The list (array) inside a python function is taking value from previous instance of function call when the value is not passed as argument. For eg.
def abc(val, y=[]):
y.append(val)
return y
print(abc(3)) # Output: [3]
print(abc(4, [1,2])) # Output : [1, 2, 4]
print(abc(10)) # Output: [3, 10] # Expected value was [10]
Can anybody please explain why y holds value from previous call when it is not passed as argument?
