Python：用分数或浮点数读入文件，将其视为浮点数

问题:

with open(input, "rt") as f:
X = [map(float, line.split()) for line in f.readlines()[1:R]]  <<problem here
X = asarray(X, dtype=float) 

我该如何解决这个问题？（这样它可以读取分数和浮点数，并在读取时将这些分数转换为浮点数）

所以你需要

X = [[float(Fraction(x)) for x in line.split()] for line in f.readlines()[1:R]]

注意：为了避免制作整个文件的临时列表，最好使用

from itertools import islice
with open(input, "rt") as f:
    X = [[float(Fraction(x)) for x in line.split()] for line in islice(f, 1, R)]

所以你需要

X = [[float(Fraction(x)) for x in line.split()] for line in f.readlines()[1:R]]

注意：为了避免制作整个文件的临时列表，最好使用

from itertools import islice
with open(input, "rt") as f:
    X = [[float(Fraction(x)) for x in line.split()] for line in islice(f, 1, R)]