Files & data

import csv
import json

def csv_to_json(csv_filepath, json_filepath):
    """Convert a CSV file to a JSON file."""
    with open(csv_filepath, mode='r', newline='') as csv_file:
        reader = csv.DictReader(csv_file)
        data = [row for row in reader]

    with open(json_filepath, mode='w') as json_file:
      …

import csv
import statistics
from math import sqrt

def detect_outliers(csv_path, column_name, threshold=2.0):
    """Detect outliers in a numeric column using z-score method."""
    values = []
    with open(csv_path, 'r', newline='') as f:
        reader = csv.DictReader(f)
        if column_name not in reader.field…

import csv
import os

def split_csv(input_file, chunk_size=1000, output_prefix="chunk"):
    """Split a large CSV file into smaller chunks."""
    with open(input_file, 'r', newline='') as infile:
        reader = csv.reader(infile)
        header = next(reader)
        
        file_count = 1
        row_count = 0
  …