how to assign value to variables between if and elif statement?-CodePudding

how to assign value to variables between if and elif statement?

It shows me "An illegal target for a variable annotation" when I assgin b = 2 between if and elif. I do not want to assign b = 2 before if statement.

a = 1

if a > 1:
   print("something")

b = 2
elif b > 1:
   print("something")

CodePudding user response：

You can use Python's assignment expressions. They let you assign a variable within a conditional, then return the value assigned. Like this:

a = 1

if a > 1:
   print("something")
elif (b := 2) > 1:
   print("something")

If you wanted to only assign the variable b, but not use it within the conditional, then you could rewrite your code as this (it is fairly ugly, but works in all cases):

a = 1

if a > 1:
   print("something")
elif (b := 2, EXPRESSION TO TEST)[1]:
   print("something")

CodePudding user response：

You simply don't write elif in such case.
Instead you write else, do what you want and if:

a = 1

if a > 1:
   print("something")
else:
   b = 2
   if b > 1:
      print("something")