如何将科学记数法值转换为浮点数

Question

I have txt files in the format:

 6.3894e+02 1.7316e+02 6.6733e+02 1.9942e+02 9.8697e-01
 6.4355e+02 1.7514e+02 6.8835e+02 2.0528e+02 9.7908e-01

I want to convert all these values into float as in:

 638.94 173.16 667.33 199.42 98.697
 643.55 175.14 688.35 205.28 97.908

My code is:

   import os
   for i in os.listdir():
       if i.endswith(".txt"):
          with open(i, "r+") as f:
               content = f.readlines()
               for line in content:
                   f.write(float(line))

Answer 1

You can't update a file in place like that. You can use the fileinput module for that.

You need to split the line at whitespace, parse each of the numbers as floats, then write them the way you want.

You can also use glob() to match all the .txt files instead of using os.listdir() and .endswith() .

import fileinput
from glob import glob

for i in glob("*.txt"):
    with fileinput.input(files=i, inplace=True) as f:
        for line in f:
            nums = map(float, line.split())
            print(*nums)

Answer 2

Try something like this for all the rows:

   text = "6.3894e+02 1.7316e+02 6.6733e+02 1.9942e+02 9.8697e-01"
    numbers = text.split()
    numbers_float = [float(x) for x in numbers]