does lack of type declarations make Python unsafe?
Irmen de Jong
irmen at -NOSPAM-REMOVETHIS-xs4all.nl
Sun Jun 15 23:30:26 CEST 2003
beliavsky at aol.com wrote:
> In Python, you don't declare the type of a variable, so AFAIK there is
> no way for the interpreter to check that you are calling functions
> with variables of the correct type.
Indeed, but then again, it usually doesn't have to :-)
Python is a dynamically typed language.
Python is also a strongly typed language.
Dynamic typing makes for very flexible and future-proof code.
To learn more about this, please read
> I have only been programming in Python for a few weeks -- am I right
> to worry?
No, there are thousands of Python programs that run just fine!
Python programmers feal perfectly at ease with Python's dynamic
type system. You just have to learn to understand and
> Are there techniques to ensure that functions are called with
> appropriate arguments?
You *can* test the types of the arguments yourself, inside
the function. But this is regarded bad practice amongst Python
programmers, for the above mentioned reasons.
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