x = [1, 2, 3]
y = x
y.append(4)

print(x)

This code will return [1, 2, 3, 4] but I want only [1, 2, 3].

This works like I want it to:

x = [1, 2, 3]
y = []
y[0] = x[0]
y[1] = x[1]
y[2] = x[2]
# Or use a for loop here, instead.

y.append(4)

print(x)

Also, is there a way to get the current values of the array:

x = [foo(), bar(), someOtherChangingNumber(), datetime.now()]
# y = x's values - not the functions


print(y)