Problem with assignment. Python error or mine?

[MarkA]

On Thu, 21 Dec 2017 07:05:33 -0800, rafaeltfreire wrote:
>From docs.python.org:

8.10. copy — Shallow and deep copy operations

Source code: Lib/copy.py

Assignment statements in Python do not copy objects, they create bindings 
between a target and an object. For collections that are mutable or 
contain mutable items, a copy is sometimes needed so one can change one 
copy without changing the other. This module provides generic shallow and 
deep copy operations (explained below)...


> Dear community, I am having the following problem when I am assigning
> the elements of a vector below a certain number to zero or any other
> value.
> I am creating a new variable but Python edits the root variable. Why?
> 
> import numpy as np
> 
> X=np.arange(1, 10000, 1) #root variable x1=X x1[x1<10000]=0
> 
> print(X)
> Out[1]: array([ 0.,  0.,  0., ...,  0.,  0.,  0.])
> 
> Why????????? It is supposed to be the original value Thank you for your
> time Rafael



-- 
MarkA

We hang petty theives, and appoint the great theives to public office
  -- Aesop