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Rohit Tanwar
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README.md
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README.md
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# 30-seconds-of-python-code [](http://www.twitter.com/share?text=%2330secondsofcode+30-seconds-of-python-code+-+Python+Implementation+of+30+seconds+of+code%0Ahttps://github.com/kriadmin/30-seconds-of-python-code&url=a")
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# 30-seconds-of-python-code [](http://www.twitter.com/share?text=%2330secondsofcode+30-seconds-of-python-code+-+Python+Implementation+of+30+seconds+of+code%0Ahttps://github.com/kriadmin/30-seconds-of-python-code&url=a")
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[](https://github.com/kriadmin/30-seconds-of-python-code/blob/master/LICENSE)
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[](http://www.firsttimersonly.com/) [](https://gitter.im/30-seconds-of-python-code/Lobby) [](http://makeapullrequest.com) [](https://travis-ci.org/kriadmin/30-seconds-of-python-code) [](https://insight.io/github.com/kriadmin/30-seconds-of-python-code/tree/master/?source=0) [](https://github.com/Flet/semistandard)
|
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[](http://www.firsttimersonly.com/) [](https://gitter.im/30-seconds-of-python-code/Lobby) [](http://makeapullrequest.com) [](https://travis-ci.org/kriadmin/30-seconds-of-python-code) [](https://insight.io/github.com/kriadmin/30-seconds-of-python-code/tree/master/?source=0) [](https://github.com/Flet/semistandard)
|
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[](https://app.fossa.io/projects/git%2Bgithub.com%2Fkriadmin%2F30-seconds-of-python-code?ref=badge_shield)
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>Python implementation of 30-seconds-of-code.
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## Welcome to 30-seconds-of-🐍-code!
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>A Python implementation of 30-seconds-of-code.
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**Note**:- This is in no way affiliated with the original [30-seconds-of-code](https://github.com/Chalarangelo/30-seconds-of-code/).
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If you've come here from javascript land then you should be aware that this project uses `python 3`, therefore not all snippets will work as expected in every python interpreter or on system. You'll need to check your python version with the command `python -v`. If you need help installing the latest stable release of python 3 on your system checkout docs.python.org if you run into trouble make sure you research stackoverflow. Eventually it might be worth looking into how to set up a virtual environment for python projects with virtualenv or even a tool like anaconda.
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This project contains plenty of useful snippets which can help beginners and newcomers quickly ramp-up on grasping python 3's syntax.
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### Table of contents
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### :books: List
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@ -20,6 +26,7 @@
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<li><a href = "#deep_flatten"><code>deep_flatten</code></a></li>
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<li><a href = "#difference"><code>difference</code></a></li>
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<li><a href = "#difference_by"><code>difference_by</code></a></li>
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<li><a href = "#has_duplicates"><code>has_duplicates</code></a></li>
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<li><a href = "#insertion_sort"><code>insertion_sort</code></a></li>
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<li><a href = "#shuffle"><code>shuffle</code></a></li>
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<li><a href = "#spread"><code>spread</code></a></li>
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@ -36,6 +43,13 @@
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<li><a href = "#min_n"><code>min_n</code></a></li>
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</ul></details>
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### card_file_box Object
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<details><summary>View contents</summary> <ul><li><a href = "#all_unique"><code>all_unique</code></a></li>
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<li><a href = "#keys_only"><code>keys_only</code></a></li>
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<li><a href = "#values_only"><code>values_only</code></a></li>
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</ul></details>
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### :scroll: String
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<details><summary>View contents</summary> <ul><li><a href = "#byte_size"><code>byte_size</code></a></li>
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@ -256,6 +270,30 @@ difference_by([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], lambda v : v['x']) # [ { x
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<br><a href = "#table-of-contents">:arrow_up: Back to top</a>
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### has_duplicates
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<span style="color:grey">Author:-</span> [Rob-Rychs](@Rob-Rychs)
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<span style="color:grey">Contributors:-</span> [Rob-Rychs](@Rob-Rychs)
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Checks a flat list for duplicate values. Returns True if duplicate values exist and False if values are all unique.
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This function compares the length of the list with length of the set() of the list. set() removes duplicate values from the list.
