Why python doesn't need ternary operator and switch

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For the ternary operator, python can use conditional expressions instead

For example, for x

1if x<5else 0

Note: conditional expressions were introduced before Python 2.5, so the above code only Applicable to 2.5 and later versions

For versions before 2.5, you can use the following form

X<5and1or 0

For switch, we can definitely Use dictionary to implement, look at 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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