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What is GitHub?

• GitHub is a hosted Git service (version control system)
• It is very popular for hosting Open Source projects
• It is used to "Sign in with GitHub" to a lot of development Tools 

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What is PYTHON?

Python is an interpreted, object-oriented, high-level programming language with dynamic semantics. [Used ] for Rapid Application Development, as well as for use as a scripting or glue language to connect existing components together.

Python's simple, easy to learn syntax emphasizes readability and therefore reduces the cost of program maintenance.

Python supports modules and packages, which encourages program modularity and code reuse. The Python interpreter and the extensive standard library are available in source or binary form without charge for all major platforms, and can be freely distributed. [2]

http://redac.socialinput.fr/wp-content/uploads/2013/01/Albino_Burmese_Python.jpg

Writing our first program

"Hello, World!"

The "Hello, World!" program is the simplest program you can write in any programming language. All it does is output "Hello, World!" [3]

Writing our first program

"Hello, World!"

With our project there is a sample 01hello.py file

Variables

A variable is a storage location associated with a name.  Variables contain an unknown quantity or information called value [4]

# 01variables.py

variable = 'Juan'
print(variable)
print(type(variable))
print(id(variable))

variable = 1
print(type(variable))
print(id(variable))

variable = 1234.5678
print(type(variable))

Rules for Python Variables [5]

Variables names must start with a letter or an underscore, such as:

• _underscore
• underscore_

The remainder of your variable name may consist of letters, numbers and underscores.

• password1
• n00b
• un_der_scores

Names are case sensitive.

• case_sensitive, CASE_SENSITIVE, and Case_Sensitive are each a different variable.

Concatenating Variables

#!/usr/local/bin/python3.5
# 03variables.py

name = 'Juan'
numbers = 12345
hello = 'Hello, {0}! {1}'.format(name, str(numbers))
print(hello)

Data Types

A Data Type Is classification identifying one of various types of data [6]

Data Types

Python defines several data types [7]

• Four scalar types:
  • boolean (True or False)
  • integer (negative & positive non factional numbers & zero)
  • float (floating-point number)
  • String (str)  (a series of characters)
• Collection types:
  • List (collection of object arranged by a numeric key)
  • Dictionary (collection of objects arranged by a string key)

Data Types

#!/usr/local/bin/python3.5
# 04datatypes.py

print(type(True))
print(type(12345))
print(type(5678.90123))
print(type([1, 2, 3]))
print(type({'a': 1, 'b': 2, 'c': 'something'}))

Operators

An operator in a programming language is a symbol that tells the [computer] to perform specific mathematical, relational or logical operation and produce final result. [8]

An operator is something that takes one or more values (or expressions, in programming jargon) and yields another value. [9]

Arithmetic Operators

Assignment Operator

#!/usr/local/bin/python3.5
# 05operators.py
a = 1;
b = 2;
three = a + b;

print(three)

The assignment operator "=" is used to assign a value to a variable. It is not used to compare!

Comparison Operators

Comparison Operators

#!/usr/local/bin/python3.5
# 06comparison_operators.py

print(1 == 2)       # FALSE
print(1 < 2)        # TRUE
print(1 <= 2)       # TRUE
print(2 > 2)        # FALSE
print(2 >= 2)       # TRUE
print(1 == True)    # TRUE
print(1 != True)    # FALSE

The assignment operator "=" is used to assign a value to a variable. It is not used to compare!