9.8.3 Catching Multiple Exceptions in One except Clause

  • If several except suites are identical, you can catch those exception types by specifying them as a tuple in a single except handler:
    except (type1, type2, …) as variable_name:
  • as clause is optional
    • Typically, programs do not need to reference the caught exception object directly
    • Can use the variable in the as clause to reference the exception object in the except suite

9.8.4 What Exceptions Does a Function or Method Raise?

  • Before using any function or method, read its online API documentation
    • Specifies what exceptions are thrown (if any) by the function or method
    • Indicates reasons why such exceptions may occur
  • Next, read the online API documentation for each exception type to see potential reasons why such an exception occurs

9.8.5 What Code Should Be Placed in a try Suite?

  • For proper exception-handling granularity, each try statement should enclose a section of code small enough that, when an exception occurs, the specific context is known and the except handlers can process the exception properly
  • If many statements in a try suite raise the same exception types, multiple try statements may be required to determine each exception’s context

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