python3获取文件及文件夹大小，,获取文件大小os.p

python3获取文件及文件夹大小，,获取文件大小os.p

获取文件大小

os.path.getsize(file_path)：file_path为文件路径

>>> import os>>> os.path.getsize(‘d:/svn/bin/SciLexer.dll‘)1479904

获取文件夹大小

遍历文件夹，将所有文件大小加和。遍历文件夹使用os.walk函数

import osfrom os.path import join, getsizedef getdirsize(dir):    size = 0    for root, dirs, files in os.walk(dir):        size += sum([getsize(join(root, name)) for name in files])    return sizeif __name__ == ‘__main__‘:    size = getdirsize(r‘D:\svn‘)    print(‘There are %.3f‘ % (size / 1024 / 1024), ‘Mbytes in D:\\svn‘)执行结果：

help(os.walk)获取帮助信息

Help on function walk in module os:walk(top, topdown=True, onerror=None, followlinks=False)    Directory tree generator.        For each directory in the directory tree rooted at top (including top    itself, but excluding ‘.‘ and ‘..‘), yields a 3-tuple            dirpath, dirnames, filenames        dirpath is a string, the path to the directory.  dirnames is a list of    the names of the subdirectories in dirpath (excluding ‘.‘ and ‘..‘).    filenames is a list of the names of the non-directory files in dirpath.    Note that the names in the lists are just names, with no path components.    To get a full path (which begins with top) to a file or directory in    dirpath, do os.path.join(dirpath, name).        If optional arg ‘topdown‘ is true or not specified, the triple for a    directory is generated before the triples for any of its subdirectories    (directories are generated top down).  If topdown is false, the triple    for a directory is generated after the triples for all of its    subdirectories (directories are generated bottom up).        When topdown is true, the caller can modify the dirnames list in-place    (e.g., via del or slice assignment), and walk will only recurse into the    subdirectories whose names remain in dirnames; this can be used to prune the    search, or to impose a specific order of visiting.  Modifying dirnames when    topdown is false is ineffective, since the directories in dirnames have    already been generated by the time dirnames itself is generated. No matter    the value of topdown, the list of subdirectories is retrieved before the    tuples for the directory and its subdirectories are generated.        By default errors from the os.scandir() call are ignored.  If    optional arg ‘onerror‘ is specified, it should be a function; it    will be called with one argument, an OSError instance.  It can    report the error to continue with the walk, or raise the exception    to abort the walk.  Note that the filename is available as the    filename attribute of the exception object.        By default, os.walk does not follow symbolic links to subdirectories on    systems that support them.  In order to get this functionality, set the    optional argument ‘followlinks‘ to true.        Caution:  if you pass a relative pathname for top, don‘t change the    current working directory between resumptions of walk.  walk never    changes the current directory, and assumes that the client doesn‘t    either.        Example:        import os    from os.path import join, getsize    for root, dirs, files in os.walk(‘python/Lib/email‘):        print(root, "consumes", end="")        print(sum([getsize(join(root, name)) for name in files]), end="")        print("bytes in", len(files), "non-directory files")        if ‘CVS‘ in dirs:            dirs.remove(‘CVS‘)  # don‘t visit CVS directories

python3获取文件及文件夹大小