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```py
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def has_duplicates(lst):
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return len(lst) != len(set(lst))
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```
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<details><summary>View Examples</summary>
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```py
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x = [1,2,3,4,5,5]
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y = [1,2,3,4,5]
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has_duplicates(x) # True
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has_duplicates(y) # False
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```
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</details>
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<br><a href = "#table-of-contents">:arrow_up: Back to top</a>
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### insertion_sort
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<span style="color:grey">Author:-</span> [Meet Zaveri](https://www.github.com/meetzaveri)
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@ -385,7 +423,7 @@ zip(['a'], [1, 2], [True, False], fill_value = '_') # [['a', 1, True], ['_', 2,
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Returns the average of two or more numbers.
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Takes the sum of all the `args` and divides it by `len(args)`. The second argument `0.0` in sum is to handle floating point division in `python2`.
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Takes the sum of all the `args` and divides it by `len(args)`. The second argument `0.0` in sum is to handle floating point division in `python3`.
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```py
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def average(*args):
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return sum(args, 0.0) / len(args)
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@ -563,6 +601,90 @@ min_n([1, 2, 3], 2) # [1,2]
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<br><a href = "#table-of-contents">:arrow_up: Back to top</a>
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## card_file_box Object
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### all_unique
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<span style="color:grey">Author:-</span> [Rob-Rychs](@Rob-Rychs)
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<span style="color:grey">Contributors:-</span> [Rob-Rychs](@Rob-Rychs)
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Checks a flat list for all unique values. Returns True if list values are all unique and False if list values aren't all unique.
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This function compares the length of the list with length of the set() of the list. set() removes duplicate values from the list.
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```py
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def all_unique(lst):
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return len(lst) == len(set(lst))
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```
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<details><summary>View Examples</summary>
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```py
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x = [1,2,3,4,5,6]
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y = [1,2,2,3,4,5]
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all_unique(x) # True
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all_unique(y) # False
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```
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</details>
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<br><a href = "#table-of-contents">:arrow_up: Back to top</a>
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### keys_only
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<span style="color:grey">Author:-</span> [Rob-Rychs](@Rob-Rychs)
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<span style="color:grey">Contributors:-</span> [Rob-Rychs](@Rob-Rychs)
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Function which accepts a dictionary of key value pairs and returns a new flat list of only the keys.
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Uses the .items() function with a for loop on the dictionary to track both the key and value and returns a new list by appending the keys to it. Best used on 1 level-deep key:value pair dictionaries (a flat dictionary) and not nested data-structures which are also commonly used with dictionaries. (a flat dictionary resembles a json and a flat list an array for javascript people).
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```py
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def keys_only(flat_dict):
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lst = []
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for k, v in flat_dict.items():
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lst.append(k)
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return lst
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```
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<details><summary>View Examples</summary>
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```py
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ages = {
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"Peter": 10,
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"Isabel": 11,
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"Anna": 9,
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}
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keys_only(ages) # ['Peter', 'Isabel', 'Anna']
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```
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</details>
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<br><a href = "#table-of-contents">:arrow_up: Back to top</a>
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|
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### values_only
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||||
<span style="color:grey">Author:-</span> [Rob-Rychs](@Rob-Rychs)
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||||
|
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<span style="color:grey">Contributors:-</span> [Rob-Rychs](@Rob-Rychs)
|
||||
|
||||
Function which accepts a dictionary of key value pairs and returns a new flat list of only the values.
|
||||
|
||||
Uses the .items() function with a for loop on the dictionary to track both the key and value of the iteration and returns a new list by appending the values to it. Best used on 1 level-deep key:value pair dictionaries and not nested data-structures.
