Question

这是一个搜索大于指定大小的文件的脚本：

def size_scan(folder, size=100000000):
    """Scan folder for files bigger than specified size

    folder: abspath
    size: size in bytes
    """
    flag = False

    for folder, subfolders, files in os.walk(folder):
        # skip 'anaconda3' folder
        if 'anaconda3' in folder:
            continue

        for file in files: 
            file_path = os.path.join(folder, file)
            if os.path.getsize(file_path) > size:
                print(file_path, ':', os.path.getsize(file_path))
                flag = True

    if not flag:
        print('There is nothing, Cleric')

在Linux中扫描根文件夹时出现以下错误消息：

Traceback (most recent call last):

  File "<ipython-input-123-d2865b8a190c>", line 1, in <module>
    runfile('/home/ozramsay/Code/sizescan.py', wdir='/home/ozramsay/Code')

  File "/home/ozramsay/anaconda3/lib/python3.6/site-packages/spyder/utils/site/sitecustomize.py", line 880, in runfile
    execfile(filename, namespace)

  File "/home/ozramsay/anaconda3/lib/python3.6/site-packages/spyder/utils/site/sitecustomize.py", line 102, in execfile
    exec(compile(f.read(), filename, 'exec'), namespace)

  File "/home/ozramsay/Code/sizescan.py", line 32, in <module>
    size_scan('/')

  File "/home/ozramsay/Code/sizescan.py", line 25, in size_scan
    if os.path.getsize(file_path) > size:

  File "/home/ozramsay/anaconda3/lib/python3.6/genericpath.py", line 50, in getsize
    return os.stat(filename).st_size

FileNotFoundError: [Errno 2] No such file or directory: '/run/udev/link.dvdrw'

我猜这是因为Python解释器无法扫描自己，所以我试图从搜索中跳过'anaconda3'文件夹（在上面的代码中用#skip anaconda文件夹标记）。但是，错误消息保持不变。

有人可以解释一下吗？

（如果此处不允许此类问题，请告诉我，并且应该进行编辑。谢谢）

Answer 1

文件python正在尝试获取os.stat(filename).st_size的大小是一个断开的链接。断开的链接是已删除目标的链接。它就像一个互联网链接，提供404.要在脚本中修复此问题，请检查它是否是文件（首选），或使用try / catch（不是首选）。要检查文件是文件而不是链接损坏，请使用os.path.isfile(file_path)。您的代码应如下所示：

def size_scan(folder, size=100000000):
"""Scan folder for files bigger than specified size

folder: abspath
size: size in bytes
"""
flag = False

for folder, subfolders, files in os.walk(folder):
    # skip 'anaconda3' folder
    if 'anaconda3' in folder:
        continue

    for file in files: 
        file_path = os.path.join(folder, file)
        if os.path.isfile(file_path) and (os.path.getsize(file_path) > size):
            print(file_path, ':', os.path.getsize(file_path))
            flag = True

if not flag:
    print('There is nothing, Cleric')

因此，在获得大小之前，它会检查文件是否确实存在，并检查所有链接以确保它存在。 Related SO post

Errno 2在Python中使用os.walk时

1 个答案: