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
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