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```py
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def values_only(dict):
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lst = []
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for k, v in dict.items():
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lst.append(v)
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return lst
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```
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<details><summary>View Examples</summary>
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||||
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```py
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ages = {
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"Peter": 10,
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"Isabel": 11,
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"Anna": 9,
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}
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values_only(ages) # [10, 11, 9]
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```
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</details>
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<br><a href = "#table-of-contents">:arrow_up: Back to top</a>
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## :scroll: String
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### byte_size
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@ -1,5 +1,5 @@
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def keys_only(dict):
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def keys_only(flat_dict):
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lst = []
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for k, v in dict.items():
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for k, v in flat_dict.items():
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lst.append(k)
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return lst
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@ -1,8 +1,3 @@
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count_vowels
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byte_size
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capitalize
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capitalize_every_word
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decapitalize
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palindrome
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is_upper_case
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is_lower_case
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keys_only
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values_only
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all_unique
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@ -1,9 +1,9 @@
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{% extends "base.html" %}
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{% block content %}<div class="row" style="height:calc(100vh - 5.875rem);overflow:hidden"><input id="doc-drawer-checkbox" class="drawer" value="on" type="checkbox"><nav class="col-md-4 col-lg-3" style="border-top:0"><div class="group"><input class="search" id="searchInput" onkeyup="search(this)" type="text"><label id="search-label">Search for snippet...</label></div><label for="doc-drawer-checkbox" class="button drawer-close"></label><h3 style = "">Math</h3><a class="sublink-1" tags="math" href="#average" style="">average</a><a class="sublink-1" tags="math" href="#factorial" style="">factorial</a><a class="sublink-1" tags="math" href="#gcd" style="">gcd</a><a class="sublink-1" tags="math" href="#lcm" style="">lcm</a><a class="sublink-1" tags="math" href="#max_n" style="">max_n</a><a class="sublink-1" tags="math" href="#min_n" style="">min_n</a><h3 style = "">List</h3><a class="sublink-1" tags="list" href="#chunk" style="">chunk</a><a class="sublink-1" tags="list" href="#compact" style="">compact</a><a class="sublink-1" tags="list" href="#count_occurences" style="">count_occurences</a><a class="sublink-1" tags="list" href="#deep_flatten" style="">deep_flatten</a><a class="sublink-1" tags="list" href="#difference" style="">difference</a><a class="sublink-1" tags="list" href="#shuffle" style="">shuffle</a><a class="sublink-1" tags="list" href="#spread" style="">spread</a><a class="sublink-1" tags="list" href="#zip" style="">zip</a><a class="sublink-1" tags="list" href="#count_by" style="">count_by</a><a class="sublink-1" tags="list" href="#difference_by" style="">difference_by</a><a class="sublink-1" tags="list" href="#insertion_sort" style="">insertion_sort</a><a class="sublink-1" tags="list" href="#bubble_sort" style="">bubble_sort</a><h3 style = "">String</h3><a class="sublink-1" tags="string" href="#count_vowels" style="">count_vowels</a><a class="sublink-1" tags="string" href="#byte_size" style="">byte_size</a><a class="sublink-1" tags="string" href="#capitalize" style="">capitalize</a><a class="sublink-1" tags="string" href="#capitalize_every_word" style="">capitalize_every_word</a><a class="sublink-1" tags="string" href="#decapitalize" style="">decapitalize</a><a class="sublink-1" tags="string" href="#palindrome" style="">palindrome</a><a class="sublink-1" tags="string" href="#is_upper_case" style="">is_upper_case</a><a class="sublink-1" tags="string" href="#is_lower_case" style="">is_lower_case</a></nav><main class="col-sm-12 col-md-8 col-lg-9" style="height:100%;overflow-y:auto;background:#eceef2;padding:0"><a id="top"></a><h2 style="text-align:center">Math</h2><div class="card fluid"><h3 id="average" class="section double-padded">average</h3><!--<form action="" method="post"><button type="submit" value="average" name="submit">Vote</button></form><p></p>--><div class="section double-padded">
