.2018 20:30:23 UTC\t53,44\tEUR\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n7293436482\t\t\t\t\t\tOrder\t303-3746292-6119509\t\t\tDRGC8lFbB\tAmazon.de\tItemPrice\tPrincipal\t179,99\tMFN\t03.05.2018\t03.05.2018 17:12:22 UTC\t30407746733299\t\t\t3700546702556-180412-chp-18c10347-1\t1\n7293436482\t\t\t\t\t\tOrder\t303-3746292-6119509\t\t\tDRGC8lFbB\tAmazon.de\tItemFees\tCommission\t-32,40\tMFN\t03.05.2018\t03.05.2018 17:12:22 UTC\t30407746733299\t\t\t3700546702556-180412-chp-18c10347-1\t1\n7293436482\t\t\t\t\t\tRefund\t305-1251749-5602732\t305-1251749-5602732\tamzn1:crow:YZkTuxs4RhO8FpZez3cGCg\t\tAmazon.de\tItemPrice\tPrincipal\t-109,99\tAFN\t04.05.2018\t04.05.2018 18:24:39 UTC\t38048998219979\t\t142721169810\t3700546702082-180124-jpn-131N28-6\t\n7293436482\t\t\t\t\t\tRefund\t305-1251749-5602732\t305-1251749-5602732\tamzn1:crow:YZkTuxs4RhO8FpZez3cGCg\t\tAmazon.de\tItemFees\tCommission\t19,80\tAFN\t04.05.2018\t04.05.2018 18:24:39 UTC\t38048998219979\t\t142721169810\t3700546702082-180124-jpn-131N28-6\t\n7293436482\t\t\t\t\t\tRefund\t305-1251749-5602732\t305-1251749-5602732\tamzn1:crow:YZkTuxs4RhO8FpZez3cGCg\t\tAmazon.de\tItemFees\tRefundCommission\t-3,96\tAFN\t04.05.2018\t04.05.2018 18:24:39 UTC\t38048998219979\t\t142721169810\t3700546702082-180124-jpn-131N28-6\t\n'
When I convert this data to a string using .decode("utf-8") I get the corresponding tab delimited data:
settlement-id settlement-start-date settlement-end-date deposit-date total-amount currency transaction-type order-id merchant-order-id adjustment-id shipment-id marketplace-name amount-type amount-description amount fulfillment-id posted-date posted-date-time order-item-code merchant-order-item-id merchant-adjustment-item-id sku quantity-purchased
7293436482 03.05.2018 09:10:07 UTC 04.05.2018 20:30:23 UTC 06.05.2018 20:30:23 UTC 53,44 EUR
7293436482 Order 303-3746292-6119509 DRGC8lFbB Amazon.de ItemPrice Principal 179,99 MFN 03.05.2018 03.05.2018 17:12:22 UTC 30407746733299 3700546702556-180412-chp-18c10347-1 1
7293436482 Order 303-3746292-6119509 DRGC8lFbB Amazon.de ItemFees Commission -32,40 MFN 03.05.2018 03.05.2018 17:12:22 UTC 30407746733299 3700546702556-180412-chp-18c10347-1 1
7293436482 Refund 305-1251749-5602732 305-1251749-5602732 amzn1:crow:YZkTuxs4RhO8FpZez3cGCg Amazon.de ItemPrice Principal -109,99 AFN 04.05.2018 04.05.2018 18:24:39 UTC 38048998219979 142721169810 3700546702082-180124-jpn-131N28-6
7293436482 Refund 305-1251749-5602732 305-1251749-5602732 amzn1:crow:YZkTuxs4RhO8FpZez3cGCg Amazon.de ItemFees Commission 19,80 AFN 04.05.2018 04.05.2018 18:24:39 UTC 38048998219979 142721169810 3700546702082-180124-jpn-131N28-6
7293436482 Refund 305-1251749-5602732 305-1251749-5602732 amzn1:crow:YZkTuxs4RhO8FpZez3cGCg Amazon.de ItemFees RefundCommission -3,96 AFN 04.05.2018 04.05.2018 18:24:39 UTC 38048998219979 142721169810 3700546702082-180124-jpn-131N28-6
However, I cannot seem to save this data to a tab delimited csv file. I have tried several methods to save this data to a csv file all of which have failed including the following:
with open("folder_GET_V2_SETTLEMENT_REPORT_DATA_FLAT_FILE_V2_/" + grl_id + ".csv", "w") as csv_file:
writer = csv.writer(csv_file)
for row in csv_file:
print(row)
Which gives me the following error:
for row in csv_file:
io.UnsupportedOperation: not readable
Update: So it turns out the problem lies elsewhere. I had actually managed to generate the same file as you during my various tests thought it wasn't working as the output looked wrong. When opening the file in excel the data was split into two columns.
