Merge branch 'master' of git://github.com/TheAlgorithms/Python

Author: qckzr

Diff for: .github/FUNDING.yml

@@ -0,0 +1,12 @@
+# These are supported funding model platforms
+
+github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: TheAlgorithms
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+custom: ['http://paypal.me/TheAlgorithms/1000', 'https://donorbox.org/thealgorithms']

Diff for: .lgtm.yml

@@ -1,26 +1,5 @@
 language: python
-cache: pip
-python:
-    - 2.7
-    - 3.6
-    #- nightly
-    #- pypy
-    #- pypy3
-matrix:
-    allow_failures:
-        - python: nightly
-        - python: pypy
-        - python: pypy3
-install:
-    #- pip install -r requirements.txt
-    - pip install flake8  # pytest  # add another testing frameworks later
-before_script:
-    # stop the build if there are Python syntax errors or undefined names
-    - flake8 . --count --select=E9,F63,F72,F82 --show-source --statistics
-    # exit-zero treats all errors as warnings.  The GitHub editor is 127 chars wide
-    - flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-script:
-    - true  # pytest --capture=sys  # add other tests here
-notifications:
-    on_success: change
-    on_failure: change  # `always` will be the setting once code changes slow down
+dist: xenial  # required for Python >= 3.7
+python: 3.7
+install: pip install flake8
+script: flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics

Diff for: .travis.yml

@@ -72,9 +72,9 @@ We want your work to be readable by others; therefore, we encourage you to note
 
 - Write tests to illustrate your work.
 
-  The following "testing" approaches are not encouraged:
+  The following "testing" approaches are **not** encouraged:
 
-  ```python
+  ```python*
   input('Enter your input:') 
   # Or even worse...
   input = eval(raw_input("Enter your input: "))
@@ -97,20 +97,18 @@ We want your work to be readable by others; therefore, we encourage you to note
 
 #### Other Standard While Submitting Your Work
 
-- File extension for code should be `.py`.
-
-- Please file your work to let others use it in the future. Here are the examples that are acceptable:
+- File extension for code should be `.py`. Jupiter notebook files are acceptable in machine learning algorithms.
 
-  - Camel cases
-  - `-` Hyphenated names
-  - `_` Underscore-separated names
+- Strictly use snake case (underscore separated) in your file name, as it will be easy to parse in future using scripts.
 
   If possible, follow the standard *within* the folder you are submitting to.
 
 - If you have modified/added code work, make sure the code compiles before submitting.
 
 - If you have modified/added documentation work, make sure your language is concise and contains no grammar mistake.
 
+- Update the README file if you have added any new algorithm. Only entry corresponding to the algorithm is to be made, not need to add sample data, test files or solutions to problems like Project Euler, in the README.
+
 - Add a corresponding explanation to [Algorithms-Explanation](https://github.com/TheAlgorithms/Algorithms-Explanation) (Optional but recommended).
 
 - Most importantly,

Diff for: CONTRIBUTING.md

@@ -1,6 +1,3 @@
-## Analysis
-  * Compression Analysis
-    * [psnr](https://github.com/TheAlgorithms/Python/blob/master/analysis/compression_analysis/psnr.py)
 ## Arithmetic Analysis
   * [bisection](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/bisection.py)
   * [intersection](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/intersection.py)
@@ -39,17 +36,19 @@
   * [xor cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/xor_cipher.py)
 ## Compression
   * [huffman](https://github.com/TheAlgorithms/Python/blob/master/compression/huffman.py)
+## Compression Analysis
+  * [psnr](https://github.com/TheAlgorithms/Python/blob/master/compression_analysis/psnr.py)
 ## Data Structures
   * [arrays](https://github.com/TheAlgorithms/Python/blob/master/data_structures/arrays.py)
   * [avl](https://github.com/TheAlgorithms/Python/blob/master/data_structures/avl.py)
   * [LCA](https://github.com/TheAlgorithms/Python/blob/master/data_structures/LCA.py)
   * Binary Tree
-    * [AVL tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary%20tree/AVL_tree.py)
-    * [binary search tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary%20tree/binary_search_tree.py)
-    * [fenwick tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary%20tree/fenwick_tree.py)
-    * [lazy segment tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary%20tree/lazy_segment_tree.py)
-    * [segment tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary%20tree/segment_tree.py)
-    * [treap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary%20tree/treap.py)
+    * [AVL tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/AVL_tree.py)
+    * [binary search tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/binary_search_tree.py)
+    * [fenwick tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/fenwick_tree.py)
+    * [lazy segment tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/lazy_segment_tree.py)
+    * [segment tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/segment_tree.py)
+    * [treap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/treap.py)
   * Hashing
     * [double hash](https://github.com/TheAlgorithms/Python/blob/master/data_structures/hashing/double_hash.py)
     * [hash table](https://github.com/TheAlgorithms/Python/blob/master/data_structures/hashing/hash_table.py)
@@ -192,8 +191,9 @@
   * Tests
     * [test fibonacci](https://github.com/TheAlgorithms/Python/blob/master/maths/tests/test_fibonacci.py)
 ## Matrix
-  * [matrix multiplication addition](https://github.com/TheAlgorithms/Python/blob/master/matrix/matrix_multiplication_addition.py)
+  * [matrix operation](https://github.com/TheAlgorithms/Python/blob/master/matrix/matrix_operation.py)
   * [searching in sorted matrix](https://github.com/TheAlgorithms/Python/blob/master/matrix/searching_in_sorted_matrix.py)
+  * [spiralPrint](https://github.com/TheAlgorithms/Python/blob/master/matrix/spiralPrint.py)
 ## Networking Flow
   * [ford fulkerson](https://github.com/TheAlgorithms/Python/blob/master/networking_flow/ford_fulkerson.py)
   * [minimum cut](https://github.com/TheAlgorithms/Python/blob/master/networking_flow/minimum_cut.py)
@@ -294,6 +294,8 @@
     * [p022 names](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_22/p022_names.txt)
     * [sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_22/sol1.py)
     * [sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_22/sol2.py)
+  * Problem 234
+    * [sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_234/sol1.py)
   * Problem 24
     * [sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_24/sol1.py)
   * Problem 25