Chapter 3: Problem 15

What are the variables that receive pieces of data in a module called?

Short Answer

Expert verified

Answer: To use variables defined in a Python module, you need to import the module and then access the variables using dot notation. For example, if a module named "constants.py" contains the variables `PI` and `E`, you can import and use them in another part of the program as follows: ``` import constants print("Pi value:", constants.PI) print("Euler's number:", constants.E) ```

Step by step solution

Understand modules and variables

First, let's clarify what a module is. A module is a separate unit of code that can be imported and reused in other programs. In Python, modules can be written as individual .py files. Now, let's define variables. Variables are symbolic names that store values or pieces of data in a program.

Identify variables in a module

Whenever a module is developed, some variables are defined to store data. These variables receive pieces of data that can be then used inside the module or by other modules that import it. Examples of such variables are constants, global variables, or even helper functions if they hold data.

See an example of variables in a module

Let's consider a simple module called "constants.py" which holds a few mathematical constants: ``` # constants.py PI = 3.14159 E = 2.71828 ``` In this example, `PI` and `E` are the variables that store the values of the mathematical constants pi and e, respectively. These variables can be imported and used in other parts of the program.

Import and use variables from the module

To use the variables defined in a module, you need to import the module and then access the variables using dot notation. Here's an example: ``` # main.py import constants print("Pi value:", constants.PI) print("Euler's number:", constants.E) ``` In this example, we"ve imported the "constants.py" module and accessed its variables `PI` and `E` using dot notation (`constants.PI` and `constants.E`).

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What are the variables that receive pieces of data in a module called?

Short Answer

Step by step solution

Understand modules and variables

Identify variables in a module

See an example of variables in a module

Import and use variables from the module

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