Python is an open source, highly interactive, object oriented, interpreted, easy programming language powered by Python Software Foundation PSF. It can be easily integrated to various IT fields such as web application programming, automation scripting, data science, machine learning, mathematical computing

1. Introduction to the basic of
Python programming
BY TIB Academy(Tibacademy@gmail.compython.com)

2. A little about me
{
“Name”: “TIB Academy”,
“Origin”: {“India”: “Bangalore”, “City”:
“Lives”: [“Bangalore”, 2016],
“Marathalli”},
“Other”: [:“Trainer”, “Start a Career with Python”]
}

3. Why this Meetup Group?
 Promote the usage of Python
Gather people from different industries and backgrounds
Teach and Learn
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4. What will be covered
 Recap of Parts 1 and 2
import, Modules and Packages
Python in action
Note: Links
www.tibacademy.in
www.traininginbangalore.com
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5. A little recap
 Python is an interpreted language (CPython is the reference interpreter)
Variables are names bound to objects stored in memory
Data Types: immutable or mutable
Data Types: Numbers (int, float, bool), Sequences (str, tuple, list, bytes,
bytearray), set, dict
Control Flow: if statement, for loop, while loop
Iterables are container objects capable of returning their elements one at a time
Iterators implement the methods iter and next
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6. A little recap
 Python is an interpreted language (CPython is the reference interpreter)
Variables are names bound to objects stored in memory
Data Types: immutable or mutable
Data Types: Numbers (int, float, bool), Sequences (str, tuple, list, bytes,
bytearray), set, dict
Control Flow: if statement, for loop, while loop
Iterables are container objects capable of returning their elements one at a time
Iterators implement the methods iter and next
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7. A little recap
 Python is an interpreted language (CPython is the reference interpreter)
Variables are names bound to objects stored in memory
Data Types: immutable or mutable
Data Types: Numbers (int, float, bool), Sequences (str, tuple, list, bytes,
bytearray), set, dict
Control Flow: if statement, for loop, while loop
Iterables are container objects capable of returning their elements one at a time
Iterators implement the methods iter and next
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8. A little recap
>>>
4
>>>
2.0
>>>
True
>>>
>>>
(1,
2 + 2
4 / 2
4 > 2
x
x
= 1, 2
2)

9. A little recap
>>>
>>>
[1,
>>>
>>>
{1,
>>>
>>>
x =
x
2]
x =
x
2}
x =
x
[1, 2]
{1, 2}
{"one": 1, "two": 2}
{'two': 2, 'one': 1}

10. A little recap
 Python is an interpreted language (CPython is the reference interpreter)
Variables are names bound to objects stored in memory
Data Types: immutable or mutable
Data Types: Numbers (int, float, bool), Sequences (str, tuple, list, bytes,
bytearray), set, dict
Control Flow: if statement, for loop, while loop
Iterables are container objects capable of returning their elements one at a time
Iterators implement the methods iter and next
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11. A little recap
if x % 3 == 0 and x % 5 == 0:
return
elif x % 3
return
elif x % 5
return
else:
return
"FizzBuzz"
== 0:
"Fizz"
== 0:
"Buzz"
x

12. A little recap
colors = ["red", "green",
for color in colors:
if len(color) > 4:
print(color)
"blue", "yellow", "purple"]
stack = [1, 2, 3]
while len(stack) > 0:
print(stack.pop())

13. A little recap
 Python is an interpreted language (CPython is the reference interpreter)
Variables are names bound to objects stored in memory
Data Types: immutable or mutable
Data Types: Numbers (int, float, bool), Sequences (str, tuple, list, bytes,
bytearray), set, dict
Control Flow: if statement, for loop, while loop
Iterables are container objects capable of returning their elements one at a time
Iterators implement the methods iter and next
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14. A little recap
>>>
>>>
>>>
colors = ["red", "green", "blue",
colors_iter = colors. iter ()
"yellow", "purple"]
colors_iter
<list_iterator object at 0x100c7a160>
>>> colors_iter. next__()
'red'
…
>>> colors_iter. next__()
'purple'
>>> colors_iter. next__()
Traceback (most recent call last): File
<module>
StopIteration
"<stdin>", line 1, in

