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接收错误:“TypeError:只能将列表(不是”元组“)连接到列表”

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我正在尝试 Build 一个在Python和Django上运行的软件 . 说明说使用以下命令生成SQL数据库:

python manage.py migrate

但是,当我这样做时,我收到以下错误:

python:Traceback(最近一次调用最后一次):在行:1 char:1 python manage.py migrate ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ :( Traceback(最近调用last):: String)[],RemoteException FullyQualifiedErrorId:NativeCommandError文件“manage.py”,第10行,在execute_from_command_line(sys.argv)文件“C:\ Python27 \ lib \ site-packages \ django \ core \ management__init __ . py“,第353行,在execute_from_command_line utility.execute()文件”C:\ Python27 \ lib \ site-packages \ django \ core \ management__init __ . py“,第302行,执行settings.INSTALLED_APPS文件“C:\ Python27 \ lib \ site-packages \ django \ conf__init __ . py”,第55行,在getattr self._setup(name)文件“C:\ Python27 \ lib \ site-packages \ django \ conf__init __ . py”中,第43行,在_setup中自我._wrapped =设置(settings_module)文件“C:\ Python27 \ lib \ site-packages \ django \ conf__init __ . py”,第99行,在init mod = importlib.import_module(self.SETTINGS_MODULE)文件中“ C:\ Python27 \ lib \ importlib__init __ . py“,第37行,在import_module导入中(na me)文件“F:\ directory \ settings.py”,第117行,在TEMPLATE_CONTEXT_PROCESSORS = global_settings.TEMPLATE_CONTEXT_PROCESSORS(TypeError:只能连接列表(不是“元组”)到列表

这似乎表明问题出现在'settings.py'文件的第116行,我在下面有:

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
import os
from django.conf import global_settings

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.8/howto/deployment/checklist/

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = []


# Application definition

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'game',
    'admin_views',
)

MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'django.middleware.security.SecurityMiddleware',
)

ROOT_URLCONF = 'cagweb.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, 'game/templates/')],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'cagweb.wsgi.application'


# Database
# https://docs.djangoproject.com/en/1.8/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}


# Internationalization
# https://docs.djangoproject.com/en/1.8/topics/i18n/

LANGUAGE_CODE = 'en-us'
#LANGUAGE_CODE = 'fr'

LOCALE_PATHS = (
        os.path.join(BASE_DIR, 'locale'),
)

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.8/howto/static-files/

STATICFILES_DIRS = (
        os.path.join(BASE_DIR, "static"),
)

STATIC_URL = '/static/'

TEMPLATE_CONTEXT_PROCESSORS = global_settings.TEMPLATE_CONTEXT_PROCESSORS + (
)

有人可以帮我理解如何解决这个问题吗?

我不确定它是否相关,但我正在使用Windows 7,Python 2.7和Powershell来尝试运行该软件 .

先感谢您!如果我遗漏了任何信息,请告诉我,我会发布 .

2 回答

  • 1

    () 是一个空元组,而 [] 表示一个空列表 .

    由于 global_settings.TEMPLATE_CONTEXT_PROCESSORSlist 类型,因此您应该只将其连接到另一个列表:

    TEMPLATE_CONTEXT_PROCESSORS = global_settings.TEMPLATE_CONTEXT_PROCESSORS + []
    
  • 1

    例1

    >>> type(())
    <type 'tuple'>
    

    例2

    >>> [1,2,3] + ()
    TypeError: can only concatenate list (not "tuple") to list
    

    在示例代码的最后一行,您将添加 () ,这是第一个示例1,即空元组的文字 . 通过您的错误和示例2,我可以假设 global_settings.TEMPLATE_CONTEXT_PROCESSORS 是一个列表,并且您正在尝试"list + tuple",这与 __add__ 不兼容并引发该异常 .

    尝试将最后一行更改为:

    TEMPLATE_CONTEXT_PROCESSORS = global_settings.TEMPLATE_CONTEXT_PROCESSORS
    

    或者,如果由于某种未知的原因,你真的需要添加一些东西......

    TEMPLATE_CONTEXT_PROCESSORS = global_settings.TEMPLATE_CONTEXT_PROCESSORS + []
    

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