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README.md

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`‎README.md`

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Original file line number	Diff line number	Diff line change
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`1`	`1`	`# Python Cheatsheet`
`2`	`2`
	`3`	`+# Table of Content`
	`4`	`+`
	`5`	`+`
	`6`	`+<!-- vim-markdown-toc GFM -->`
	`7`	`+`
	`8`	`+* [Main](#main)`
	`9`	`+* [Basic and necessary commands needed to execute a well-defined python code at the command line.](#basic-and-necessary-commands-needed-to-execute-a-well-defined-python-code-at-the-command-line)`
	`10`	`+ * [Opening a python shell.](#opening-a-python-shell)`
	`11`	`+ * [Installing a package](#installing-a-package)`
	`12`	`+ * [Running a python script](#running-a-python-script)`
	`13`	`+ * [Calculating the time of execution](#calculating-the-time-of-execution)`
	`14`	`+ * [Importing a py script](#importing-a-py-script)`
	`15`	`+* [Getting started with the language](#getting-started-with-the-language)`
	`16`	`+ * [Basic I/O](#basic-io)`
	`17`	`+ * [Variables and Constants](#variables-and-constants)`
	`18`	`+ * [Conditional Statements](#conditional-statements)`
	`19`	`+ * [Iterative statements](#iterative-statements)`
	`20`	`+ * [String formatting](#string-formatting)`
	`21`	`+* [Function](#function)`
	`22`	`+ * [Function Call](#function-call)`
	`23`	`+* [Data Structures](#data-structures)`
	`24`	`+ * [Lists](#lists)`
	`25`	`+ * [Dictionaries](#dictionaries)`
	`26`	`+ * [Tuple](#tuple)`
	`27`	`+ * [Changing Tuple Values](#changing-tuple-values)`
	`28`	`+ * [Creating tuple with one item](#creating-tuple-with-one-item)`
	`29`	`+ * [Deleting a tuple](#deleting-a-tuple)`
	`30`	`+* [Pandas](#pandas)`
	`31`	`+* [NLTK](#nltk)`
	`32`	`+* [Errors and Exceptions](#errors-and-exceptions)`
	`33`	`+ * [Exceptions](#exceptions)`
	`34`	`+* [Python Snippets](#python-snippets)`
	`35`	`+ * [Anagrams](#anagrams)`
	`36`	`+ * [Memory](#memory)`
	`37`	`+ * [Print a string N times](#print-a-string-n-times)`
	`38`	`+ * [Chunk](#chunk)`
	`39`	`+ * [Get vowels](#get-vowels)`
	`40`	`+ * [Length of Last Word in a string](#length-of-last-word-in-a-string)`
	`41`	`+ * [Valid Palindrome](#valid-palindrome)`
	`42`	`+ * [Check Lowercase](#check-lowercase)`
	`43`	`+ * [Count Negatives in a sorted Matrix](#count-negatives-in-a-sorted-matrix)`
	`44`	`+ * [Write to file](#write-to-file)`
	`45`	`+ * [Median of given array](#median-of-given-array)`
	`46`	`+ * [Even or Odd](#even-or-odd)`
	`47`	`+ * [Palindrome](#palindrome)`
	`48`	`+`
	`49`	`+<!-- vim-markdown-toc -->`
	`50`	`+`
	`51`	`+`
`3`	`52`	`## Main`
`4`	`53`	```python
`5`	`54`	`if __name__ == '__main__': # If file is not imported, this will be executed`
`@@ -161,7 +210,7 @@ def getPerson(name, age) :`
`161`	`210`	`return person`
`162`	`211`	```
`163`	`212`
`164`		`-#### Function Call`
	`213`	`+### Function Call`
`165`	`214`	`Functions can be called by passing the arguments according to the declaration.`
`166`	`215`	```python
`167`	`216`	`a = 20`
`@@ -260,7 +309,7 @@ del this_tuple`
`260`	`309`	`print(this_tuple) # ERROR: this_tuple is not defined`
`261`	`310`	`## Third party libraries`
`262`	`311`	```
`263`		`-### Pandas`
	`312`	`+## Pandas`
`264`	`313`	```shell
`265`	`314`	`$ sudo pip3 install pandas # Installing pandas module in Ubuntu`
`266`	`315`	```
`@@ -272,7 +321,7 @@ import pandas as pd`
`272`	`321`	`<dataframe>.info() # Gives some information like, row and column datatypes, non-null count, and memory usage`
`273`	`322`	`<dataframe>.describe() # Provides some descriptive statistics about the numerical rows in the dataframe`
`274`	`323`	```
`275`		`-### NLTK`
	`324`	`+## NLTK`
`276`	`325`	```shell
`277`	`326`	`$ sudo pip3 install nltk # Installing nltk module in Ubuntu`
`278`	`327`	```
`@@ -288,7 +337,7 @@ nltk.download('averaged_perceptron_tagger')`
`288`	`337`	`Program stops working on error Python raises exceptions when it encounter error.`
`289`	`338`	To avoid this, `try-catch` blocks are used.
`290`	`339`
`291`		`-# Exceptions`
	`340`	`+### Exceptions`
`292`	`341`	`No syntax errors found, program starts execution.`
`293`	`342`	`Errors detected during execution are called exceptions.`
`294`	`343`	`Use try: except: finally: to catch and handle the exceptions.`

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