CSV Toolkit

Command-line CSV manipulation — view, filter, sort, select, convert, stats, dedup, and merge. Pure Python, no dependencies.

Quick Start

# View as formatted table
python3 scripts/csv_toolkit.py view data.csv
python3 scripts/csv_toolkit.py view data.csv --head 10

# Filter rows
python3 scripts/csv_toolkit.py filter data.csv -w 'age>30' 'city==Chicago'

# Sort
python3 scripts/csv_toolkit.py sort data.csv --by salary --desc

# Select columns
python3 scripts/csv_toolkit.py select data.csv -c "name,email,salary"

# Convert to JSON
python3 scripts/csv_toolkit.py to-json data.csv -o data.json

# Convert JSON back to CSV
python3 scripts/csv_toolkit.py from-json data.json -o data.csv

# Column statistics
python3 scripts/csv_toolkit.py stats data.csv -c "age,salary"

# Remove duplicates
python3 scripts/csv_toolkit.py dedup data.csv -o clean.csv

# Merge files
python3 scripts/csv_toolkit.py merge file1.csv file2.csv -o combined.csv

Commands

| Command | Description | |---------|-------------| | view | Display CSV as a formatted table. Use --head N / --tail N to limit rows. | | filter | Filter rows with -w conditions: col>val, col==val, col!=val, col<=val. Multiple conditions = AND. | | sort | Sort by column with --by col. Add --desc for descending. Numeric-aware. | | select | Pick columns with -c "col1,col2". | | to-json | Convert CSV to JSON array of objects. Auto-detects numbers. | | from-json | