import os
import glob
rootpath='.'
for root, dirs, files in os.walk(rootpath):
    for file_ in files:
        file_path=os.path.join(root,file_)
        print file_path 

import os
import glob
rootpath='.'
for root, dirs, files in os.walk(rootpath):
    for file_ in files:
        file_path=os.path.join(root,file_).split('/')[-1]
        print file_path

import os
import glob
path='.'
for root, dirs, files in os.walk(path):
    for dir_ in dirs:
        dir_path=os.path.join(root,dir_)
        for table in glob.glob(dir_path+'/*.tab'):
            print table

>>> num=1
>>> "{0,04d}".format(num)
'0001'

>>> num=1
>>> "{0,4d}".format(num)
'   1'

>>> char='1'
>>> char.zfill(4)
'0001'

>>> import re
>>> hoge='1257cfnewoaij2203'
>>> suuji=re.findall("(\d+)",hoge)
>>> print suuji
'1257' '2203'

for line in open('test.tab', 'r'):
    itemList = line[:-1].split()
    print itemList

>>> import numpy as np
>>> data=np.loadtxt('input.txt').T

f=open('output.txt','w')
f.write(moji+'\n')
f.close()

>>> np.savetxt('output.txt',data.T)

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