Are nested try/except blocks in python a good programming practice?

Question

I\'m writing my own container, which needs to give access to a dictionary inside by attribute calls. The typical use of the container would be like this:

dic         


        

Answer 1

A good and simple example for nested try/except could be the following:

import numpy as np

def divide(x, y):
    try:
        out = x/y
    except:
        try:
            out = np.inf * x / abs(x)
        except:
            out = np.nan
    finally:
        return out

Now try various combinations and you will get the correct result:

divide(15, 3)
# 5.0

divide(15, 0)
# inf

divide(-15, 0)
# -inf

divide(0, 0)
# nan

[of course we have numpy so we don't need to create this function]