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The following program displays the directory structure of a specified path using ASCII characters. The program can optionally display files in addition to directories. This program functions similar to the windows 'tree' command.

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#! /usr/bin/env python

# tree.py
#
# Written by Doug Dahms
#
# Prints the tree structure for the path specified on the command line

from os import listdir, sep
from os.path import abspath, basename, isdir
from sys import argv

def tree(dir, padding, print_files=False):
    print padding[:-1] + '+-' + basename(abspath(dir)) + '/'
    padding = padding + ' '
    files = []
    if print_files:
        files = listdir(dir)
    else:
        files = [x for x in listdir(dir) if isdir(dir + sep + x)]
    count = 0
    for file in files:
        count += 1
        print padding + '|'
        path = dir + sep + file
        if isdir(path):
            if count == len(files):
                tree(path, padding + ' ', print_files)
            else:
                tree(path, padding + '|', print_files)
        else:
            print padding + '+-' + file

def usage():
    return '''Usage: %s [-f] <PATH>
Print tree structure of path specified.
Options:
-f      Print files as well as directories
PATH    Path to process''' % basename(argv[0])

def main():
    if len(argv) == 1:
        print usage()
    elif len(argv) == 2:
        # print just directories
        path = argv[1]
        if isdir(path):
            tree(path, ' ')
        else:
            print 'ERROR: \'' + path + '\' is not a directory'
    elif len(argv) == 3 and argv[1] == '-f':
        # print directories and files
        path = argv[2]
        if isdir(path):
            tree(path, ' ', True)
        else:
            print 'ERROR: \'' + path + '\' is not a directory'
    else:
        print usage()

if __name__ == '__main__':
    main()

For some of the projects I have worked on it is necessary to document the directory [and file] structure of a specified path. Manually creating a ASCII tree representation is laborious. In the windows world there exists the 'tree' command to handle this task. However in the Linux/Unix world I was not aware of an equivalent command. Thus I created this program.

5 comments

Keith Dart 13 years, 8 months ago  # | flag

There is a utility.... FYI:

rpm -qi tree-1.2-7mdk

Name        : tree                         Relocations: /usr
Version     : 1.2                               Vendor: (none)
Release     : 7mdk                          Build Date: Wed May  5 14:05:49 1999Install date: Fri Nov  5 05:54:15 1999      Build Host: k6.microsoft.sucks.eu.org
Group       : Applications/File             Source RPM: tree-1.2-7mdk.src.rpm
Size        : 21607                            License: GPL
Summary     : A utility which displays a tree view of the contents of directories.
Description :
The tree utility recursively displays the contents of directories in a
tree-like format.  Tree is basically a UNIX port of the tree DOS
utility.

Install tree if you think it would be useful to view the contents of
specified directories in a tree-like format.
Doug Dahms (author) 13 years, 8 months ago  # | flag

Thanks... Oh darn. Looks like I did it again... reinventing the wheel. ;) Thanks for the info Keith.

Dinu Gherman 13 years, 8 months ago  # | flag

More concise output and code. I find the following more concise (where find is available...).

def tree(dir, padding, print_files=False):
    cmd = "find '%s'" % dir
    files = os.popen(cmd).read().strip().split('\n')
    padding = '|  '
    for file in files:
        level = file.count(os.sep)
        pieces = file.split(os.sep)
        symbol = {0:'', 1:'/'}[isdir(file)]
        if not print_files and symbol != '/':
            continue
        print padding*level + pieces[-1] + symbol
Lance Miller 9 years, 1 month ago  # | flag

No success.

>./tree.py -help
: No such file or directory
>./tree.py
: No such file or directory
>./tree.py .
: No such file or directory
>./tree.py /Applications
: No such file or directory
>./tree.py `pwd`
: No such file or directory
>./tree.py pwd
: No such file or directory
>./tree.py ~/
: No such file or directory
>./tree.py -f `pwd`
: No such file or directory
>
David Soh 6 years, 10 months ago  # | flag

No Problem. May I ask A Question, How to filter hidden file(s) and directory(s)? (You can test with set the path to home directory in linux) (Sorry for my poor english, i'm chinese student in Malaysia.)

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