Error when starting Django server in PyCharm?

Question

Django

When starting the Django server in PyCharm, an error crashes, what could be the problem?

Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x1040e7730>
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/utils/autoreload.py", line 226, in wrapper
    fn(*args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/core/management/commands/runserver.py", line 121, in inner_run
    self.check(display_num_errors=True)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/core/management/base.py", line 385, in check
    include_deployment_checks=include_deployment_checks,
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/core/management/base.py", line 372, in _run_checks
    return checks.run_checks(**kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/core/checks/registry.py", line 81, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/core/checks/model_checks.py", line 30, in check_all_models
    errors.extend(model.check(**kwargs))
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/models/base.py", line 1266, in check
    errors.extend(cls._check_fields(**kwargs))
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/models/base.py", line 1337, in _check_fields
    errors.extend(field.check(**kwargs))
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/models/fields/__init__.py", line 893, in check
    errors = super(AutoField, self).check(**kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/models/fields/__init__.py", line 208, in check
    errors.extend(self._check_backend_specific_checks(**kwargs))
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/models/fields/__init__.py", line 311, in _check_backend_specific_checks
    return connections[db].validation.check_field(self, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/backends/mysql/validation.py", line 41, in check_field
    field_type = field.db_type(connection)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/models/fields/__init__.py", line 629, in db_type
    return connection.data_types[self.get_internal_type()] % data
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/__init__.py", line 36, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/utils/functional.py", line 35, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/backends/mysql/base.py", line 185, in data_types
    if self.features.supports_microsecond_precision:
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/utils/functional.py", line 35, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/backends/mysql/features.py", line 54, in supports_microsecond_precision
    return self.connection.mysql_version >= (5, 6, 4) and Database.version_info >= (1, 2, 5)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/utils/functional.py", line 35, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/backends/mysql/base.py", line 369, in mysql_version
    with self.temporary_connection() as cursor:
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/contextlib.py", line 59, in __enter__
    return next(self.gen)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/backends/base/base.py", line 564, in temporary_connection
    cursor = self.cursor()
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/backends/base/base.py", line 231, in cursor
    cursor = self.make_debug_cursor(self._cursor())
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/backends/base/base.py", line 204, in _cursor
    self.ensure_connection()
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/backends/base/base.py", line 199, in ensure_connection
    self.connect()
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/backends/base/base.py", line 171, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/django/db/backends/mysql/base.py", line 265, in get_new_connection
    conn = Database.connect(**conn_params)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/MySQL_python-1.2.5-py3.5-macosx-10.6-intel.egg/MySQLdb/__init__.py", line 80, in Connect
    from MySQLdb.connections import Connection
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/MySQL_python-1.2.5-py3.5-macosx-10.6-intel.egg/MySQLdb/connections.py", line 36
    raise errorclass, errorvalue
                    ^
SyntaxError: invalid syntax

Answer 1

You are using python 3.5
And in python 3 the raise syntax has changed ( https://www.python.org/dev/peps/pep-3109/) , as I understand it.
And you need to change
raise errorclass, errorvalue
to
raise errorclass(errorvalue)
But as I understand it, this problem is in MySQL for python.
Apparently it's not compatible with python 3. Or something like that.
I am not an expert in python.