Python Coding challenge - Day 638| What is the output of the following Python Code?

 

Code Explanation:

1. Importing Required Functions and Classes

from decimal import Decimal, getcontext

Purpose: Imports functionality from Python’s decimal module.

Decimal: A class that represents decimal floating-point numbers with high precision.

getcontext(): Function that gives access to the current decimal context (like precision settings).

2. Defining the high_precision() Function

def high_precision():

Defines a function named high_precision.

This function will set a custom precision and return a generator of precise decimal divisions.

3. Setting Decimal Precision

    getcontext().prec = 4

Purpose: Sets the precision for all Decimal operations inside this function.

prec = 4: Means all decimal calculations will be rounded to 4 significant digits (not 4 decimal places, but total digits).

4. Returning a Generator Expression

    return (Decimal(1) / Decimal(i) for i in range(1, 4))

Generator Expression: Creates an iterator that yields values one at a time (memory-efficient).

range(1, 4): Iterates through 1, 2, and 3.

Decimal(1) / Decimal(i): Performs high-precision division for 1/1, 1/2, and 1/3.

Yields: Three decimal values with 4-digit precision.

5. Using the Generator Output

print([float(x) for x in high_precision()])

high_precision(): Calls the function, returning a generator.

List Comprehension: Converts each precise Decimal result to a float.

float(x): Converts the Decimal values to native Python float for display.

Prints: The float values of 1/1, 1/2, and 1/3 with the applied precision.

Expected Output

[1.0, 0.5, 0.3333]

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