Convert bash script to python -

i have bash script , want convert python.

this script :

mv $1/positive/*.$3 $2/jpegimages mv $1/negative/*.$3 $2/jpegimages mv $1/positive/annotations/*.xml $2/annotations mv $1/negative/annotations/*.xml $2/annotations cut -d' ' -f1 $1/positive_label.txt > $4_trainval.txt 

my problem : didn't found how past positive_label.txt in $4_trainval.txt.

this try, it's first time work python. please me make work. thank you.

import sys # required reading command line arguments import os # required path manipulations os.path import expanduser # required expanding '~', stands home folder. used in case command line arguments contain "~". without this, python won't parse "~" import glob import shutil   def copy_dataset(arg1,arg2,arg3,arg4):     path1 = os.path.expanduser(arg1)     path2 = os.path.expanduser(arg2) #      frame_ext = arg3 # file extension of patches       pos_files = glob.glob(os.path.join(path1,'positive/'+'*.'+frame_ext))     neg_files = glob.glob(os.path.join(path1,'negative/'+'*.'+frame_ext))     pos_annotation = glob.glob(os.path.join(path1,'positive/annotations/'+'*.'+xml))     neg_annotation = glob.glob(os.path.join(path1,'negative/annotations/'+'*.'+xml))      #mv $1/positive/*.$3 $2/jpegimages     x in pos_files:         shutil.copyfile(x, os.path.join(path2,'jpegimages'))      #mv $1/negative/*.$3 $2/jpegimages     y in neg_files:         shutil.copyfile(y, os.path.join(path2,'jpegimages'))      #mv $1/positive/annotations/*.xml $2/annotations     w in pos_annotation:         shutil.copyfile(w, os.path.join(path2,'annotations'))      #mv $1/negative/annotations/*.xml $2/annotations     z in neg_annotation:         shutil.copyfile(z, os.path.join(path2,'annotations'))      #cut -d' ' -f1 $1/positive_label.txt > $4_trainval.txt     line in open(path1+'/positive_label.txt')         line.split(' ')[0] 

without testing, should works.

#cut -d' ' -f1 $1/positive_label.txt > $4_trainval.txt positive = path1+'/positive_label.txt' path4 = os.path.join(arg4, '_trainval.txt')  open(positive, 'r') input_, open(path4, 'w') output_:     line in input_.readlines():         output_.write(line.split()[0] + "\n") 

this code defines 2 files work , opens both. first opened in read mode, second in write mode. each line in input file, write first find data separated space output file.

check reading , writing files in python more informations files python.