from __future__ import annotations

class X :
    str_myField = "" 
     # parameterized constructor 
    def __init__(self, str_myField ): 
        self.str_myField =str_myField 
    def isEqual(x1 : X,x2: X ):
        return x1.myField == x2.myField 
        
X_a = X();
X_a.str_myField ="a"

X_b = X();
X_b.str_myField ="b"
print(">>"+X.isEqual(X_a,X_b))