def last_executed_query(self, cursor, sql, params):
"""
Returns a string of the query last executed by the given cursor, with
placeholders replaced with actual values.
`sql` is the raw query containing placeholders, and `params` is the
sequence of parameters. These are used by default, but this method
exists for database backends to provide a better implementation
according to their own quoting schemes.
"""
# Convert params to contain Unicode values.
to_unicode = lambda s: force_text(s, strings_only=True, errors='replace')
if isinstance(params, (list, tuple)):
u_params = tuple(to_unicode(val) for val in params)
elif params is None:
u_params = ()
else:
u_params = {to_unicode(k): to_unicode(v) for k, v in params.items()}
return six.text_type("QUERY = %r - PARAMS = %r") % (sql, u_params)
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