Python Review Notes PDF

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Summary

A simple review of the functions in python. It has basic definitions as well as some of the advance functions...

Description

Variable - can assign any data and can name anything What you can assign a variable: Data Types Integers: a whole number (ex. 1 or -5) Float: a “decimal” number (ex. 4.3 or 2.2222222…) much flexible Boolean: a value of either True or False. Can be put in a variable String: a “string” of any numbers or characters as denoted (‘ ’ or “ “) ex. “Hello World” or “:)” note - you can turn integers or floats into strings via the syntax: str(x) (https://www.programiz.com/python-programming/keyword-list) Keywords: these are reserved by python so it can follow your instructions. It’s functionality does not change. For example: - True, False - None - Break (used in while loops), pass - import - class - def - if, elif, else - while - for - in - not (negate), or, ands - return Function: built in functions, ie, print, something python recognizes that has arguments inside its brackets. Arguments: anything contained in a function's brackets. List of variable you define in your function definition function call - calling on that function to do something. Print v.s Return print - a function that will take whatever string is in its brackets and print it in to the terminal return - will return a value, gives a value later on and can be used outside your function You can have nested if statements. if and elif can have a condition after them but not in else Operators - uses to manipulate or check data Boolean Comparisons: and, or, not (https://www.programiz.com/python-programming/operators) Arithmetic operators

Operator

Meaning

Example

+

Add two operands

x+y+2

-

Subtract right operand from left

x - y -2

*

Multiply two operands

x*y

/

Divide left operand by the right one (always results into float)

x/y

%

Modulus - remainder of the division of left operand by the right

x % y (remainder of x/y) 10 % 3 → 3*3+1 → 1

//

Floor division - division that results into whole numbers adjusted to the left in the number line

x // y 5 // 2 → 2.5 → 2

**

Exponent - left operand raised to the power of right

x ** y (x to the power of y)

Operator

Meaning

Example

>

Greater than - True if left operand is greater than the right

x>y

<

Less tha - True if left operand is less than the right

x=

Greater than or equal to - True if left operand is greater than or equal to the right

x >= y...