import MySQLdb

conn = MySQLdb.Connect(

                       host = '127.0.0.1',

                       port = 3306,

                       user = 'root',

                       passwd = '',

                       db = 'imooc',

                       charset = 'utf8'

                       )

cursor = conn.cursor()

print conn

print cursor

cursor.close()

conn.close()

提示

Traceback (most recent call last):

  File "D:\eclipseee\immoc\com\imooc\test_connecton.py", line 9, in <module>

    charset = 'utf8'

  File "C:\Python27\lib\site-packages\MySQLdb\__init__.py", line 81, in Connect

    return Connection(*args, **kwargs)

  File "C:\Python27\lib\site-packages\MySQLdb\connections.py", line 193, in __init__

    super(Connection, self).__init__(*args, **kwargs2)

_mysql_exceptions.OperationalError: (1049, "Unknown database 'imooc'")

 IMOOC数据库已经创建，但是如果将IMOOC改成MYSQL或者系统默认的就可以运行，自己添加到都无法运行 请问为什么