I have now figured out that the reason for that is there are some numbers using the european way of noting decimals which is a coma 179,99. Excel is therefore interpreting this as a delimiter whereas if I open the file in Notepad it reads correctly.
回答1:
Well you are getting the error because you wish to write the data to the csv file but in the for loop you are trying to read from the file. If I understand correctly, you wish to take in the bytes object, and write it nicely into a tab separated csv file. The following code would do that:
import csv, re
orig = b'settlement-id\tsettlement-start-date\tsettlement-end-date\tdeposit-date\ttotal-amount\tcurrency\ttransaction-type\torder-id\tmerchant-order-id\tadjustment-id\tshipment-id\tmarketplace-name\tamount-type\tamount-description\tamount\tfulfillment-id\tposted-date\tposted-date-time\torder-item-code\tmerchant-order-item-id\tmerchant-adjustment-item-id\tsku\tquantity-purchased\n7293436482\t03.05.2018 09:10:07 UTC\t04.05.2018 20:30:23 UTC\t06.05.2018 20:30:23 UTC\t53,44\tEUR\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n7293436482\t\t\t\t\t\tOrder\t303-3746292-6119509\t\t\tDRGC8lFbB\tAmazon.de\tItemPrice\tPrincipal\t179,99\tMFN\t03.05.2018\t03.05.2018 17:12:22 UTC\t30407746733299\t\t\t3700546702556-180412-chp-18c10347-1\t1\n7293436482\t\t\t\t\t\tOrder\t303-3746292-6119509\t\t\tDRGC8lFbB\tAmazon.de\tItemFees\tCommission\t-32,40\tMFN\t03.05.2018\t03.05.2018 17:12:22 UTC\t30407746733299\t\t\t3700546702556-180412-chp-18c10347-1\t1\n7293436482\t\t\t\t\t\tRefund\t305-1251749-5602732\t305-1251749-5602732\tamzn1:crow:YZkTuxs4RhO8FpZez3cGCg\t\tAmazon.de\tItemPrice\tPrincipal\t-109,99\tAFN\t04.05.2018\t04.05.2018 18:24:39 UTC\t38048998219979\t\t142721169810\t3700546702082-180124-jpn-131N28-6\t\n7293436482\t\t\t\t\t\tRefund\t305-1251749-5602732\t305-1251749-5602732\tamzn1:crow:YZkTuxs4RhO8FpZez3cGCg\t\tAmazon.de\tItemFees\tCommission\t19,80\tAFN\t04.05.2018\t04.05.2018 18:24:39 UTC\t38048998219979\t\t142721169810\t3700546702082-180124-jpn-131N28-6\t\n7293436482\t\t\t\t\t\tRefund\t305-1251749-5602732\t305-1251749-5602732\tamzn1:crow:YZkTuxs4RhO8FpZez3cGCg\t\tAmazon.de\tItemFees\tRefundCommission\t-3,96\tAFN\t04.05.2018\t04.05.2018 18:24:39 UTC\t38048998219979\t\t142721169810\t3700546702082-180124-jpn-131N28-6\t\n'
# Split the long string into a list of lines
data = orig.decode('utf-8').splitlines()
# Open the file for writing
with open("tmp.csv", "w") as csv_file:
# Create the writer object with tab delimiter
writer = csv.writer(csv_file, delimiter = '\t')
for line in data:
# Writerow() needs a list of data to be written, so split at all empty spaces in the line
writer.writerow(re.split('\s+',line))
来源：https://stackoverflow.com/questions/51089194/python-convert-bytes-unicode-tab-delimited-data-to-csv-file