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python - 无法在 python3 类中传递参数

问题描述

__init__()首先，我在中创建了一个类，models.py如下所示。当我将它导入到我views.py的 . 但是当我尝试运行该程序时，它向我显示一个错误，指出该类不接受任何参数。任何帮助将不胜感激，ty。

模型.py：

from django.db import models

class destination:
    def __init__(self, name, desc, price, img):
        self.name = name
        self.desc = desc
        self.price = price
        self.img = img

视图.py：

from django.shortcuts import render
from .models  import destination

dest1 = destination('Bali', 'Nice place to visit', 1000, 'destination_1.jpg')
dest2 = destination('Mumbai', 'The city that never sleeps', 500, 'destination_2.jpg')
dest3 = destination('Sylhet', 'The city of tea', 100, 'destination_3.jpg')
dests = [dest1, dest2, dest3]

def travello(req):
    return render(req, 'index.html', {'dests': dests})

当我运行时python3 manage.py runserver：

Traceback (most recent call last):
  File "manage.py", line 21, in <module>
    main()
  File "manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/core/management/__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/core/management/base.py", line 323, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 60, in execute
    super().execute(*args, **options)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/core/management/base.py", line 364, in execute
    output = self.handle(*args, **options)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 95, in handle
    self.run(**options)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 102, in run
    autoreload.run_with_reloader(self.inner_run, **options)
Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python3.7/threading.py", line 926, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.7/threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/utils/autoreload.py", line 54, in wrapper
    fn(*args, **kwargs)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 117, in inner_run
    self.check(display_num_errors=True)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/core/management/base.py", line 390, in check
    include_deployment_checks=include_deployment_checks,
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/core/management/base.py", line 377, in _run_checks
    return checks.run_checks(**kwargs)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/core/checks/registry.py", line 72, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/core/checks/urls.py", line 13, in check_url_config
    return check_resolver(resolver)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/core/checks/urls.py", line 23, in check_resolver
    return check_method()
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/urls/resolvers.py", line 398, in check
    for pattern in self.url_patterns:
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/utils/functional.py", line 80, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/urls/resolvers.py", line 571, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/utils/functional.py", line 80, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/urls/resolvers.py", line 564, in urlconf_module
    return import_module(self.urlconf_name)
  File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/adnanbadshah/telusko/telusko/urls.py", line 21, in <module>
    path('', include('travello.urls'))
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/urls/conf.py", line 34, in include
    urlconf_module = import_module(urlconf_module)
  File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/adnanbadshah/telusko/travello/urls.py", line 1, in <module>
    from . import views
  File "/home/adnanbadshah/telusko/travello/views.py", line 6, in <module>
    dest1 = destination('Bali', 'Nice place to visit', 1000, 'destination_1.jpg')
TypeError: destination() takes no arguments

  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/utils/autoreload.py", line 579, in run_with_reloader
    start_django(reloader, main_func, *args, **kwargs)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/utils/autoreload.py", line 564, in start_django
    reloader.run(django_main_thread)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/utils/autoreload.py", line 272, in run
    get_resolver().urlconf_module
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/utils/functional.py", line 80, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/urls/resolvers.py", line 564, in urlconf_module
    return import_module(self.urlconf_name)
  File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/adnanbadshah/telusko/telusko/urls.py", line 21, in <module>
    path('', include('travello.urls'))
  File "/home/adnanbadshah/test/lib/python3.7/site-packages/django/urls/conf.py", line 34, in include
    urlconf_module = import_module(urlconf_module)
  File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/adnanbadshah/telusko/travello/urls.py", line 1, in <module>
    from . import views
  File "/home/adnanbadshah/telusko/travello/views.py", line 6, in <module>
    dest1 = destination('Bali', 'Nice place to visit', 1000, 'destination_1.jpg')
TypeError: destination() takes no arguments

标签： pythondjango

解决方案

运行您的代码剪断就像它对我有用，并且剪断的代码并不能真正说明问题，所以我希望您在某个时候导入另一个目的地，您没有在您的剪断中提供或隐藏在另一个导入后面。我建议重命名你的类，例如Destination（使用大写字母是推荐的写类名的方法），看看是否能解决你的问题。

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