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How to recursively generate directory size in python, e.g. du. does?

Let's say my structure is like this

/-- am here
/one/some/dir
/two
/three/has/many/leaves
/hello/world

and say / one / some / dir contains a large file, 500mb and / three / has / many / leaves contains a 400mb file in each folder.

I want to create a size for each directory to have this output

/ - in total for all
/one/some/dir 500mb
/two 0 
/three/has/many/leaved - 400mb
/three/has/many 800
/three/has/ 800+someotherbigfilehere

How can i do this?

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4 answers

Take a look os.walk. In particular, the documentation has an example to find the size of a directory:

import os
from os.path import join, getsize
for root, dirs, files in os.walk('python/Lib/email'):
    print root, "consumes",
    print sum(getsize(join(root, name)) for name in files),
    print "bytes in", len(files), "non-directory files"
    if 'CVS' in dirs:
        dirs.remove('CVS')  # don't visit CVS directories

It should be easy enough to change for your purposes.

Here's an unverified version in response to your comment:

import os
from os.path import join, getsize
dirs_dict = {}

#We need to walk the tree from the bottom up so that a directory can have easy
# access to the size of its subdirectories.
for root, dirs, files in os.walk('python/Lib/email',topdown = False):

    # Loop through every non directory file in this directory and sum their sizes
    size = sum(getsize(join(root, name)) for name in files) 

    # Look at all of the subdirectories and add up their sizes from the `dirs_dict`
    subdir_size = sum(dirs_dict[join(root,d)] for d in dirs)

    # store the size of this directory (plus subdirectories) in a dict so we 
    # can access it later
    my_size = dirs_dict[root] = size + subdir_size

    print '%s: %d'%(root,my_size)
+8
source

script . script - Posix/Windows/etc. ( ) . , script . . .

PS 578019

from __future__ import print_function
import os
import sys
import operator

def null_decorator(ob):
    return ob

if sys.version_info >= (3,2,0):
    import functools
    my_cache_decorator = functools.lru_cache(maxsize=4096)
else:
    my_cache_decorator = null_decorator

start_dir = os.path.normpath(os.path.abspath(sys.argv[1])) if len(sys.argv) > 1 else '.'

@my_cache_decorator
def get_dir_size(start_path = '.'):
    total_size = 0
    if 'scandir' in dir(os):
        # using fast 'os.scandir' method (new in version 3.5)
        for entry in os.scandir(start_path):
            if entry.is_dir(follow_symlinks = False):
                total_size += get_dir_size(entry.path)
            elif entry.is_file(follow_symlinks = False):
                total_size += entry.stat().st_size
    else:
        # using slow, but compatible 'os.listdir' method
        for entry in os.listdir(start_path):
            full_path = os.path.abspath(os.path.join(start_path, entry))
            if os.path.islink(full_path):
                continue
            if os.path.isdir(full_path):
                total_size += get_dir_size(full_path)
            elif os.path.isfile(full_path):
                total_size += os.path.getsize(full_path)
    return total_size

def get_dir_size_walk(start_path = '.'):
    total_size = 0
    for dirpath, dirnames, filenames in os.walk(start_path):
        for f in filenames:
            fp = os.path.join(dirpath, f)
            total_size += os.path.getsize(fp)
    return total_size

def bytes2human(n, format='%(value).0f%(symbol)s', symbols='customary'):
    """
    (c) http://code.activestate.com/recipes/578019/

    Convert n bytes into a human readable string based on format.
    symbols can be either "customary", "customary_ext", "iec" or "iec_ext",
    see: https://en.wikipedia.org/wiki/Binary_prefix#Specific_units_of_IEC_60027-2_A.2_and_ISO.2FIEC_80000

      >>> bytes2human(0)
      '0.0 B'
      >>> bytes2human(0.9)
      '0.0 B'
      >>> bytes2human(1)
      '1.0 B'
      >>> bytes2human(1.9)
      '1.0 B'
      >>> bytes2human(1024)
      '1.0 K'
      >>> bytes2human(1048576)
      '1.0 M'
      >>> bytes2human(1099511627776127398123789121)
      '909.5 Y'

