raise Exception("Hello world")
Traceback (most recent call last):

  File "<ipython-input-24-dd3f3f45afbe>", line 1, in <module>
    raise Exception("Hello world")

Exception: Hello world

str(foo)
Out[27]: 'Hello world'

repr(foo)
Out[28]: "Exception('Hello world',)"

"{}".format(foo)
Out[29]: 'Hello world'

"{}: {}".format(type(foo), foo)
Out[30]: "<type 'exceptions.Exception'>: Hello world"

print('{}: {}'.format(type(exc).__name__, exc))

#test.py
import traceback

try :
    raise TypeError("Wrong Type baby!")

except Exception, e:
    print( "EXCEPTION FORMAT PRINT:n{}".format( e ) )
    print( "EXCEPTION TRACE  PRINT:n{}".format( traceback.format_exc(e) ) )

EXCEPTION FORMAT PRINT:
Wrong Type baby!
EXCEPTION TRACE  PRINT:
Traceback (most recent call last):
  File "/Users/me/test.py", line 4, in <module>
    raise TypeError("Wrong Type baby!")
TypeError: Wrong Type baby!