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Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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### Module 2.7.1: Enter the Output of Modules This section focuses on understanding the output of Python modules using functions across different files (`main.py`, `first.py`, and `second.py`). #### `main.py` ```python import first def one(number): return number ** 2 def two(number): return number * 8 def three(number): return one(number) - two(number) print(three(2)) print(first.three(2)) print(first.four(2)) ``` #### `first.py` ```python import second def one(number): return number - 1 def two(number): return number + 9 def three(number): return one(number) * two(number) def four(number): return second.three(number) ``` #### `second.py` ```python def one(number): return number * 4 def two(number): return number - 5 def three(number): return number + 6 ``` ### Explanation - **main.py**: The program defines three functions: - `one(number)` calculates the square of `number`. - `two(number)` multiplies `number` by 8. - `three(number)` subtracts the result of `two(number)` from `one(number)`. - It prints the result of calling `three(2)`, `first.three(2)`, and `first.four(2)`. - **first.py**: The program imports `second.py` and defines four functions: - `one(number)` subtracts 1 from `number`. - `two(number)` adds 9 to `number`. - `three(number)` multiplies `one(number)` and `two(number)`. - `four(number)` calls `second.three(number)` and returns the result. - **second.py**: The program defines three functions: - `one(number)` multiplies `number` by 4. - `two(number)` subtracts 5 from `number`. - `three(number)` adds 6 to `number`. This script helps in understanding the flow of data and function calls between different modules in a Python program.
Transcribed Image Text:### Module 2.7.1: Enter the Output of Modules This section focuses on understanding the output of Python modules using functions across different files (`main.py`, `first.py`, and `second.py`). #### `main.py` ```python import first def one(number): return number ** 2 def two(number): return number * 8 def three(number): return one(number) - two(number) print(three(2)) print(first.three(2)) print(first.four(2)) ``` #### `first.py` ```python import second def one(number): return number - 1 def two(number): return number + 9 def three(number): return one(number) * two(number) def four(number): return second.three(number) ``` #### `second.py` ```python def one(number): return number * 4 def two(number): return number - 5 def three(number): return number + 6 ``` ### Explanation - **main.py**: The program defines three functions: - `one(number)` calculates the square of `number`. - `two(number)` multiplies `number` by 8. - `three(number)` subtracts the result of `two(number)` from `one(number)`. - It prints the result of calling `three(2)`, `first.three(2)`, and `first.four(2)`. - **first.py**: The program imports `second.py` and defines four functions: - `one(number)` subtracts 1 from `number`. - `two(number)` adds 9 to `number`. - `three(number)` multiplies `one(number)` and `two(number)`. - `four(number)` calls `second.three(number)` and returns the result. - **second.py**: The program defines three functions: - `one(number)` multiplies `number` by 4. - `two(number)` subtracts 5 from `number`. - `three(number)` adds 6 to `number`. This script helps in understanding the flow of data and function calls between different modules in a Python program.
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Question 1

In the above program, in the "first" module, the "second" module has been imported.

In the "main" module, the "first" module has been imported.

 

The function call of any module will be specified with the module name in the beginning.

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