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Handling Exceptions - Part I

import math
def foo(x):
if not isinstance(x, int):
raise TypeError("arguments to foo must be integers")
if x <= 0:
raise ValueError("arguments to foo must be positive")
return(x + math.log(x))
foo(-3) # exception triggered and program halted
foo(3) # never executed
print("exception in sequence of foo() calls")
print("program resumes execution and is not terminated")
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