Algorithms implemented in Python

Related tags

Algorithms python-algorithms
Overview

Python Algorithms Library

Laurent Luce

Description

The purpose of this library is to help you with common algorithms like:

A* path finding.

String Matching

  • Naive.
  • Rabin-Karp.
  • Knuth-Morris-Pratt.
  • Boyer-Moore-Horspool.

String

  • Convert string to integer without using int on the full string.
  • Reverse string containing words.

Generators

  • Permutations.

Lists

  • Find integer using binary search.
  • Find subset with max sum.
  • Merge sort.
  • Quicksort.

Binary tree

Tests

$ ./pants test ::

License

The Python Algorithms Library is distributed under the MIT License

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Comments
  • Python3 A Star Test TypeError: '<' not supported between instances of 'Cell' and 'Cell'

    Python3 A Star Test TypeError: '<' not supported between instances of 'Cell' and 'Cell'

    Hello!Thanks for your A Star introduction! When I try to run your test_a_star_path_finding.py in python3.6,it gets this error:

    Traceback (most recent call last): File "g:/workspace_local/Project/forecast/Code/RL_NAV/astar/test_a_star_path_finding.py", line 25, in test_maze_no_walls path = a.solve() File "g:\workspace_local\Project\forecast\Code\RL_NAV\astar\a_star_path_finding.py", line 145, in solve heapq.heappush(self.opened,(adj_cell.f, adj_cell)) TypeError: '<' not supported between instances of 'Cell' and 'Cell'

    There may be something different between python3.6 and python2.7

    I'm trying to fix it . Hope you have time to have a look!

    Thank you!

    opened by HaxiSnake 6
  • Improve astar

    Improve astar

    • Fix TypeError: unorderable types: Cell() < Cell() error for python 3+
    • Path for test_maze was replaced to equivalent one
    • Improve a_start algorithms.
    • Add diagonal movement mode
    • Add mode for finding closest cell for unreachable end.
    • Add more convenient visual way for create tests.
    • Add new more tests.
    opened by doroginin 0
  • Enabled root deletion for zero and one child roots

    Enabled root deletion for zero and one child roots

    Before, if your tree was lopsided or only consisted of the single root node, deleting the node would do nothing. This fixes this so the root node is actually deleted (and replaced if need be). I added a test case to test_binary_tree.py.

    opened by imgemp 0
  • docs: fix simple typo, higest -> highest

    docs: fix simple typo, higest -> highest

    There is a small typo in algorithms/list.py.

    Should read highest rather than higest.

    Semi-automated pull request generated by https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md

    opened by timgates42 0
Owner
Laurent Luce
Laurent Luce
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