Program to define a module and import a specific function in that module to another program

Let's create a simple calculator module with basic operations:

Algorithm:

1. Create calculator.py module with functions:
   • Define add(x,y) function
   • Define subtract(x,y) function
   • Define multiply(x,y) function
   • Define divide(x,y) function with zero division check
2. In main program:
   • Import only multiply function from calculator module
   • Get two numbers from user
   • Call multiply function with user inputs
   • Display result

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Pseudocode:

// calculator.py module
FUNCTION add(x, y)
    RETURN x + y
END FUNCTION

FUNCTION subtract(x, y)
    RETURN x - y
END FUNCTION

FUNCTION multiply(x, y)
    RETURN x * y
END FUNCTION

FUNCTION divide(x, y)
    IF y != 0 THEN
        RETURN x / y
    ELSE
        RETURN "Error: Division by zero"
    END IF
END FUNCTION

// Main program
FROM calculator IMPORT multiply

OUTPUT "Enter first number: "
INPUT num1

OUTPUT "Enter second number: "
INPUT num2

result = multiply(num1, num2)

OUTPUT "Result of multiplication: " + result

Program:

1. First File (calculator.py) - The Module:

# calculator.py - module

def add(x, y):
    return x + y

def subtract(x, y):
    return x - y

def multiply(x, y):
    return x * y

def divide(x, y):
    if y != 0:
        return x / y
    return "Error: Division by zero"

2. Second File (main.py) - Main Program:

# Import specific function from calculator module
from calculator import multiply

# Get input from user
num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))

# Use the imported multiply function
result = multiply(num1, num2)

# Display result
print(f"Result of multiplication: {result}")

Flowchart:

flowchart TD subgraph Module[calculator.py Module] A1[Add Function] A2[/Input: x, y/] A3[Return x + y] S1[Subtract Function] S2[/Input: x, y/] S3[Return x - y] M1[Multiply Function] M2[/Input: x, y/] M3[Return x * y] D1[Divide Function] D2[/Input: x, y/] D3{y != 0?} D4[Return x / y] D5[Return Error] A1 --> A2 --> A3 S1 --> S2 --> S3 M1 --> M2 --> M3 D1 --> D2 --> D3 D3 -->|Yes| D4 D3 -->|No| D5 end subgraph Main[Main Program] P1([Start]) P2[[Import multiply from calculator]] P3[/Input first number/] P4[/Input second number/] P5[Call multiply function] P6[/Display result/] P7([End]) P1 --> P2 P2 --> P3 P3 --> P4 P4 --> P5 P5 --> P6 P6 --> P7 end

Important!
If you find any mistakes in my code or flowchart, please comment below this post. I will be happy to correct them and clear up any doubts you may have.

Program to define a module and import a specific function in that module to another program