Find the oldest (or yougest) of a list of files (Python)

2009-06-10T16:08:13-07:00

Python recipe 576804 by Micah Elliott (age, files, find, queue).

Sometimes you need to perform an operation on the oldest of a set of files. Using get_oldest_file you could implement an age-based priority queue that processes files from oldest to newest. The list of files you pass in may be from a glob of a single directory or some more elaborate search routine.

Find Multiple Elements In a List (Python)

2011-11-05T23:40:41-07:00

Python recipe 577943 by Alexander James Wallar (enumerate, find, list, search, search_list).

This algorithm searches for more than one element in a list. The input is a list that you want to search through and a list of elements that you want to search for. The output is a multidimensional list with the positions of the elements you are searching for in the search list in the order that you listed them.

Find file in subdirectory (Python)

2010-02-02T11:35:53-08:00

Python recipe 577027 by Daniel Cohn (file, find, subdirectory). Revision 2.

Walks subdirectories to find a file and returns . Default start location is the current working directory. Optionally, a different directory can be set as the search's starting location.

Python Multidimensional List Searcher (Python)

2011-10-29T22:21:39-07:00

Python recipe 577929 by Alexander James Wallar (element, elements, find, finder, list, python, search).

This module/function lets you find a 2 dimensional list of indices for elements you are looking for in a super list. Example:

find([1,1,1,2,1,2,3,3],[1,2,3])

returns: [[0, 1, 2, 4], [3, 5], [6, 7]]

Search sequences for sub-sequence (Python)

2011-08-19T05:17:00-07:00

Python recipe 577850 by Steven D'Aprano (find, searching, sequence, string, sublist, substring).

The list and tuple index() method and in operator test for element containment, unlike similar tests for strings, which checks for sub-strings:

>>> "12" in "0123"
True
>>> [1, 2] in [0, 1, 2, 3]
False

These two functions, search and rsearch, act like str.find() except they operate on any arbitrary sequence such as lists:

>>> search([1, "a", "b", 2, 3], ["b", 2])
2

get index of element in list using identity (Python)

2008-08-16T19:41:37-07:00

Python recipe 576426 by nosklo (compare, comparision, find, identity, index, is, same_object, search). Revision 2.

my_list.index(element) returns the index of the element using common comparision (as in == or __eq__() or __cmp__()). If you need to find an element on the list using identity comparing (is) then this function can do it for you

Build sqlite3 database like a locatedb (Python)

2009-11-19T17:20:52-08:00

Python recipe 576960 by Keisuke URAGO (file, find, locatedb). Revision 2.

This recipe is "updatedb" like command.

find + grep (Bash)

2013-09-17T08:48:07-07:00

Bash recipe 578661 by yota (find, grep, zsh). Revision 2.

look for a text pattern in files defined by a pattern. First argument is passed to the find command, second one to the grep

./find_n_grep.sh '*.py' 'dict'

more over, it sort by date.

Prints full name of all occurrences of given filename in your PATH (Python)

2009-06-29T15:20:10-07:00

Python recipe 576823 by Ben Hoyt (filename, find, path, which).

Simple program to print the full name of all occurrences of the given filename in your PATH. Kind of like the Unix "which" utility, but works for DLLs and other files as well.

Usage: findinpath.py filename

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