On Tuesday, May 17, 2022 at 7:11:24 AM UTC+8, hongy...@gmail.com wrote: > On Monday, May 16, 2022 at 11:27:58 PM UTC+8, Dennis Lee Bieber wrote: > > On Mon, 16 May 2022 02:03:26 -0700 (PDT), "hongy...@gmail.com" > > <hongy...@gmail.com> declaimed the following: > > > > > > >print(lst) > > > > Printing higher level structures uses the repr() of the structure and > > its contents -- theoretically a form that could be used within code as a > > literal. If you want human-readable str() you will need to write your own > > output loop to do the formatting of the structure, and explicitly print > > each item of the structure. > Thank you for your explanation. I have come up with the following methods: > ``` > 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]] > import numpy as np > from fractions import Fraction > import re > > def strmat(m): > if(np.array([m]).ndim==1): > return str(Fraction(m)) > else: return list(map(lambda L:strmat(L), np.array(m))) > > a=str(strmat(b)) > a=re.sub(r"'","",a) > repr(a) > print(repr(a)) > '[[0, -1, 0, 1/4], [1, 0, 0, 1/4], [0, 0, 1, 1/4], [0, 0, 0, 1]]' > ``` > Best, > HZ
See here [1] for the related discussion. [1] https://discuss.python.org/t/convert-the-decimal-numbers-expressed-in-a-numpy-ndarray-into-a-matrix-representing-elements-in-fractional-form/15780 -- https://mail.python.org/mailman/listinfo/python-list
