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Regarding Lambda Packages #2231

Description

@sridhar562345

Will this new version of Zappa support lambda_packages?
I have a dependency for mysqlclient failing with the below error.

[ERROR] ImproperlyConfigured: Error loading MySQLdb module.

Did you install mysqlclient?
Traceback (most recent call last):
  File "/var/task/handler.py", line 631, in lambda_handler
    return LambdaHandler.lambda_handler(event, context)
  File "/var/task/handler.py", line 242, in lambda_handler
    handler = cls()
  File "/var/task/handler.py", line 148, in __init__
    wsgi_app_function = get_django_wsgi(self.settings.DJANGO_SETTINGS)
  File "/var/task/zappa/ext/django_zappa.py", line 20, in get_django_wsgi
    return get_wsgi_application()
  File "/var/task/django/core/wsgi.py", line 12, in get_wsgi_application
    django.setup(set_prefix=False)
  File "/var/task/django/__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/var/task/django/apps/registry.py", line 114, in populate
    app_config.import_models()
  File "/var/task/django/apps/config.py", line 211, in import_models
    self.models_module = import_module(models_module_name)
  File "/var/lang/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 "/var/task/django/contrib/auth/models.py", line 2, in <module>
    from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
  File "/var/task/django/contrib/auth/base_user.py", line 47, in <module>
    class AbstractBaseUser(models.Model):
  File "/var/task/django/db/models/base.py", line 117, in __new__
    new_class.add_to_class('_meta', Options(meta, app_label))
  File "/var/task/django/db/models/base.py", line 321, in add_to_class
    value.contribute_to_class(cls, name)
  File "/var/task/django/db/models/options.py", line 204, in contribute_to_class
    self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
  File "/var/task/django/db/__init__.py", line 28, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "/var/task/django/db/utils.py", line 201, in __getitem__
    backend = load_backend(db['ENGINE'])
  File "/var/task/django/db/utils.py", line 110, in load_backend
    return import_module('%s.base' % backend_name)
  File "/var/lang/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "/var/task/django/db/backends/mysql/base.py", line 20, in <module>
    ) from err

Any ideas to include lambda_packages?

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