os walk without digging into directories below

Question

How do I limit os walk to only return files in the directory I provide it   def  dir list self  dir name  whitelist       outputList          for root  dirs  files in os walk dir name           for f in files              if os path splitext f  1  in whitelist                  outputList append os path join root  f               else                  self  email to   ignore       return outputList

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create a list of excludes  use fnmatch to skip the directory structure and do the process  excludes    a   b    c d e   for root  directories  files in os walk  Start Folder        if not any fnmatch fnmatch nf root  pattern  for pattern in excludes           for root  directories  files in os walk nf root                                do the process                    same as for  includes    if   any   fnmatch fnmatch nf root  pattern  for pattern in   includes

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In Python 3  I was able to do this   import os dir     path to files     List all files immediately under this folder  print   next  os walk dir    2      List all folders immediately under this folder  print   next  os walk dir    1

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This is how I solved it  if recursive      items   os walk target directory  else      items    next os walk target directory

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Don t use os walk   Example   import os  root    C     for item in os listdir root       if os path isfile os path join root  item            print item

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for path  dirs  files in os walk           print path  dirs  files     del dirs      go only one level deep

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This is a nice python example def walk with depth root path  depth           if depth  lt  0              for root  dirs  files in os walk root path                   yield  root  dirs     files               return          elif depth    0              return          base depth   root path rstrip os path sep  count os path sep          for root  dirs  files in os walk root path               yield  root  dirs     files               cur depth   root count os path sep                           if base depth   depth  lt   cur depth                  del dirs

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If you have more complex requirements than just the top directory  eg ignore VCS dirs etc   you can also modify the list of directories to prevent os walk recursing through them   ie   def  dir list self  dir name  whitelist       outputList          for root  dirs  files in os walk dir name           dirs       d for d in dirs if is good d           for f in files              do stuff     Note - be careful to mutate the list  rather than just rebind it   Obviously os walk doesn t know about the external rebinding

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You could use os listdir   which returns a list of names  for both files and directories  in a given directory  If you need to distinguish between files and directories  call os stat   on each name

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create a list of excludes  use fnmatch to skip the directory structure and do the process  excludes    a   b    c d e   for root  directories  files in os walk  Start Folder        if not any fnmatch fnmatch nf root  pattern  for pattern in excludes           for root  directories  files in os walk nf root                                do the process                    same as for  includes    if   any   fnmatch fnmatch nf root  pattern  for pattern in   includes

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There is a catch when using listdir   The os path isdir identifier  must be an absolute path   To pick subdirectories you do   for dirname in os listdir rootdir     if os path isdir os path join rootdir  dirname         print  I got a subdirectory   s    dirname    The alternative is to change to the directory to do the testing without the os path join

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This is a nice python example def walk with depth root path  depth           if depth  lt  0              for root  dirs  files in os walk root path                   yield  root  dirs     files               return          elif depth    0              return          base depth   root path rstrip os path sep  count os path sep          for root  dirs  files in os walk root path               yield  root  dirs     files               cur depth   root count os path sep                           if base depth   depth  lt   cur depth                  del dirs

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In Python 3  I was able to do this   import os dir     path to files     List all files immediately under this folder  print   next  os walk dir    2      List all folders immediately under this folder  print   next  os walk dir    1

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Why not simply use a range and os walk combined with the zip  Is not the best solution  but would work too   For example like this     your part before for count   root  dirs  files  in zip range 0  1   os walk dir name          logic stuff   your later part   Works for me on python 3   Also  A break is simpler too btw   Look at the answer from  Pieter

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You could use os listdir   which returns a list of names  for both files and directories  in a given directory  If you need to distinguish between files and directories  call os stat   on each name

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import os  def listFiles self  dir name       names          for root  directory  files in os walk dir name           if root    dir name              for name in files                  names append name      return names

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The same idea with listdir  but shorter    f for f in os listdir root dir  if os path isfile os path join root dir  f

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Don t use os walk   Example   import os  root    C     for item in os listdir root       if os path isfile os path join root  item            print item

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I think the solution is actually very simple   use   break   to only do first iteration of the for loop  there must be a more elegant way   for root  dirs  files in os walk dir name       for f in files                              break       The first time you call os walk  it returns tulips for the current directory  then on next loop the contents of the next directory     Take original script and just add a break   def  dir list self  dir name  whitelist       outputList          for root  dirs  files in os walk dir name           for f in files              if os path splitext f  1  in whitelist                  outputList append os path join root  f               else                  self  email to   ignore           break     return outputList

