How can i compare a string which is non null and empty

[Steven Howe]

how about just testing it's length?
 >>> from types import StringType

def stringTest(x):
...     if type(x) == StringType:
...             if len(x) == 0:
...                     print 'Empty String'
...             else:
...                     print 'Not Empty String'
...     else:
...             print 'value not String Type'
...
 lst = ['a','',5,(5,6),{'a':5}]
for item in lst:
...     stringTest(item)
...
Not Empty String
Empty String
value not String Type
value not String Type
value not String Type