* Added new file: nasa_data.py

* Modified as per review

* Minor change

* print(get_archive_data("apollo 2011")["collection"]["items"][0]["data"][0]["description"])

* Update nasa_data.py
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* add check_cycle.py

* Update graphs/check_cycle.py
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* Update check_cycle.py

* Apply suggestions from code review
Co-authored-by: NJohn Law <johnlaw.po@gmail.com>
Co-authored-by: NChristian Clauss <cclauss@me.com>

* [mypy] Add/fix type annotations for linked queue in data_structures

* add return type annotation to __iter__

* Add more readable syntax

* Fix type annotations for trie.py

* Add strict type annotations to trie.py

Annotate return type for all functions and type for "nodes"

* updating DIRECTORY.md

* Format trie.py
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* added doctests to prime_check function

* fix doctests function name

* Update baconian_cipher.py

* Update join.py

* Updated type hint

Made the description more formal, also fixed a few grammatical issues.

* fix: fix mypy errors

Update binary_search_tree `arr` argument to be typed as a list
within `find_kth_smallest` function

Update return type of `merge_two_binary_trees` as both inputs can
be None which means that a None type value can be returned from
this function

* updating DIRECTORY.md
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* split into usable functions and added docstrings

* Simplified code
Co-authored-by: NChristian Clauss <cclauss@me.com>

* Simplified code
Co-authored-by: NChristian Clauss <cclauss@me.com>
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* [mypy] fix type annotations for graphs/a_star.py #4052

* updating DIRECTORY.md

* Add from __future__ import anotations

* rename delta by DIRECTIONS
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* Rename delta by DIRECTIONS in all code

* Enclose script in __main__ code block

* Refactor DIRECTIONS with comments for readibility

* Delete heuristic example comment

* Do not print, return all values

* Fix multilines

* fix black

* Update a_star.py
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* Add missing type annotation

* Fix conversion bug

This failed when called with the documented example of `1.5` and was correctly
pointed out by `mypy --strict`

The list comprehension shortcut was implicitly expecting a return
value causing a mypy error since `insert_tail` doesn't return a value

* Update annotations to Python 3.10 #4052

* Add floats doctest

* Copy list to avoid changing input unpredictably

* Refactor code to make it readable

* updating DIRECTORY.md

* Improve raised ValueErrors and add doctest

* Split doctest in multiples lines

* Change ValueError to Monogons and Digons are not poly

* Correct doctest refering number of sides
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* updating DIRECTORY.md

* pass integer to `math.factorial` in `project_euler/problem_015`

* remove duplicated factorial function

* updating DIRECTORY.md

* Update maths/factorial_iterative.py
Co-authored-by: NChristian Clauss <cclauss@me.com>

* Update factorial_iterative.py
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* Add deque_from_scratch.py

* added deque_from_scratch.py

* add extend, extendleft and make comparison

* updated operations list

* fix doctest on Deque.__iter__

* pre-commit fix

* time complexity comments, change type hints

* pre-commit fix

* added more doctests

Change how many "=" sign to how many "=" signs

* Fix several typos

* Update bit_manipulation/README.md
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* Update double_sort.py
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* Added regular expression implimentation using dp

* replaced input() with example values

* Apply suggestions from code review
Co-authored-by: NChristian Clauss <cclauss@me.com>

* changed returning value to bool and added test cases

* added doctest
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* added test cases

* Apply suggestions from code review
Co-authored-by: NJohn Law <johnlaw.po@gmail.com>

* shifted to strings

* Changed filename

* Update function name to match_pattern
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* Update function name to match_pattern
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Co-authored-by: NChristian Clauss <cclauss@me.com>
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This is a followup to https://github.com/TheAlgorithms/Python/pull/4973#issuecomment-933117382

As per given suggestion, I've added type hints to certain methods that don't have them.  I have also added documentation and example doctests as a usage example for (most of) those that don't have them.

I have also added another test case following the previous test case's format. I noticed that the existing test case from previous pull request might be redundant with the ones I've made, so I decided to create a specific situation where the linked list would have to keep different kinds of data types for each node, in `test_singly_linked_list_2` test function.

Some minor changes in strings has been done to keep things consistent with other parts of the document. If it is undesirable, please let me know.

* Added check_strong_password.py

* Corrected Comment

* Updated

* Updated check_strong_password.py

* Ran Pre-Commit

Changed it's (it is) to its

* length_conversion.py: Deal with uppercase and abbreviations

* updating DIRECTORY.md
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* Add polybius cipher

* Fix polybius.py build issues and add test

* Remove exception detail from doctest

These details are configuration dependant so should be removed according to https://docs.python.org/3/library/doctest.html

* updating DIRECTORY.md
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* Added length unit conversions

Conversion of length units were added with respective tests being implemented and passed.
Available Units:- Metre,Kilometre,Feet,Inch,Centimeter,Yard,Foot,Mile,Millimeter

* Formatted File

File was formatted to go as per repo rules

* Reformatted file

* Reformatted code once again

* Added more test 

Added test to evaluate whether the code handles wrong arguements passed

* Update length_conversions.py

* Update length_conversions.py

* Update length_conversions.py

* Update length_conversions.py

* Update length_conversions.py

* Update length_conversions.py

* Update length_conversions.py

* Fixed  Minor errors in test

One of the test was failing and it was fixed
Co-authored-by: NChristian Clauss <cclauss@me.com>

Ref - http://graphics.stanford.edu/~seander/bithacks.html#CountBitsSetKernighan

* added schur complement and tests to linear algebra

* updated according to checklist

* updated variable names and typing

* added two testcases for input validation

* fixed import order
Co-authored-by: NIvan Radonov <ivan.radonov@ad.mentormate.bg>

* Create join.py

Because we have a split.py

* Update join.py

* Update join.py

* Update join.py

* Update join.py

* Update join.py

* Update strings/join.py
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* Update join.py

* Update join.py

* Update join.py

* Update join.py
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* Added giphy.py to fetch gifs on a given topic

* Modified code
[*]Added doctest
[*]Formatted with black

* Minor change

* Minor refactoring to avoid name clash

* Made necessary changes as per review

* Update web_programming/giphy.py
Co-authored-by: NChristian Clauss <cclauss@me.com>

* Apply suggestions from code review

* Final cleanup

* Placate psf/black
Co-authored-by: NChristian Clauss <cclauss@me.com>

* added harmonic mean

* Update maths/series/harmonic_mean.py

Updated the write-up of reference given in the code.
Co-authored-by: NJohn Law <johnlaw.po@gmail.com>

* changes in arithmetic and geometric mean code

* mean and series added in a single file
Co-authored-by: NJohn Law <johnlaw.po@gmail.com>

* fix: type annotations for pypi 🏷️

Fixes #4052

* updating DIRECTORY.md

* apply suggestions from code review
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* fix mypy error

* updating DIRECTORY.md

* simplify code

* run black

* fix doc consistency

* Fix doc

* fix doc
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* adde solution to problem 092

* added solution to problem 092

* fixed the pre-comit shebang issue

* Add tests to morse_code.py

@dhruvmanila @poyea Your reviews, please.

* updating DIRECTORY.md
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* Added morphological operations, fixes: #5197

* Added dilation tests and type hints

* Added erosion tests and type hints

* fixes: TheAlgorithms#5197

* fixes: TheAlgorithms#5197

* Update erosion_operation.py

* made suggested changes in dilation

* made suggested changes in erosion

* made suggested changes in dilation

* removed extra spaces in the tests

* removed extra spaces in the tests