15. A little recap
colors = [(0, "red"), (1, "blue"), (2, "green"), (3, "yellow")]
for index, color
print(index,
in colors:
" --> ", color)
colors = ["red",
for index, color
print(index,
"blue", "green", "yellow", "purple"]
in enumerate(colors):
" --> ", color)

16. A little recap
 List comprehensions
Dictionary comprehensions
Functions
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 Positional Arguments
Keyword Arguments
Default parameters
Variable number of arguments
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17. A little recap
colors = ["red", "green", "blue", "yellow", "purple"]
new_colors = []
for color in colors:
if len(color) > 4:
new_colors.append(color)
new_colors = [color for color in colors if len(color) > 4]

18. Challenge
 Given a list of colors, create a new list with all the colors in uppercase. Use list
comprehensions.
colors = ["red", "green", "blue", "yellow", "purple"]
upper_colors = []
for color in colors:
upper_colors.append(color.upper())

19. A little recap
 List comprehensions
Dictionary comprehensions
Functions


 Positional Arguments
Keyword Arguments
Default parameters
Variable number of arguments
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20. A little recap
squares = {}
for i in range(10):
squares[i] = i**2
squares = {i:i**2 for i in range(10)}
{0: 0, 1: 1, 2: 4, 3:
81}
9, 4: 16, 5: 25, 6: 36, 7: 49, 8: 64, 9:

21. Challenge
 Given a list of colors, create a dictionary where each key is a color and the value is
the color written backwards. Use dict comprehensions.
colors = ["red", "green", "blue", "yellow", "purple"]
backwards_colors = {}
for color in colors:
backwards_colors[color] = color[::-1]

22. A little recap
 List comprehensions
Dictionary comprehensions
Functions


 Positional Arguments
Keyword Arguments
Default parameters
Variable number of arguments




23. A little recap
def say_hello():
print("Hello")
def add_squares(a, b):
return a**2 + b**2
>>>
13
add_squares(2, 3)
def add_squares(a, b=3):
return a**2 + b**2
>>>
13
add_squares(2)

24. A little recap
def add_squares(a, b):
return a**2 + b**2
>>> add_squares(b=3, a=2)
13

25. A little recap
def add_aquares(*args):
if len(args) == 2:
return args[0]**2 + args[1]**2
>>> add_squares(2, 3)
13

26. A little recap
def add_squares(**kwargs):
if len(kwargs) == 2:
return kwargs["a"]**2 + kwargs["b"]**2
>>> add_squares(a=2, b=3)
13

27. Challenge
 Define a function that turns a string into a list of int (operands) and strings (operators) and returns
the list.
>>>
[4,
>>>
[4,
_convert_expression("4
3, "+"]
_convert_expression("4
3, "+", 2, "*"]
3 +")
3 + 2 *")
 Hints:
 “a b”.split(“ “) = [“a”, “b”]
“a”.isnumeric() = False
int(“2”) = 2
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 Kudos for who solves in one line using lambdas and list comprehensions.

28. Challenge
 RPN = Reverse Polish Notation
4 3 + (7)
4 3 + 2 * (14)
Extend RPN calculator to support the operators *, / and sqrt (from math module).
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import math
print(math.sqrt(4))

29. Modules and Packages
 A module is a file with definitions and statements
It’s named after the file.
Modules are imported with import statement
 import <module>
 from <module> import <name1>
 from <module> import <name1>, <name2>
 import <module> as <new_module_name>
 from <module> import <name1> as <new_name1>
 from <module> import *
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30. Modules and Packages
 A package is a directory with a special file init .py (the file can be empty, and
it’s also not mandatory to exist)
The file init .py is executed when importing a package.
 Packages can contain other packages.

31. Modules and Packags
api/
init .py
rest.py
server.py
services/
init .py
rpn.py
hello.py
$ python -m api.server

32. Modules and Packages
 import api
 from api import rest
 import api.services.rpn
 from api.services.hello import say_hello
Thank you