      >>> bytes2human(9856, symbols="customary")
      '9.6 K'
      >>> bytes2human(9856, symbols="customary_ext")
      '9.6 kilo'
      >>> bytes2human(9856, symbols="iec")
      '9.6 Ki'
      >>> bytes2human(9856, symbols="iec_ext")
      '9.6 kibi'

      >>> bytes2human(10000, "%(value).1f %(symbol)s/sec")
      '9.8 K/sec'

      >>> # precision can be adjusted by playing with %f operator
      >>> bytes2human(10000, format="%(value).5f %(symbol)s")
      '9.76562 K'
    """
    SYMBOLS = {
        'customary'     : ('B', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y'),
        'customary_ext' : ('byte', 'kilo', 'mega', 'giga', 'tera', 'peta', 'exa',
                           'zetta', 'iotta'),
        'iec'           : ('Bi', 'Ki', 'Mi', 'Gi', 'Ti', 'Pi', 'Ei', 'Zi', 'Yi'),
        'iec_ext'       : ('byte', 'kibi', 'mebi', 'gibi', 'tebi', 'pebi', 'exbi',
                           'zebi', 'yobi'),
    }
    n = int(n)
    if n < 0:
        raise ValueError("n < 0")
    symbols = SYMBOLS[symbols]
    prefix = {}
    for i, s in enumerate(symbols[1:]):
        prefix[s] = 1 << (i+1)*10
    for symbol in reversed(symbols[1:]):
        if n >= prefix[symbol]:
            value = float(n) / prefix[symbol]
            return format % locals()
    return format % dict(symbol=symbols[0], value=n)

############################################################
###
###  main ()
###
############################################################
if __name__ == '__main__':
    dir_tree = {}
    ### version, that uses 'slow' [os.walk method]
    #get_size = get_dir_size_walk
    ### this recursive version can benefit from caching the function calls (functools.lru_cache)
    get_size = get_dir_size

    for root, dirs, files in os.walk(start_dir):
        for d in dirs:
            dir_path = os.path.join(root, d)
            if os.path.isdir(dir_path):
                dir_tree[dir_path] = get_size(dir_path)

    for d, size in sorted(dir_tree.items(), key=operator.itemgetter(1), reverse=True):
        print('%s\t%s' %(bytes2human(size, format='%(value).2f%(symbol)s'), d))

    print('-' * 80)
    if sys.version_info >= (3,2,0):
        print(get_dir_size.cache_info())

:

37.61M  .\subdir_b
2.18M   .\subdir_a
2.17M   .\subdir_a\subdir_a_2
4.41K   .\subdir_a\subdir_a_1
----------------------------------------------------------
CacheInfo(hits=2, misses=4, maxsize=4096, currsize=4)
+1

@mgilson , . :

dirs_dict = {}
for root, dirs, files in os.walk(directory, topdown=False):
    if os.path.islink(root):
        dirs_dict[root] = 0L
    else:
        dir_size = getsize(root)

        # Loop through every non directory file in this directory and sum their sizes
        for name in files:
             full_name = join(root, name)
             if os.path.islink(full_name):
                 nsize = 0L
             else:
                 nsize = getsize(full_name)
             dirs_dict[full_name] = nsize
             dir_size += nsize

        # Look at all of the subdirectories and add up their sizes from the `dirs_dict`
        subdir_size = 0L
        for d in dirs:
            full_d = join(root, d)
            if os.path.islink(full_d):
                dirs_dict[full_d] = 0L
            else:
                subdir_size += dirs_dict[full_d]

        dirs_dict[root] = dir_size + subdir_size
0

:

def get_dir_size(path=os.getcwd()):

    total_size = 0
    for dirpath, dirnames, filenames in os.walk(path):

        dirsize = 0
        for f in filenames:
            fp = os.path.join(dirpath, f)
            size = os.path.getsize(fp)
            #print('\t',size, f)
            #print(dirpath, dirnames, filenames,size)
            dirsize += size
            total_size += size
        print('\t',dirsize, dirpath)
    print(" {0:.2f} Kb".format(total_size/1024))
0

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