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--- task_boiler [2023/05/03 16:40] – [find depth of a file or directory] admin
+++ task_boiler [2024/01/23 22:55] (current) – raju
@@ Line 3: / Line 3: @@
 Start the first heading with "====="
-===== find depth =====
-==== find depth of a file or directory ====
-<code>
-import os
-def get_depth(file_or_dir_path):
-    abs_path = os.path.abspath(os.path.expanduser(file_or_dir_path))
-    depth = os.path.normpath(abs_path).count(os.sep)
-    return depth
-</code>
-Examples:
-<code>
-In [2]:
-os.path.abspath(os.path.expanduser('~'))
-Out[2]:
-'/home/rajulocal'
-In [3]:
-get_depth('~')
-Out[3]:
-In [4]:
-get_depth('/home/rajulocal')
-Out[4]:
-In [5]:
-get_depth('/home/rajulocal/')
-Out[5]:
-In [6]:
-get_depth('/home/rajulocal/foo')
-Out[6]:
-In [7]:
-get_depth('/')
-Out[7]:
-In [8]:
-get_depth('/home')
-Out[8]:
-</code>
-Using Python 3.10.6, Ipython 8.6.0
-tags | measure the depth of a file system path
-See also:
-  * https://stackoverflow.com/questions/31528199/how-to-measure-the-depth-of-a-file-system-path - shows how to do it with various command line tools.
-  * https://docs.python.org/3/library/os.path.html
-==== depth of a directory relative to a parent directory ====
-<code>
-import os
-def dir_depth_relative(child, parent):
-    child = os.path.abspath(os.path.expanduser(child))
-    parent = os.path.abspath(os.path.expanduser(parent))
-    assert child.startswith(parent), "child parent relation violated. parent = " + parent + ', child = ' + child
-    name_space = os.path.relpath(child, parent)
-    level = os.path.normpath(name_space).count(os.sep) + 1 if name_space != '.' else 0
-    return level
-</code>
-Examples:
-<code>
-In [2]:
-[dir_depth_relative('~', '~'), dir_depth_relative('~', '~/'),
- dir_depth_relative('~/work', '~'), dir_depth_relative('~/work.txt', '~'),
- dir_depth_relative('/tmp/foo', '/tmp'), dir_depth_relative('/tmp', '/tmp'),
- dir_depth_relative('/tmp/foo/bar', '/tmp')]
-Out[2]:
-[0, 0, 1, 1, 1, 0, 2]
-In [3]:
-dir_depth_relative('/tmp', '/tmp/foo')
----------------------------------------------------------------------------
-AssertionError                            Traceback (most recent call last)
-Cell In [3], line 1
-----> 1 dir_depth_relative('/tmp', '/tmp/foo')
-Cell In [1], line 6, in dir_depth_relative(child, parent)
-child = os.path.abspath(os.path.expanduser(child))
-parent = os.path.abspath(os.path.expanduser(parent))
-----> 6 assert child.startswith(parent), "child parent relation violated. parent = " + parent + ', child = ' + child
-name_space = os.path.relpath(child, parent)
-level = os.path.normpath(name_space).count(os.sep) + 1 if name_space != '.' else 0
-AssertionError: child parent relation violated. parent = /tmp/foo, child = /tmp
-</code>