In Python, what's the difference between 'except Exception as e' and 'except Exception, e'
Question:
In python, there are two ways to catch an exception
except Exception, e:
except Exception as e:
It seems like ‘as e’ is the one to use going forward. In what version of python did this change? Any idea why?
Answers:
This PEP introduces changes intended to help eliminate ambiguities in Python’s grammar, simplify exception classes, simplify garbage collection for exceptions and reduce the size of the language in Python 3.0.
The first proposal for using the “as” is here: http://mail.python.org/pipermail/python-dev/2006-March/062449.html.
They thought it would be more intuitive to read the code
Short answer for the why: Exception, e and Exception, TypeError are hard to tell apart. Long answer: what Ignacio said.
In python, there are two ways to catch an exception
except Exception, e:
except Exception as e:
It seems like ‘as e’ is the one to use going forward. In what version of python did this change? Any idea why?
This PEP introduces changes intended to help eliminate ambiguities in Python’s grammar, simplify exception classes, simplify garbage collection for exceptions and reduce the size of the language in Python 3.0.
The first proposal for using the “as” is here: http://mail.python.org/pipermail/python-dev/2006-March/062449.html.
They thought it would be more intuitive to read the code
Short answer for the why: Exception, e and Exception, TypeError are hard to tell apart. Long answer: what Ignacio said.