環(huán)境：win8-64位、python372、django1.11.4
場景：根據(jù)教程在虛擬環(huán)境中創(chuàng)建了一個新的空django工程媒抠，嘗試運(yùn)行以下命令：
python manage.py runserver
這個命令啟動網(wǎng)絡(luò)服務(wù)器蝇完，然而執(zhí)行后出現(xiàn)以下錯誤，且無法訪問127.0.0.1:8000：
(venv) C:\Workspace\Python\myproject\myproject>python manage.py runserver
Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x0000008F42BCED90>
Traceback (most recent call last):
? File "C:\Workspace\Python\myproject\venv\lib\site-packages\django\utils\autoreload.py", line 228, in wrapper
? ? fn(*args, **kwargs)
? File "C:\Workspace\Python\myproject\venv\lib\site-packages\django\core\management\commands\runserver.py", line 117, in inner_run? ? autoreload.raise_last_exception()
? File "C:\Workspace\Python\myproject\venv\lib\site-packages\django\utils\autoreload.py", line 251, in raise_last_exception
? ? six.reraise(*_exception)
? File "C:\Workspace\Python\myproject\venv\lib\site-packages\django\utils\six.py", line 685, in reraise
? ? raise value.with_traceback(tb)
? File "C:\Workspace\Python\myproject\venv\lib\site-packages\django\utils\autoreload.py", line 228, in wrapper
? ? fn(*args, **kwargs)
? File "C:\Workspace\Python\myproject\venv\lib\site-packages\django\__init__.py", line 27, in setup
? ? apps.populate(settings.INSTALLED_APPS)
? File "C:\Workspace\Python\myproject\venv\lib\site-packages\django\apps\registry.py", line 85, in populate
? ? app_config = AppConfig.create(entry)
? File "C:\Workspace\Python\myproject\venv\lib\site-packages\django\apps\config.py", line 94, in create
? ? module = import_module(entry)
? File "C:\Workspace\Python\myproject\venv\lib\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 "C:\Workspace\Python\myproject\venv\lib\site-packages\django\contrib\admin\__init__.py", line 4, in <module>
? ? from django.contrib.admin.filters import (
? File "C:\Workspace\Python\myproject\venv\lib\site-packages\django\contrib\admin\filters.py", line 10, in <module>
? ? from django.contrib.admin.options import IncorrectLookupParameters
? File "C:\Workspace\Python\myproject\venv\lib\site-packages\django\contrib\admin\options.py", line 12, in <module>
? ? from django.contrib.admin import helpers, widgets
? File "C:\Workspace\Python\myproject\venv\lib\site-packages\django\contrib\admin\widgets.py", line 151
? ? '%s=%s' % (k, v) for k, v in params.items(),
? ? ^
SyntaxError: Generator expression must be parenthesized
出現(xiàn)這個問題的原因是在\venv\lib\site-packages\django\contrib\admin\widgets.py文件中的line 151有以下語句語法錯誤：
'%s=%s' % (k, v) for k, v in params.items(),
此處末尾多了一個逗號
修改保存后重新執(zhí)行樊卓，問題解決拿愧，顯示如下信息：
(venv) C:\Workspace\Python\myproject\myproject>python manage.py runserver
Performing system checks...
System check identified no issues (0 silenced).
You have 13 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, sessions.
Run 'python manage.py migrate' to apply them.
January 19, 2019 - 22:57:49
Django version 1.11.4, using settings 'myproject.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.
[19/Jan/2019 23:01:51] "GET / HTTP/1.1" 200 1716
Not Found: /favicon.ico
[19/Jan/2019 23:01:51] "GET /favicon.ico HTTP/1.1" 404 1965
問題原因是python372與django1.11.4存在兼容問題
