refactor exception handler #20
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If an except clause needs to catch multiple exceptions, they must be expressed as a parenthesized tuple, for example: ``except (ValueError, TypeError)`` You can look at the docs [here](https://docs.python.org/3/tutorial/errors.html#handling-exceptions). When `or` is used, only the first operand exception type of the conditional statement will be caught.
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If an except clause needs to catch multiple exceptions, they must be expressed as a parenthesized tuple, for example:
except (ValueError, TypeError)You can look at the docs here.
When
oris used, only the first operand exception type of the conditional statement will be caught.