mysqlclient 1.3.13 or newer is required; you have 0.9.3.

python manage.py startapp myApp
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 "E:Python37libsite-packagesdjangocoremanagement\__init__.py", line 401, in execute_from_command_line
utility.execute()
File "E:Python37libsite-packagesdjangocoremanagement\__init__.py", line 377, in execute
django.setup()
File "E:Python37libsite-packagesdjango\__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "E:Python37libsite-packagesdjangoapps egistry.py", line 114, in populate
app_config.import_models()
File "E:Python37libsite-packagesdjangoappsconfig.py", line 211, in import_models
self.models_module = import_module(models_module_name)
File "E:Python37libimportlib\__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 "E:Python37libsite-packagesdjangocontribauthmodels.py", line 2, in <module>
from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
File "E:Python37libsite-packagesdjangocontribauthase_user.py", line 47, in <module>
class AbstractBaseUser(models.Model):
File "E:Python37libsite-packagesdjangodbmodelsase.py", line 121, in __new__
new_class.add_to_class('_meta', Options(meta, app_label))
File "E:Python37libsite-packagesdjangodbmodelsase.py", line 325, in add_to_class
value.contribute_to_class(cls, name)
File "E:Python37libsite-packagesdjangodbmodelsoptions.py", line 208, in contribute_to_class
self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
File "E:Python37libsite-packagesdjangodb\__init__.py", line 28, in __getattr__
return getattr(connections[DEFAULT_DB_ALIAS], item)
File "E:Python37libsite-packagesdjangodbutils.py", line 207, in __getitem__
backend = load_backend(db['ENGINE'])
File "E:Python37libsite-packagesdjangodbutils.py", line 111, in load_backend
return import_module('%s.base' % backend_name)
File "E:Python37libimportlib\__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "E:Python37libsite-packagesdjangodbackendsmysqlase.py", line 37, in <module>
raise ImproperlyConfigured('mysqlclient 1.3.13 or newer is required; you have %s.' % Database.__version__)
django.core.exceptions.ImproperlyConfigured: mysqlclient 1.3.13 or newer is required; you have 0.9.3.

解决办法：__init__.py文件中

import pymysql
pymysql.version_info = (1, 4, 6, 'final', 0)  # change mysqlclient version
pymysql.install_as_MySQLdb()

参考博客（其中还有其他解决办法，但未亲测）：https://www.cnblogs.com/allen2333/p/11754161.html