Why Python doesn't need a three-mesh operator and switch

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For the trinocular operator (ternary operator), Python can be replaced with conditional expressions

For example, x<5?1:0 can be implemented in the following way

1if X<5else 0

NOTE: Conditional expressions was introduced before Python 2.5, so the above code is only available for 2.5 and later versions

For versions prior to 2.5, you can use the following form

X<5and1or 0

For switch, we can use dictionary to achieve, see the following example

>>>def switch (choice): Return Dict (Enumerate (range (4))) [choice]>>> switch (1) >>> switch (0 ) values = {  value1:do_something1,  value2:do_something2,  ...  VALUEN:DO_SOMETHINGN,  }values.get (Var, do_default_something) ()

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