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‎002_Python_Functions_Built_in/002_Python_any().ipynb

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{
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"cells": [
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"cell_type": "markdown",
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"source": [
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"<small><small><i>\n",
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"All the IPython Notebooks in this lecture series by Dr. Milan Parmar are available @ **[GitHub](https://github.com/milaan9/04_Python_Functions/tree/main/002_Python_Functions_Built_in)**\n",
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"</i></small></small>"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"# Python `any()`\n",
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"\n",
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"The **`any()`** function returns **`True`** if any element of an iterable is True. If not, **`any()`** returns **`False`**.\n",
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"\n",
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"**Syntax**:\n",
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"\n",
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"```python\n",
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"any(iterable)\n",
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"```"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Parameters for the `any()` function\n",
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"\n",
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"The **`any()`** function takes an iterable (list, string, dictionary etc.) in Python."
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Value Returned by the `any()` function\n",
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"\n",
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"The **`any()`** function returns a boolean value:\n",
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"\n",
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"* **`True`** if at least one element of an iterable is true\n",
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"* **`False`** if all elements are false or if an iterable is empty\n",
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"\n",
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"| Condition | Return Value |\n",
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"|:----| :--- |\n",
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"| **All values are true** | **True** |\n",
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"| **All values are false** | **False** |\n",
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"| **One value is true (others are false)** | **True** |\n",
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"| **One value is false (others are true)** | **True** |\n",
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"| **Empty Iterable** | **False** |"
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"end_time": "2021-06-14T09:48:10.376600Z",
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"start_time": "2021-06-14T09:48:10.363419Z"
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"True\n",
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"False\n",
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"True\n",
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"False\n"
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]
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}
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],
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"source": [
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"# Example 1: Using any() on Python Lists\n",
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"\n",
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"# True since 1,3 and 4 (at least one) is true\n",
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"l = [1, 3, 4, 0]\n",
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"print(any(l))\n",
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"\n",
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"# False since both are False\n",
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"l = [0, False]\n",
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"print(any(l))\n",
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"\n",
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"# True since 5 is true\n",
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"l = [0, False, 5]\n",
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"print(any(l))\n",
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"\n",
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"# False since iterable is empty\n",
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"l = []\n",
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"print(any(l))"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"The **`any()`** method works in a similar way for **[tuples](https://github.com/milaan9/02_Python_Datatypes/blob/main/004_Python_Tuple.ipynb)** and **[sets](https://github.com/milaan9/02_Python_Datatypes/blob/main/006_Python_Sets.ipynb)** like lists."
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]
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},
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{
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"execution_count": 2,
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"metadata": {
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"ExecuteTime": {
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"end_time": "2021-06-14T09:48:13.464474Z",
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"start_time": "2021-06-14T09:48:13.457639Z"
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}
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},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"True\n",
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"True\n",
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"False\n"
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]
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}
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],
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"source": [
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"# Example 2: Using any() on Python Strings\n",
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"\n",
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"# Atleast one (in fact all) elements are True\n",
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"s = \"This is good\"\n",
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"print(any(s))\n",
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"\n",
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"# 0 is False because it is a non-iterable number\n",
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"# '0' is True because now it is not a number, it is a string character\n",
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"s = '000'\n",
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"print(any(s))\n",
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"\n",
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"# False since empty iterable\n",
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"s = ''\n",
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"print(any(s))"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"metadata": {
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"end_time": "2021-06-14T09:48:14.250605Z",
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"outputs": [
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{
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"name": "stdout",
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"text": [
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"False\n",
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"True\n",
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"False\n",
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"False\n",
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"True\n"
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]
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}
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],
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"source": [
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"# Example 3: Using any() with Python Dictionaries\n",
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"\n",
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"# In the case of dictionaries, if all keys (not values) are false or the dictionary is empty, \n",
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"# `any()` returns `False`. If at least one key is true, `any()` returns `True`.\n",
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"\n",
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"# 0 is False\n",
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"d = {0: 'False'}\n",
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"print(any(d))\n",
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"\n",
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"# 1 is True\n",
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"d = {0: 'False', 1: 'True'}\n",
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"print(any(d))\n",
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"\n",
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"# 0 and False are false\n",
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"d = {0: 'False', False: 0}\n",
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"print(any(d))\n",
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"\n",
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"# iterable is empty\n",
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"d = {}\n",
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"print(any(d))\n",
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"\n",
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"# 0 is False\n",
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"# '0' is True\n",
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"d = {'0': 'False'}\n",
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"print(any(d))"
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]
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},
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