Python: Check if a String is an Integer

A handy way of checking if a string can be converted into an integer is to use isdigit(), which will will return a boolean value.

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1.if self.something.isdigit():

2.  try:

3.    id = int(self.something)

4.    return ModelName.objects.get(id = id)

5.  except ModelName.DoesNotExist:

6.    return None;

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