General Type Checks (int, str, tuple, etc.)

2006-01-28 Thread Fabian Steiner 
Hello!

So far, I am using something like »if isinstance(var, int):« to 
determine, whether var's value is an integer. Now I would like to know 
if there is any better possibility to do such general checks or may a 
construct with isinstance() even fail in certain cases?

Cheers,
Fabian
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Re: General Type Checks (int, str, tuple, etc.)

2006-01-28 Thread Scott David Daniels 
Fabian Steiner wrote:
 Hello!
 
 So far, I am using something like »if isinstance(var, int):« to 
 determine, whether var's value is an integer. Now I would like to know 
 if there is any better possibility to do such general checks or may a 
 construct with isinstance() even fail in certain cases?

The general rule is: don't check, let it fail if it wants to.
If you are looking for an integral value check, you might prefer:

isinstance(x, (int, long))

but again, think long and hard about your requirements.  Embrace
dynamic typing; don't try to write your old language in Python.

--Scott David Daniels
[EMAIL PROTECTED]
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