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for path  dirs  files in os walk           print path  dirs  files     del dirs      go only one level deep

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The suggestion to use listdir is a good one   The direct answer to your question in Python 2 is root  dirs  files   os walk dir name  next     The equivalent Python 3 syntax is root  dirs  files   next os walk dir name

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root folder changes for every directory os walk finds  I solver that checking if root    directory  def  dir list self  dir name  whitelist       outputList          for root  dirs  files in os walk dir name           if root    dir name   This only meet parent folder             for f in files                  if os path splitext f  1  in whitelist                      outputList append os path join root  f                   else                      self  email to   ignore       return outputList

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If you have more complex requirements than just the top directory  eg ignore VCS dirs etc   you can also modify the list of directories to prevent os walk recursing through them   ie   def  dir list self  dir name  whitelist       outputList          for root  dirs  files in os walk dir name           dirs       d for d in dirs if is good d           for f in files              do stuff     Note - be careful to mutate the list  rather than just rebind it   Obviously os walk doesn t know about the external rebinding

User · Answer

There is a catch when using listdir   The os path isdir identifier  must be an absolute path   To pick subdirectories you do   for dirname in os listdir rootdir     if os path isdir os path join rootdir  dirname         print  I got a subdirectory   s    dirname    The alternative is to change to the directory to do the testing without the os path join

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Use the walklevel function   import os  def walklevel some dir  level 1       some dir   some dir rstrip os path sep      assert os path isdir some dir      num sep   some dir count os path sep      for root  dirs  files in os walk some dir           yield root  dirs  files         num sep this   root count os path sep          if num sep   level  lt   num sep this              del dirs      It works just like os walk  but you can pass it a level parameter that indicates how deep the recursion will go

User · Answer

Why not simply use a range and os walk combined with the zip  Is not the best solution  but would work too   For example like this     your part before for count   root  dirs  files  in zip range 0  1   os walk dir name          logic stuff   your later part   Works for me on python 3   Also  A break is simpler too btw   Look at the answer from  Pieter

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A slight change to Alex s answer  but using   next       print next os walk  d      2   or    print os walk  d       next     2    with the  2  being the file in root  dirs  file mentioned in other answers

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If you have more complex requirements than just the top directory  eg ignore VCS dirs etc   you can also modify the list of directories to prevent os walk recursing through them   ie   def  dir list self  dir name  whitelist       outputList          for root  dirs  files in os walk dir name           dirs       d for d in dirs if is good d           for f in files              do stuff     Note - be careful to mutate the list  rather than just rebind it   Obviously os walk doesn t know about the external rebinding

User · Answer

The suggestion to use listdir is a good one   The direct answer to your question in Python 2 is root  dirs  files   os walk dir name  next     The equivalent Python 3 syntax is root  dirs  files   next os walk dir name

User · Answer

This is how I solved it  if recursive      items   os walk target directory  else      items    next os walk target directory

User · Answer

A slight change to Alex s answer  but using   next       print next os walk  d      2   or    print os walk  d       next     2    with the  2  being the file in root  dirs  file mentioned in other answers

User · Answer

You could use os listdir   which returns a list of names  for both files and directories  in a given directory  If you need to distinguish between files and directories  call os stat   on each name

User · Answer

Don t use os walk   Example   import os  root    C     for item in os listdir root       if os path isfile os path join root  item            print item

User · Answer

import os  def listFiles self  dir name       names          for root  directory  files in os walk dir name           if root    dir name              for name in files                  names append name      return names

User · Answer

The suggestion to use listdir is a good one   The direct answer to your question in Python 2 is root  dirs  files   os walk dir name  next     The equivalent Python 3 syntax is root  dirs  files   next os walk dir name

User · Answer

Use the walklevel function   import os  def walklevel some dir  level 1       some dir   some dir rstrip os path sep      assert os path isdir some dir      num sep   some dir count os path sep      for root  dirs  files in os walk some dir           yield root  dirs  files         num sep this   root count os path sep          if num sep   level  lt   num sep this              del dirs      It works just like os walk  but you can pass it a level parameter that indicates how deep the recursion will go

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You could also do the following   for path  subdirs  files in os walk dir name       for name in files          if path          this will filter the files in the current directory               code here

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You can use this snippet  for root  dirs  files in os walk directory       if level  gt  0            do some stuff     else          break     level- 1

