Django makemessages报错TypeError：期望路径对象而非列表求助

问题描述 #

在PyCharm中创建多语言Django项目时，执行python manage.py makemessages -l fr命令无法生成.po文件，报错如下：

Traceback (most recent call last):
  File "/Applications/PyCharm.app/Contents/plugins/python/helpers/pycharm/django_manage.py", line 52, in <module>
    run_command()
  File "/Applications/PyCharm.app/Contents/plugins/python/helpers/pycharm/django_manage.py", line 46, in run_command
    run_module(manage_file, None, '__main__', True)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/runpy.py", line 225, in run_module
    return _run_module_code(code, init_globals, run_name, mod_spec)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/runpy.py", line 97, in _run_module_code
    _run_code(code, mod_globals, init_globals,
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "/Users/famronnebratt/PycharmProjects/CompValid3/manage.py", line 22, in <module>
    main()
  File "/Users/famronnebratt/PycharmProjects/CompValid3/manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "/Users/famronnebratt/PycharmProjects/CompValid3/venv/lib/python3.9/site-packages/django/core/management/__init__.py", line 442, in execute_from_command_line
    utility.execute()
  File "/Users/famronnebratt/PycharmProjects/CompValid3/venv/lib/python3.9/site-packages/django/core/management/__init__.py", line 436, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Users/famronnebratt/PycharmProjects/CompValid3/venv/lib/python3.9/site-packages/django/core/management/base.py", line 412, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/Users/famronnebratt/PycharmProjects/CompValid3/venv/lib/python3.9/site-packages/django/core/management/base.py", line 458, in execute
    output = self.handle(*args, **options)
  File "/Users/famronnebratt/PycharmProjects/CompValid3/venv/lib/python3.9/site-packages/django/core/management/commands/makemessages.py", line 430, in handle
    potfiles = self.build_potfiles()
  File "/Users/famronnebratt/PycharmProjects/CompValid3/venv/lib/python3.9/site-packages/django/core/management/commands/makemessages.py", line 506, in build_potfiles
    file_list = self.find_files(".")
  File "/Users/famronnebratt/PycharmProjects/CompValid3/venv/lib/python3.9/site-packages/django/core/management/commands/makemessages.py", line 543, in find_files
    ignored_roots = [
  File "/Users/famronnebratt/PycharmProjects/CompValid3/venv/lib/python3.9/site-packages/django/core/management/commands/makemessages.py", line 544, in <listcomp>
    os.path.normpath(p)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/posixpath.py", line 336, in normpath
    path = os.fspath(path)
TypeError: expected str, bytes or os.PathLike object, not list

Process finished with exit code 1

项目的settings.py相关配置如下：

from pathlib import Path
import os
from decouple import config
from unipath import Path
from django.utils.translation import gettext_lazy as _
import environ

env = environ.Env()
environ.Env.read_env()


BASE_DIR = Path(__file__).resolve().parent.parent
CORE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
LOCALE_PATHS = (
    os.path.join(BASE_DIR, 'locale/'),
)
LANGUAGE_CODE = 'en-us'

LANGUAGES = [
    ('en', _('English')),
    ('fr', _('French')),
]

TIME_ZONE = 'UTC'

USE_I18N = True

USE_TZ = True

STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles')
MEDIA_ROOT = [os.path.join(BASE_DIR, 'media')]

解决方法 #

错误根源在于MEDIA_ROOT的配置：你将它设置成了列表类型，但Django的makemessages命令在处理路径时，要求该参数为字符串类型。

修改settings.py中的MEDIA_ROOT配置，去掉方括号：

MEDIA_ROOT = os.path.join(BASE_DIR, 'media')

修改完成后，重新执行命令：

python manage.py makemessages -l fr

此时应该能正常生成法语对应的.po文件。

内容的提问来源于stack exchange，提问作者Jonas