python - Pythonista way of extracting elements from an array -

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I am writing some python lines of code that do the following:

I have two arrays And in B, B (full strictly) increasing integers are not included.

I want to extract from those values ​​for which the value of b is greater than 20, but I do not want that duplicate, if B has values: ..., 40,40,41 , ... I just do not want the first value equal to 40 to the other.

This is the reason that a [b% 20 == 0] does not work.

I am using: 

  factor = [20 * i in xrange (1, for factors in int factors [0] [0] [0] [ 0] [0] [0] [0] [0] [0] [0] [/]>   
 
 
 
 
 
 
 
 
 
 
 
 
 
 -text "itemprop =" text ">   a [(b% 20 == 0 ) & Amp; Np.r_ [true, npdiiff (b)> gt;]

b% 20 == 0 div gives a binary mask Which selects all the elements of B, which is the factor of 20. NPR_ [true, np df (b) gt; 0] makes a binary mask that only elements Which separates from the previous element (we obviously add a truth in the beginning, because there is no previous element in the first element). Add masks together and add voice!


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