Randomly read only 50 % of files

Question

How can I randomly read 50% of the number of files:

files = glob.glob("*.txt")

##suppose files are objects

for fi in files:

    #I want to implement through the for loop

    data = np.genfromtxt(fi, ...)

Edit: I want to implement through the for loop, in my other problem, the files are object .

Random shuffle the file list and iterate over the first half of the elements. — Thomas Sablik, Feb 08 '21 at 13:59
@deceze You should post that as an answer; it's better than mine :) — Thomas, Feb 08 '21 at 14:11
What does that mean, "want to implement through the for loop"? — deceze, Feb 08 '21 at 14:13
@deceze supposing files are objects, I cannot use random.sample. But, for loop reads files one by one. So, I want a different mechanism to do it — Roman, Feb 08 '21 at 14:14
It's not really clear how those words go together. Have you tried `for fi in random.sample(files, len(files) // 2): ...` and what's the problem with it, if there is one? — deceze, Feb 08 '21 at 14:25

score 1 · Answer 1 · answered Feb 08 '21 at 13:59

1

Shuffle the files, then cut the list in half. Here, rounded down:

import random

files = glob.glob("*.txt")
random.shuffle(files)
files = files[:len(files) // 2]

for fi in files:

   data = np.genfromtxt(fi, ...)

answered Feb 08 '21 at 13:59

Thomas

174,939
50
355
478

I want to implement through the for loop, supposing files are objects – Roman Feb 08 '21 at 14:08

Randomly read only 50 % of files

1 Answers1