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Python Python Basics Functions and Looping Expecting Exceptions

Posted by Minseok Kim
Minseok Kim
2,708 Points

Value error, name error, type error?

What are these?

1 Answer

Alexander Davison
Alexander Davison
65,469 Points

As in most programming languages, Python has multiple kinds of errors.

  • ValueError usually refers to an invalid value passed into a function, e.g. if you try to execute the statement int('a'), Python will throw a ValueError ('a' is not appropriate for converting into an integer).
  • TypeError refers to a mismatch in types. (Types are the "kinds" of values, e.g. numbers [integers], decimals [floats], pieces of text [strings], etc.) For example, if you try to add an integer to a string, you get a TypeError.
  • Python throws a NameError if you try to access a non-existent variable.

A list of built-in errors can be found in the official Python documentation