Convert the decimal numbers expressed in a `numpy.ndarray` into a matrix representing elements in fractional form

[hongy...@gmail.com]

On Thursday, May 19, 2022 at 5:26:25 AM UTC+8, Cousin Stanley wrote:
> #!/usr/bin/env python3 
> 
> ''' 
> NewsGroup .... comp.lang.python 
> 
> Subject ...... Convert the decimal numbers
> expressed in a numpy.ndarray 
> into a matrix representing elements 
> in fractiona
> Date ......... 2022-05-16 
> 
> Post_By ...... hongy... 
> 
> Edit_By ...... Stanley C. Kitching 
> '''
> import numpy as np 
> 
> from fractions import Fraction
> b = [ 
> [ 0.0 , -1.0 , 0.0 , 0.25 ] , 
> [ 1.0 , 0.0 , 0.0 , 0.25 ] , 
> [ 0.0 , 0.0 , 1.0 , 0.25 ] , 
> [ 0.0 , 0.0 , 0.0 , 1.0 ] ] 
> 
> a = [ ] 
> 
> print( '\n b .... \n' ) 
> 
> for row in b : 
> arow = [] 
> print( ' ' , row ) 
> 
> for dec_x in row : 
> frac_x = Fraction( dec_x ) 
> arow.append( frac_x ) 
> 
> a.append( arow ) 
> 
> 
> # using f-string format 
> 
> print( '\n a .... \n' ) 
> 
> for row in a : 
> 
> for item in row : 
> 
> print( f' {item} ' , end = '' ) 
> 
> print() 
> 
> # ------------------------------------------ 

This method doesn't work, as shown below:


 b .... 

  [0.0, -1.0, 0.0, 0.25]
  [1.0, 0.0, 0.0, 0.25]
  [0.0, 0.0, 1.0, 0.25]
  [0.0, 0.0, 0.0, 1.0]

 a .... 

 0  0  0  1 


 
> -- 
> Stanley C. Kitching 
> Human Being 
> Phoenix, Arizona