Removed double import in mysql base.py

    from django.core.exceptions import ImproperlyConfigured

    raise ImproperlyConfigured("Error loading MySQLdb module: %s" % e)

from django.utils.functional import cached_property

# We want version (1, 2, 1, 'final', 2) or later. We can't just use

# lexicographic ordering in this check because then (1, 2, 1, 'gamma')

# inadvertently passes the version test.