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Codecademy's Python 2 Course
https://www.codecademy.com/courses/learn-python/lessons/python-syntax/
It's gratis and accepts Python 3 syntax.
Object-oriented
"The main goal of an object oriented language is to make code reusable – we do this through the use of classes and objects. If we want to design a new type of car, we can start with what they all have in common: wheels, seats, a frame. Now that we’ve determined what cars have in common, we can more easily implement any type of car we want by starting from that basic blueprint."
https://discuss.codecademy.com/t/what-does-it-mean-that-python-is-an-object-oriented-language/297314
Errors (ex5)
"Mismatched quotes will cause a SyntaxError'
"SyntaxError: EOL while scanning a string literal"
No quotes will cause a NameError (interprets strings as commands. )
Math (ex6)
mirthful_addition = 12381 + 91817
amazing_subtraction = 981 - 312
trippy_multiplication = 38 * 902
happy_division = 540 / 45
sassy_combinations = 129 * 1345 + 120 / 6 - 12
Find the remainder of a number using %
is_this_number_odd = 15 % 2
is_this_number_divisible_by_seven = 133 % 7
Updating variables / operators.
sandwich_price += sales_tax
is the same as:
sandwich_price = sandwich_price + sales_tax
but is much shorter.
Comments
Are indicated by # or """This is not for running"""
Numbers
An integer is like 5, a float is a number with a decimal point like 5.0. They can also be in scientific notation like 2.3e7
To make sure math like 7/2 = 3.5 is correct is by inputting it into Python like 7./2. or float(7)/2
Strings
Multi-line strings are marked by """Mulit- line strings"""
Booleans (True/False)
True = int(1) False = int(0)
Fun Projects
Design a shop using Ex7 and Ex9 as a frame:
7:
money_in_wallet = 40
sandwich_price = 7.50
sales_tax = .08 * sandwich_price
sandwich_price += sales_tax
money_in_wallet -= sandwich_price
9:
cucumbers = 1
price_per_cucumber = 3.25
total_cost = cucumbers * price_per_cucumber
print(total_cost)