CODEWITHSUNDEEP
pythontype-conversionscientific-notation
Soodep Dhakal
Soodep Dhakal

Reputation: 25

How to convert scientific notation value to float

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))

Upvotes: 1

Views: 2392

Answers (2)

Barmar
Barmar

Reputation: 780655

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(). And since fileinput allows you to give it a list of files, you don't need the for loop.

import fileinput
from glob import glob


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

Upvotes: 4

saeedhosseini
saeedhosseini

Reputation: 82

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]

Upvotes: 1

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