how to wirte an if and only if statement in python code example

Example 1: if condition in print statement python

print (a if b else 0)

Example 2: if statement python

if (condition):
   result
    
else:
   result

Example 3: if statement python

x=1; y=0; z=0;
if 1 in {x,y,z}:
  print('At least one variable is equal to 1')