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• Change variable name (in scope only)

examples/pycharm/calc.py

def add(x, y):
    z = x + y
    return z

def multiply(x, y):
    z = x * y
    return z

x = 2
y = 3
z = add(x, y)
print(z)

z = multiply(x, y)
print(z)

• Extract method