python3 获取文件文件夹大小

不念不忘少年蓝@ 2021-08-24 21:25 563阅读 0赞

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 os
    from os.path import join, getsize
    
    
    def getdirsize(dir):
        size = 0
        for root, dirs, files in os.walk(dir):
            size += sum([getsize(join(root, name)) for name in files])
        return size
    
    
    if __name__ == '__main__':
        size = getdirsize(r'D:\svn')
        print('There are %.3f' % (size / 1024 / 1024), 'Mbytes in D:\\svn')\

执行结果：

![format_png][]

help(os.walk)获取帮助信息

> Help on function walk in module os:
> 
> walk(top, topdown=True, οnerrοr=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
> 
>

[format_png]: /images/20210728/e4ca20cf4d8f4cc6b0007178798064fc.png