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Python :=

#The walrus operator := assigns values to variables as part of a larger expression.
#In this example, the assignment expression helps avoid calling len() twice:

if (n := len(a)) > 10:
    print(f"List is too long ({n} elements, expected <= 10)")
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python ->

def func(x): -> int
  return x

# it annotates the return type of the function.
# Doesn't force the return type.
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python <>

a = 1
b = 2

if a != b:
 print("Dunno")

if a <> b:
 print("Dunno")


above mentioned code are same As described in the documentation, 
they are the same. <> is deprecated and was removed in Python 3, 
so you should use !=

https://docs.python.org/2/reference/expressions.html#not-in
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