Python csv reader for row in reader給出語法錯誤

Question

Django/Python 新手。 我需要為 CSV 文件編寫一個導入腳本來播種一些數據（不使用固定裝置，因為那是基於 JSON 而不是 CSV）。

這有效：

import csv
from datetime import datetime
from django.utils.timezone import make_aware
from django.core.management.base import BaseCommand
from chatterbox.models import Organisation, Course, Student

class Command(BaseCommand):
    def handle(self, **options):

      CSV_PATH = './students_AEKI.csv'

      Student.objects.filter(organisation__name__exact="AEKI").delete()

      with open(CSV_PATH) as file:
        file.readline() # skip the header
        csv_reader = csv.reader(file, delimiter=',')
        org = Organisation.objects.filter(name="AEKI")

        for row in csv_reader:
          _, Student.objects.get_or_create(
              first_name=row[0],
              last_name=row[1],
              email=row[2],
              organisation=org[0],
              enrolled=row[4],
              last_booking=row[5],
              credits_total=row[6],
              credits_balance=row[7],
              )

這不起作用：

import csv
from datetime import datetime
from django.utils.timezone import make_aware
from django.core.management.base import BaseCommand
from chatterbox.models import Organisation, Course, Student

class Command(BaseCommand):
    def handle(self, **options):

      CSV_PATH = './students_AEKI.csv'

      Student.objects.filter(organisation__name__exact="AEKI").delete()

      with open(CSV_PATH) as file:
        file.readline() # skip the header
        csv_reader = csv.reader(file, delimiter=',')
        org = Organisation.objects.filter(name="AEKI")

        for row in csv_reader:
          enrolled_utc = make_aware(datetime.strptime(row[4], '%Y-%m-%d'))
          last_booking_utc = make_aware(datetime.strptime((row[5], '%Y-%m-%d'))
          _, Student.objects.get_or_create(
              first_name=row[0],
              last_name=row[1],
              email=row[2],
              organisation=org[0],
              enrolled=enrolled_utc,
              last_booking=last_booking_utc,
              credits_total=row[6],
              credits_balance=row[7],
              )

“_”處的語法錯誤。

在表中創建數據之前，我需要對數據進行一些操作（例如，將時區添加到日期字段）。 那么第二版有什么問題呢？

Answer 1

“_”處有語法錯誤。 刪除尾隨字符。

此行還有一個額外的括號：

last_booking_utc = datetime.strptime((row[5], '%Y-%m-%d')

從

        for row in csv_reader:
          enrolled_utc = make_aware(datetime.strptime(row[4], '%Y-%m-%d'))
          last_booking_utc = make_aware(datetime.strptime((row[5], '%Y-%m-%d'))
          _, Student.objects.get_or_create(
              first_name=row[0],
              last_name=row[1],
              email=row[2],
              organisation=org[0],
              enrolled=enrolled_utc,
              last_booking=last_booking_utc,
              credits_total=row[6],
              credits_balance=row[7],
              )

至

        for row in csv_reader:
            enrolled_utc = make_aware(datetime.strptime(row[4], '%Y-%m-%d'))
            last_booking_utc = make_aware(datetime.strptime(row[5], '%Y-%m-%d'))
            Student.objects.get_or_create(
              first_name=row[0],
              last_name=row[1],
              email=row[2],
              organisation=org[0],
              enrolled=enrolled_utc,
              last_booking=last_booking_utc,
              credits_total=row[6],
              credits_balance=row[7],
              )