list - Python Iterate over a numbers in a txt file -

i have txt file similar following

example.txt

9987.000 2300 23 40 30  9654.988 1234 34 32 19 

i iterate on file , rewrite file sample.txt follows each number on own line listed vertically in order in listed horizontally.

9987.000 2300 23 40 30 

i new python , not sure best approach doing this. advice appreciated. syntax error

     file "sample.py", line 64         open('testfile.txt')as infile, open('testfile.txt','w') outfile:                                          ^      syntaxerror: invalid syntax   

for large files:

with open('path/to/input') infile, open('path/to/output', 'w') outfile:     line in infile:         num in line.strip().split():             outfile.write(num + '\n') 

for small files:

import itertools open('path/to/input') infile, open('path/to/output', 'w') outfile:     outfile.write('\n'.join(itertools.chain.from_iterable(line.strip().split() line in infile)))