Python Language Exceptions

Internal

• Python Language

Overview

try/except is a language-level mechanism to handle errors (traceback) that may be caused by a section of the code.

To trigger an exception manually in the code use raise.

To conditionally trigger an exception in the code, use assert.

try/except

try/except is a language-level mechanism to handle errors (traceback) that may be caused by a section of the code. This syntax eliminates tracebacks.

try:
  # do something
except:
  # execute if the previous block caused an error

assert

The assert statement can be used to trigger exceptions conditionally. It can be use with an optional error message:

assert s is not None

assert s is not None, 'The string was supposed to be set!'