How to use the psycopg.types function in psycopg
To help you get started, we’ve selected a few psycopg examples, based on popular ways it is used in public projects.
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django / django / django / db / backends / postgresql / base.py View on Github 
if not s and not isinstance(s, str):
return s
return smart_unicode(s)
# Register these custom typecasts, because Django expects dates/times to be
# in Python's native (standard-library) datetime/time format, whereas psycopg
# use mx.DateTime by default.
try:
Database.register_type(Database.new_type((1082,), "DATE", util.typecast_date))
except AttributeError:
raise Exception("You appear to be using psycopg version 2. Set your DATABASES.ENGINE to 'postgresql_psycopg2' instead of 'postgresql'.")
Database.register_type(Database.new_type((1083,1266), "TIME", util.typecast_time))
Database.register_type(Database.new_type((1114,1184), "TIMESTAMP", util.typecast_timestamp))
Database.register_type(Database.new_type((16,), "BOOLEAN", util.typecast_boolean))
Database.register_type(Database.new_type((1700,), "NUMERIC", util.typecast_decimal))
Database.register_type(Database.new_type(Database.types[1043].values, 'STRING', typecast_string))
