dynamic type variable

J. Peng jpeng at block.duxieweb.com
Mon Jan 21 03:37:36 CET 2008

Python's variable is dynamic type,is it?
But why this can't work?

>>> 3 + 'a'
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: unsupported operand type(s) for +: 'int' and 'str'

So I see the number 3 can't be converted to string type automacially.

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