Function double_first

0a_error_handling/python/boilerplate.py:1–9

(vec)

def double_first(vec):
    try:
        first = vec[0]
        parsed = int(first)
        return parsed * 2
    except IndexError:
        print("no first item")
    except ValueError:
        print("invalid first item")


if __name__ == '__main__':