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It is worth noting that the else clause can also be used with while loops. [1]: https://docs.python.org/3.6/reference/compound_stmts.html#while https://docs.py

It is worth noting that the else clause can also be used with while loops. [1]: https://docs.python.org/3.6/reference/compound_stmts.html#while https://docs.python.org/3.6/reference/compound_stmts.html#wh...

kasbah 8y ago
Seems a bit useless since while x < 2: ... else: print('>= 2') is the same as while x < 2: ... print('>= 2') unless you use a break. Just seems unnecessarily confusing to me. I have used for ... else though.
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- znpy 8y ago
  I think that the subtle difference is that in the second example "print('>= 2')" is always executed whereas in the first example the print statements is executed only if no break was executed in the while loop. Quoting documentation: "A break statement executed in the first suite terminates the loop without executing the else clause’s suite."
  - kasbah 8y ago
    I did say "unless you use a break". I don't think this is very useful.
- jwilk 8y ago
  But... for+else without break can be rewritten the same way. And yet you claim that you've used for+else. But indeed, in my experience, while+else are much less common that for+else. I'm not sure why.
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ubernostrum 8y ago
And the full form of a Python exception handling block is not try/except/finally. It's try/except/else/finally. The 'try' block contains code which might raise an exception. It can be followed by zero or more 'except' blocks, each of which indicates the type(s) of exception it will catch and contains code to execute in the event of that type of exception. The 'except' block(s) can be followed by one 'else' block, which contains code to execute in the event no exception was raised by the code in the 'try' block. And then there is optionally a 'finally' block, containing code that must be executed in all circumstances.

kasbah 8y ago

Seems a bit useless since while x < 2: ... else: print('>= 2') is the same as while x < 2: ... print('>= 2') unless you use a break. Just seems unnecessarily confusing to me. I have used for ... else though.

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znpy 8y ago
I think that the subtle difference is that in the second example "print('>= 2')" is always executed whereas in the first example the print statements is executed only if no break was executed in the while loop. Quoting documentation: "A break statement executed in the first suite terminates the loop without executing the else clause’s suite."
- kasbah 8y ago
  I did say "unless you use a break". I don't think this is very useful.
jwilk 8y ago
But... for+else without break can be rewritten the same way. And yet you claim that you've used for+else. But indeed, in my experience, while+else are much less common that for+else. I'm not sure why.

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ubernostrum 8y ago

And the full form of a Python exception handling block is not try/except/finally. It's try/except/else/finally. The 'try' block contains code which might raise an exception. It can be followed by zero or more 'except' blocks, each of which indicates the type(s) of exception it will catch and contains code to execute in the event of that type of exception. The 'except' block(s) can be followed by one 'else' block, which contains code to execute in the event no exception was raised by the code in the 'try' block. And then there is optionally a 'finally' block, containing code that must be executed in all circumstances.