Omid - Challenge 43

data-challenges
advanced-exercises
🔰 Product A Product B Product C Question Result Region 1 Region 2 Region 3
Published

March 24, 2026

Illustration for Omid - Challenge 43

Challenge Description

🔰 Product A Product B Product C Question Result Region 1 Region 2 Region 3

Solutions

library(tidyverse)
library(readxl)

input = read_excel("files/CH-043 Sort Table columns .xlsx", range = "B2:G9")
test  = read_excel("files/CH-043 Sort Table columns .xlsx", range = "J2:O9")

result =   input %>% select(Regions, names(sort(colSums(select(., -Regions)), decreasing = TRUE)))

identical(result, test)
# [1] TRUE

  • Logic:

    • Reads the workbook ranges needed for the challenge

  • Strengths:

    • The R solution stays close to the workbook rule and keeps the transformation compact.

  • Areas for Improvement:

    • The code assumes the sheet structure and source ranges remain stable.

  • Gem:

    • The strongest part of the solution is choosing the right intermediate representation before shaping the final output.
import pandas as pd
import re

input = pd.read_excel('CH-043 Sort Table columns .xlsx', usecols="B:G", skiprows=1, nrows = 7)
test = pd.read_excel('CH-043 Sort Table columns .xlsx', usecols="J:O", skiprows=1, nrows = 7)
test.columns = test.columns.str.replace(r'\.1$', '', regex=True)
                     
result = input[['Regions'] + input.drop('Regions', axis=1).sum().sort_values(ascending=False).index.tolist()]

print(result.equals(test)) # True

  • Logic:

    • Reads the workbook ranges needed for the challenge

    • Parses the text patterns directly instead of relying on manual cleanup

  • Strengths:

    • The Python version follows the same rule in a direct dataframe-oriented implementation.

  • Areas for Improvement:

    • The code assumes the workbook layout remains stable, so any sheet redesign would require small adjustments.

  • Gem:

    • The implementation stays close to the original workbook rule instead of adding unnecessary abstraction.

Difficulty Level

This task is moderate:

  • The business rule is readable, but the workbook still requires careful implementation to reach the expected layout.