Hello! > The very strange thing which is happening here is you see variable > arr2 at ID id_ttt before changing the variable tt at the same ID (i.e. > id_ttt]) is showing some value but once I am printing its value after > assigning tt[id_ttt] = 0.0, arr2[id_ttt] is also showing 0 value > however, I have not touched arr2 anywhere as far as changing its > values are concerned.
The relevant lines are these: > def get_match(arr1, arr2, tol, itr): > tt = arr2 In python, this assignment doesn't make a copy, it makes `tt` and `arr2` refer to the same list. You can examine this with this little code. ``` arr = [1, 2, 3] arr_other = arr arr_other[1] = "different" print(arr_other) # This line prints the same print(arr) # array as this line. ``` Thus when you assign `tt = arr2`, modifying `tt` will modify `arr2`, and vice-versa. Cheers - DLD -- David Lowry-Duda <da...@lowryduda.com> <davidlowryduda.com> -- https://mail.python.org/mailman/listinfo/python-list
