iteration - Unexpected behaviour while iterating directories in python -


i'm making inventory of files in big library. idea write paths in column, parent directory of file in other colum, , files in other column.

i need write parent directory in corresponding cell each file , means writing folder's name many times there files inside it.

this have far:

import os import openpyxl  def crearlista (*arg, **kw):     inventario = openpyxl.workbook(encoding = "utf-8")     sheet = inventario.active     = 1     e = ""     dirpath, subdirs, files in os.walk("//media//rayeus/datos/mis documentos/nueva carpeta/", topdown=false):          name in subdirs:             e = os.path.join (name)           name in files:             sheet.cell(row=i, column=3).value = name             sheet.cell(row=i, column=1).value = dirpath             sheet.cell(row=i, column=2).value = e         = + 1

this works perfectly: iterates through every file in folder , writes name , dirpath in desired locations. problem starts iterating through files in first folder without filling e variable. first 3 rows in second column 3 blank cells, , after fills following cells name of folders in order (each 1 of names repeated many times number of files in next folder instead of number of files on correspondent folder)

essentially problem iterates through files in first folder before filling e variable correspondent folder name.

in other words, writing of files name , dirpath going 1 step further writing of parent directory messes second column completely.

example of output file: 

nueva carpeta/-assorted-/the.galactic.black.hole.lectures.on (3587) "          "    cover.jpg nueva carpeta/-assorted-/the.galactic.black.hole.lectures.on (3587) "          "    metadata.opf nueva carpeta/-assorted-/the.galactic.black.hole.lectures.on (3587) "          "    the.galactic.black.hole.lecture - -assorted-.pdf nueva carpeta/100 recetas de cocina espanola/http___www.recetas.net_admin_libros (5831) the.galactic.black.hole.lectures.on (3587)  cover.jpg nueva carpeta/100 recetas de cocina espanola/http___www.recetas.net_admin_libros (5831) the.galactic.black.hole.lectures.on (3587)  http___www.recetas.net_admin_li - 100 recetas de cocina espanola.pdf nueva carpeta/100 recetas de cocina espanola/http___www.recetas.net_admin_libros (5831) the.galactic.black.hole.lectures.on (3587)  metadata.opf

if file 'a/b/c/x.txt', dirpath 'a/b/c' , 'x.txt' should in files. basename(dirpath) return 'c'.
if dirpath ends slash 'a/b/c/', basename(dirpath) return '', empty string. in case, basename(dirname('a/b/c/')) return 'c'. 

from os.path import basename, dirname import openpyxl  def crearlista (*arg, **kw):     inventario = openpyxl.workbook(encoding = "utf-8")     sheet = inventario.active     = 1      dirpath, subdirs, files in os.walk("//media//rayeus/datos/mis documentos/nueva carpeta/", topdown=false):             file_dir = basename(dirpath) or dirname(basename(dirpath))         name in files:             sheet.cell(row=i, column=1).value = dirpath             sheet.cell(row=i, column=2).value = file_dir             sheet.cell(row=i, column=3).value = name             += 1

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