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Felt like throwing my 2 pence in   baselevel   len rootdir split        for subdirs  dirs  files in os walk rootdir       curlevel   len subdirs split            if curlevel  lt   baselevel   1           do stuff

User · Answer

Use the walklevel function   import os  def walklevel some dir  level 1       some dir   some dir rstrip os path sep      assert os path isdir some dir      num sep   some dir count os path sep      for root  dirs  files in os walk some dir           yield root  dirs  files         num sep this   root count os path sep          if num sep   level  lt   num sep this              del dirs      It works just like os walk  but you can pass it a level parameter that indicates how deep the recursion will go

User · Answer

Felt like throwing my 2 pence in   baselevel   len rootdir split        for subdirs  dirs  files in os walk rootdir       curlevel   len subdirs split            if curlevel  lt   baselevel   1           do stuff

User · Answer

You could use os listdir   which returns a list of names  for both files and directories  in a given directory  If you need to distinguish between files and directories  call os stat   on each name

User · Answer

Since Python 3 5 you can use os scandir instead of os listdir  Instead of strings you get an iterator of DirEntry objects in return  From the docs      Using scandir   instead of listdir   can significantly increase the performance of code that also needs file type or file attribute information  because DirEntry objects expose this information if the operating system provides it when scanning a directory  All DirEntry methods may perform a system call  but is dir   and is file   usually only require a system call for symbolic links  DirEntry stat   always requires a system call on Unix but only requires one for symbolic links on Windows    You can access the name of the object via DirEntry name which is then equivalent to the output of os listdir

User · Answer

Use the walklevel function   import os  def walklevel some dir  level 1       some dir   some dir rstrip os path sep      assert os path isdir some dir      num sep   some dir count os path sep      for root  dirs  files in os walk some dir           yield root  dirs  files         num sep this   root count os path sep          if num sep   level  lt   num sep this              del dirs      It works just like os walk  but you can pass it a level parameter that indicates how deep the recursion will go

User · Answer

I think the solution is actually very simple   use   break   to only do first iteration of the for loop  there must be a more elegant way   for root  dirs  files in os walk dir name       for f in files                              break       The first time you call os walk  it returns tulips for the current directory  then on next loop the contents of the next directory     Take original script and just add a break   def  dir list self  dir name  whitelist       outputList          for root  dirs  files in os walk dir name           for f in files              if os path splitext f  1  in whitelist                  outputList append os path join root  f               else                  self  email to   ignore           break     return outputList

User · Answer

If you have more complex requirements than just the top directory  eg ignore VCS dirs etc   you can also modify the list of directories to prevent os walk recursing through them   ie   def  dir list self  dir name  whitelist       outputList          for root  dirs  files in os walk dir name           dirs       d for d in dirs if is good d           for f in files              do stuff     Note - be careful to mutate the list  rather than just rebind it   Obviously os walk doesn t know about the external rebinding

User · Answer

Since Python 3 5 you can use os scandir instead of os listdir  Instead of strings you get an iterator of DirEntry objects in return  From the docs      Using scandir   instead of listdir   can significantly increase the performance of code that also needs file type or file attribute information  because DirEntry objects expose this information if the operating system provides it when scanning a directory  All DirEntry methods may perform a system call  but is dir   and is file   usually only require a system call for symbolic links  DirEntry stat   always requires a system call on Unix but only requires one for symbolic links on Windows    You can access the name of the object via DirEntry name which is then equivalent to the output of os listdir

User · Answer

root folder changes for every directory os walk finds  I solver that checking if root    directory  def  dir list self  dir name  whitelist       outputList          for root  dirs  files in os walk dir name           if root    dir name   This only meet parent folder             for f in files                  if os path splitext f  1  in whitelist                      outputList append os path join root  f                   else                      self  email to   ignore       return outputList

User · Answer

The same idea with listdir  but shorter    f for f in os listdir root dir  if os path isfile os path join root dir  f

User · Answer

The suggestion to use listdir is a good one   The direct answer to your question in Python 2 is root  dirs  files   os walk dir name  next     The equivalent Python 3 syntax is root  dirs  files   next os walk dir name

User · Answer

You could also do the following   for path  subdirs  files in os walk dir name       for name in files          if path          this will filter the files in the current directory               code here

User · Answer

Don t use os walk   Example   import os  root    C     for item in os listdir root       if os path isfile os path join root  item            print item

User · Answer

You can use this snippet  for root  dirs  files in os walk directory       if level  gt  0            do some stuff     else          break     level- 1

[python] os.walk without digging into directories below

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