Introduction to Python
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This document provides an introduction to the Python programming language. It outlines the agenda which includes information about the presenter, what Python is, why use Python, and a Python 101 section. Under the Python 101 section, it describes key Python concepts like variables, data types, operations, conditional statements, loops, and functions. It provides examples and explanations of integers, floats, strings, lists, tuples, dictionaries, if/else statements, for loops, while loops, try/except, and functions. The overall document serves as a high-level overview of Python to introduce attendees to its basic features and capabilities.
![Python 101
DATA TYPES
◦ Lists
◦ Compound data types
◦ Normally related but can have different types into them
◦ Alist = [1, 3, 4, 5]
◦ Blist = [1, "a", 3]
◦ Starts from index 0
◦ Operations: append, add, delete, index](https://image.slidesharecdn.com/introductiontopython-151016084723-lva1-app6891/85/Introduction-to-Python-11-320.jpg)
![Python 101
CHOICES AND DECISIONS
◦ For loops
◦ Looping through an iterable
◦ Iterabile: everything we can loop over: collection, string, tuples
◦ We can loop through a sequence of numbers
food = ["ciorba de fasole", "ceafa", "cartofi prajiti", "clatite"]
for theFood in food:
print (food)
for x in range (5):
print (x)](https://image.slidesharecdn.com/introductiontopython-151016084723-lva1-app6891/85/Introduction-to-Python-15-320.jpg)
Introduction to Python
- 1. Introduction to Python BOGDAN SABAU 6 JUNE 2015, SOFTVISION
- 2. Agenda ◦ About me ◦ What is Python ◦ Why use Python ◦ Python 101 ◦ QA
- 3. About me
- 4. What is Python oWidely used high-level programming language oCreated in Netherlands by Guido van Rossum at the end of the 80s oNamed after Monthy Python oStrong emphasizes on code readability and simplicity oSupports multiple programming paradigms oNOT A SNAKE!
- 5. What is Python oWidely used high-level programming language oCreated in Netherlands by Guido van Rossum at the end of the 80s oNamed after Monthy Python oStrong emphasizes on code readability and simplicity oSupports multiple programming paradigms oNOT A SNAKE!
- 6. Why use Python oSimplicity oFewer lines => less buggy code and reduce development time o3rd party resources oAvailable on multiple OS oOpen source and mature oUsed by: Google, Dropbox, Eventbrite, Quora, SlideShare, Reedit
- 7. Python 101 oTwo main versions: 2.x and 3.x oIDE: IDLE, PyDev, PyCharm, Visual Studio oOnline jupyter.org oINDENTATION COUNTS!
- 8. Python 101 VARIABLES ◦ Must have an initial value ◦ We can define multiple variables at once ◦ Case sensitive ◦ Can contain letter, number or underscore ◦ Some reserved word cannot be used
- 9. Python 101 OPERATIONS ◦ Addition (+) ◦ Subtraction (-) ◦ Multiplication (*) ◦ Division (/) ◦ Floor division (//) ◦ Modulus (%) ◦ Exponent (**)
- 10. Python 101 DATA TYPES ◦ Integers ◦ 23, -4, 99934 ◦ Float ◦ 0.333, -8.8, 883.009 ◦ String ◦ “Hola Buenes", ‘Arturo Maran’ ◦ Value of index cannot be changed!
- 11. Python 101 DATA TYPES ◦ Lists ◦ Compound data types ◦ Normally related but can have different types into them ◦ Alist = [1, 3, 4, 5] ◦ Blist = [1, "a", 3] ◦ Starts from index 0 ◦ Operations: append, add, delete, index
- 12. Python 101 DATA TYPES ◦ Tuples ◦ Same structure like a list ◦ Difference is that values cannot be change ◦ Ex: Months = ("Jan", "Feb", …, "Dec")
- 13. Python 101 DATA TYPES ◦ Dictionaries ◦ Look-up tables ◦ Maps a value to a key ◦ Duplicate keys are not allowed, instead we can have duplicate values ◦ User_Ages = {"Sabu":30, "Radel":78, "Sighi":18} ◦ Keys are immutable strings, values, tuples
- 14. Python 101 CHOICES AND DECISIONS ◦ Conditional statements ◦ !=, <, <=, >, >=, == ◦ Logical operators: and, or, not ◦ If statement If condition_true: do A elseif: do B elseif: do C else do SomethingElse
- 15. Python 101 CHOICES AND DECISIONS ◦ For loops ◦ Looping through an iterable ◦ Iterabile: everything we can loop over: collection, string, tuples ◦ We can loop through a sequence of numbers food = ["ciorba de fasole", "ceafa", "cartofi prajiti", "clatite"] for theFood in food: print (food) for x in range (5): print (x)
- 16. Python 101 CHOICES AND DECISIONS ◦ While loop ◦ Repeatedly executes instruction inside a loop until a condition is met ◦ While conditions is true, execute things ◦ We can loop inside using break or continue ◦ Try Except ◦ Controls how the program behave when an error occurs
- 17. Python 101 FUNCTION ◦ Pre-written code that performs a certain task ◦ Calling it by typing the function name (non OOP) or by dot notation when is part of a class (OOP) ◦ Can have parameters ◦ Can return a value
- 18. QA Please have mercy …