How to check if a string "is" an int?

Erik Max Francis max at alcyone.com
Wed Dec 21 22:58:01 CET 2005


Steven D'Aprano wrote:

> In that case, the name is misleadingly wrong. I suppose it is not likely
> that it could be changed before Python 3?

Why?

The primary purpose of the .isdigit, etc. methods is to test whether a 
single character has a certain property.  There is, however, no special 
character data type in Python, and so by necessity those methods must be 
on strings, not characters.

Thus, you have basically two choices:  Have the methods throw exceptions 
for strings with a length different from one, or have them just iterate 
over every character in a string.  The latter is clearly a more useful 
functionality.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Make it come down / Like molasses rain
   -- Sandra St. Victor



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