Table of Contents

## Can class variables be used in methods Python?

In Python, we can define the variable outside the class, inside the class, and even inside the methods.

## Is there a math class in Python?

Python has a built-in module that you can use for mathematical tasks. The math module has a set of methods and constants.

**How do you use class variables in Python?**

Accessing Class Variables

- Access inside the constructor by using either self parameter or class name.
- Access class variable inside instance method by using either self of class name.
- Access from outside of class by using either object reference or class name.

### How do you do math operations in Python?

There are 7 arithmetic operators in Python : Addition. Subtraction. Multiplication….Output : 1.

Operator | Description | Syntax |
---|---|---|

+ | Addition: adds two operands | x + y |

– | Subtraction: subtracts two operands | x – y |

* | Multiplication: multiplies two operands | x * y |

/ | Division (float): divides the first operand by the second | x / y |

### What is difference between class and class object in Python?

An object is simply a collection of data (variables) and methods (functions) that act on those data. Similarly, a class is a blueprint for that object. We can think of a class as a sketch (prototype) of a house. It contains all the details about the floors, doors, windows, etc.

**Where is math module in Python?**

These modules are not written in Python but in C. You can find them (at least on linux) in a subfolder of the lib-folder called lib-dynload. The math module is then in a file math.cpython-33m.so (on windows probably with .

#### How do you write a math module in Python?

Python – Math Module

- Example: Getting Pi Value. >>> import math >>>math.
- Example: e Value. >>> import math >>> math.
- Example: Math Radians and Degrees. >>> import math >>> math.
- Example: sin, cos, tan Calculation. >>> import math >>> math.
- Example: log.
- Example: log10.
- Example: Exponent.
- Example: Exponent Operator **

#### What are class variables in Python?

Class variable − A variable that is shared by all instances of a class. Class variables are defined within a class but outside any of the class’s methods. Class variables are not used as frequently as instance variables are.

**What is a class method in Python?**

Class Methods in Python: Class methods are methods which act upon the class variables or static variables of the class. We can go for class methods when we are using only class variables (static variables) within the method. Class methods should be declared with @classmethod.

## What are the different types of class variables in Python?

Types of Class Variables in Python: Inside a class, we can have three types of variables. They are: Instance variables (object level variables) Static variables (class level variables) Local variables.

## What is the difference between @staticmethod and @classmethod in Python?

They are utility-type methods that take some parameters and work upon those parameters. On the other hand class methods must have class as a parameter. We use @classmethod decorator in python to create a class method and we use @staticmethod decorator to create a static method in python.

**How to define variables outside of a class in Python?**

In Python, we can define the variable outside the class, inside the class, and even inside the methods. Let’s see, how to use and access these variables throughout the program. The variables that are defined outside the class can be accessed by any class or any methods in the class by just writing the variable name.