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{% block content %}<div class="row" style="height:calc(100vh - 5.875rem);overflow:hidden"><input id="doc-drawer-checkbox" class="drawer" value="on" type="checkbox"><nav class="col-md-4 col-lg-3" style="border-top:0"><div class="group"><input class="search" id="searchInput" onkeyup="search(this)" type="text"><label id="search-label">Search for snippet...</label></div><label for="doc-drawer-checkbox" class="button drawer-close"></label><h3 style = "">Math</h3><a class="sublink-1" tags="math" href="#average" style="">average</a><a class="sublink-1" tags="math" href="#factorial" style="">factorial</a><a class="sublink-1" tags="math" href="#gcd" style="">gcd</a><a class="sublink-1" tags="math" href="#lcm" style="">lcm</a><a class="sublink-1" tags="math" href="#max_n" style="">max_n</a><a class="sublink-1" tags="math" href="#min_n" style="">min_n</a><h3 style = "">List</h3><a class="sublink-1" tags="list" href="#chunk" style="">chunk</a><a class="sublink-1" tags="list" href="#compact" style="">compact</a><a class="sublink-1" tags="list" href="#count_occurences" style="">count_occurences</a><a class="sublink-1" tags="list" href="#deep_flatten" style="">deep_flatten</a><a class="sublink-1" tags="list" href="#difference" style="">difference</a><a class="sublink-1" tags="list" href="#shuffle" style="">shuffle</a><a class="sublink-1" tags="list" href="#spread" style="">spread</a><a class="sublink-1" tags="list" href="#zip" style="">zip</a><a class="sublink-1" tags="list" href="#count_by" style="">count_by</a><a class="sublink-1" tags="list" href="#difference_by" style="">difference_by</a><a class="sublink-1" tags="list" href="#insertion_sort" style="">insertion_sort</a><a class="sublink-1" tags="list" href="#bubble_sort" style="">bubble_sort</a><a class="sublink-1" tags="list" href="#has_duplicates" style="">has_duplicates</a><h3 style = "">String</h3><a class="sublink-1" tags="string" href="#count_vowels" style="">count_vowels</a><a class="sublink-1" tags="string" href="#byte_size" style="">byte_size</a><a class="sublink-1" tags="string" href="#capitalize" style="">capitalize</a><a class="sublink-1" tags="string" href="#capitalize_every_word" style="">capitalize_every_word</a><a class="sublink-1" tags="string" href="#decapitalize" style="">decapitalize</a><a class="sublink-1" tags="string" href="#palindrome" style="">palindrome</a><a class="sublink-1" tags="string" href="#is_upper_case" style="">is_upper_case</a><a class="sublink-1" tags="string" href="#is_lower_case" style="">is_lower_case</a><h3 style = "">Object</h3><a class="sublink-1" tags="object" href="#keys_only" style="">keys_only</a><a class="sublink-1" tags="object" href="#values_only" style="">values_only</a><a class="sublink-1" tags="object" href="#all_unique" style="">all_unique</a></nav><main class="col-sm-12 col-md-8 col-lg-9" style="height:100%;overflow-y:auto;background:#eceef2;padding:0"><a id="top"></a><h2 style="text-align:center">Math</h2><div class="card fluid"><h3 id="average" class="section double-padded">average</h3><!--<form action="" method="post"><button type="submit" value="average" name="submit">Vote</button></form><p></p>--><div class="section double-padded">
|
||||
<p><emoji>ℹ</emoji> Already implemented via <code>statistics.mean</code>. <code>statistics.mean</code> takes an array as an argument whereas this function takes variadic arguments.</p>
|
||||
<p>Returns the average of two or more numbers.</p>
|
||||
<p>Takes the sum of all the <code>args</code> and divides it by <code>len(args)</code>. The second argument <code>0.0</code> in sum is to handle floating point division in <code>python2</code>.</p>
|
||||
<p>Takes the sum of all the <code>args</code> and divides it by <code>len(args)</code>. The second argument <code>0.0</code> in sum is to handle floating point division in <code>python3</code>.</p>
|
||||
|
||||
<pre class="language-python">def average(*args):
|
||||
return sum(args, 0.0) / len(args)</pre>
|
||||
@ -306,6 +306,19 @@ bubble_sort(lst)
|
||||
print("sorted %s" %lst) # [17,20,26,31,44,54,55,77,91]</pre>
|
||||
<button class="primary clipboard-copy">📋 Copy to clipboard</button></div>
|
||||
|
||||
</div><div class="card fluid"><h3 id="has_duplicates" class="section double-padded">has_duplicates</h3><!--<form action="" method="post"><button type="submit" value="has_duplicates" name="submit">Vote</button></form><p></p>--><div class="section double-padded">
|
||||
<p>Checks a flat list for duplicate values. Returns True if duplicate values exist and False if values are all unique.</p>
|
||||
<p>This function compares the length of the list with length of the set() of the list. set() removes duplicate values from the list.</p>
|
||||
|
||||
<pre class="language-python">def has_duplicates(lst):
|
||||
return len(lst) != len(set(lst))</pre>
|
||||
<label class="collapse">Show examples</label>
|
||||
<pre class="language-python">x = [1,2,3,4,5,5]
|
||||
y = [1,2,3,4,5]
|
||||
has_duplicates(x) # True
|
||||
has_duplicates(y) # False</pre>
|
||||
<button class="primary clipboard-copy">📋 Copy to clipboard</button></div>
|
||||
|
||||
</div><h2 style="text-align:center">String</h2><div class="card fluid"><h3 id="count_vowels" class="section double-padded">count_vowels</h3><!--<form action="" method="post"><button type="submit" value="count_vowels" name="submit">Vote</button></form><p></p>--><div class="section double-padded">
|
||||
<p>Retuns <code>number</code> of vowels in provided <code>string</code>.</p>
|
||||
<p>Use a regular expression to count the number of vowels <code>(A, E, I, O, U)</code> in a string.</p>
|
||||
@ -399,6 +412,55 @@ is_lower_case('a3@$') # True
|
||||
is_lower_case('Ab4') # False</pre>
|
||||
<button class="primary clipboard-copy">📋 Copy to clipboard</button></div>
|
||||
|
||||
</div><h2 style="text-align:center">Object</h2><div class="card fluid"><h3 id="keys_only" class="section double-padded">keys_only</h3><!--<form action="" method="post"><button type="submit" value="keys_only" name="submit">Vote</button></form><p></p>--><div class="section double-padded">
|
||||
<p>Function which accepts a dictionary of key value pairs and returns a new flat list of only the keys.</p>
|
||||
<p>Uses the .items() function with a for loop on the dictionary to track both the key and value and returns a new list by appending the keys to it. Best used on 1 level-deep key:value pair dictionaries (a flat dictionary) and not nested data-structures which are also commonly used with dictionaries. (a flat dictionary resembles a json and a flat list an array for javascript people).</p>
|
||||
|
||||
<pre class="language-python">def keys_only(flat_dict):
|
||||
lst = []
|
||||
for k, v in flat_dict.items():
|
||||
lst.append(k)
|
||||
return lst</pre>
|
||||
<label class="collapse">Show examples</label>
|
||||
<pre class="language-python">ages = {
|
||||
"Peter": 10,
|
||||
"Isabel": 11,
|
||||
"Anna": 9,
|
||||
}
|
||||
keys_only(ages) # ['Peter', 'Isabel', 'Anna']</pre>
|
||||
<button class="primary clipboard-copy">📋 Copy to clipboard</button></div>
|
||||
|
||||
</div><div class="card fluid"><h3 id="values_only" class="section double-padded">values_only</h3><!--<form action="" method="post"><button type="submit" value="values_only" name="submit">Vote</button></form><p></p>--><div class="section double-padded">
|
||||
<p>Function which accepts a dictionary of key value pairs and returns a new flat list of only the values.</p>
|
||||
<p>Uses the .items() function with a for loop on the dictionary to track both the key and value of the iteration and returns a new list by appending the values to it. Best used on 1 level-deep key:value pair dictionaries and not nested data-structures.</p>
|
||||
|
||||
<pre class="language-python">def values_only(dict):
|
||||
lst = []
|
||||
for k, v in dict.items():
|
||||
lst.append(v)
|
||||
return lst</pre>
|
||||
<label class="collapse">Show examples</label>
|
||||
<pre class="language-python">ages = {
|
||||
"Peter": 10,
|
||||
"Isabel": 11,
|
||||
"Anna": 9,
|
||||
}
|
||||
values_only(ages) # [10, 11, 9]</pre>
|
||||
<button class="primary clipboard-copy">📋 Copy to clipboard</button></div>
|
||||
|
||||
</div><div class="card fluid"><h3 id="all_unique" class="section double-padded">all_unique</h3><!--<form action="" method="post"><button type="submit" value="all_unique" name="submit">Vote</button></form><p></p>--><div class="section double-padded">
|
||||
<p>Checks a flat list for all unique values. Returns True if list values are all unique and False if list values aren't all unique.</p>
|
||||
<p>This function compares the length of the list with length of the set() of the list. set() removes duplicate values from the list.</p>
|
||||
|
||||
<pre class="language-python">def all_unique(lst):
|
||||
return len(lst) == len(set(lst))</pre>
|
||||
<label class="collapse">Show examples</label>
|
||||
<pre class="language-python">x = [1,2,3,4,5,6]
|
||||
y = [1,2,2,3,4,5]
|
||||
all_unique(x) # True
|
||||
all_unique(y) # False</pre>
|
||||
<button class="primary clipboard-copy">📋 Copy to clipboard</button></div>
|
||||
|
||||
</div><button class="scroll-to-top">↑</button>
|
||||
<footer><p style="display:inline-block"><strong>30 seconds of python code</strong> is licensed under the <a href="https://github.com/kriadmin/30-seconds-of-python-code/blob/master/LICENSE">GPL-3.0</a> license.<br>Icons made by <a href="https://www.flaticon.com/authors/smashicons">Smashicons</a> from <a href="https://www.flaticon.com/">www.flaticon.com</a> is licensed by <a href="http://creativecommons.org/licenses/by/3.0/">CC 3.0 BY</a>.<br>Ribbon made by <a href="https://github.com/tholman/github-corners">Tim Holman</a> is licensed by <a href="https://opensource.org/licenses/MIT">The MIT License</a><br>Built with the <a href="https://minicss.org">mini.css framework</a>.</p></footer>
|
||||
</main></div>{% endblock %}
|
||||
Reference in New Issue
Block a user