Python dateparser TypeError:应为字符串或类似字节的对象

这是我的自定义命令，我想将JASON like

publication date:['a week ago']

中的字符串转换为真实日期，以便在Django数据库中创建它。但是当我运行命令时，我得到了这个错误。我不知道是我的命令代码还是JSON

这是一个错误：

match = datetime_re.match(value)
TypeError: expected string or bytes-like object

这是我的模型：

from django.db import models

# Create your models here.
class Job(models.Model):
    job_title = models.CharField(max_length=200)
    company = models.CharField(max_length=200)
    company_url = models.URLField(max_length=200)
    description = models.TextField()
    salary = models.CharField(max_length=200)
    city = models.CharField(max_length=200)
    district = models.CharField(max_length=200)
    publication_date = models.DateTimeField()
    job_url = models.CharField(max_length=200)
    job_type = models.CharField(max_length=200)

    def __str__(self):
        return self.job_title

---

多谢各位。我希望你能帮我。也许我使用dateparser或其他什么错误？

我希望

dateparser.parse（'publication_date'）

总是返回

None

。

from django.core.management.base import BaseCommand
from jobs.models import Job
import json
from datetime import datetime
import dateparser


class Command(BaseCommand):
    help = 'Set up the database'

    def handle(self, *args: str, **options: str):
        with open('static/data.json', 'r') as handle:
            big_json = json.loads(handle.read())
            for item in big_json:

                #Convertir fecha
                publication_date = dateparser.parse('publication_date')

                existing_job = Job.objects.filter(

                    job_title = item['job_title'],
                    company = item['company'],
                    company_url = item['company_url'],
                    description = item['description'],
                    publication_date = item['publication_date'],
                    salary = item['salary'],
                    city = item['city'],
                    district = item['district'],
                    job_url = item['job_url'],
                    job_type = item['job_type'],

                )
                if existing_job.exists() is False:
                    Job.objects.create(

                        job_title = item['job_title'],
                        company = item['company'],
                        company_url = item['company_url'],
                        description = item['description'],
                        publication_date = item['publication_date'],
                        salary = item['salary'],
                        city = item['city'],
                        district = item['district'],
                        job_url = item['job_url'],
                        job_type = item['job_type'],

                    )

                    self.stdout.write(self.style.SUCCESS('added jobs!'))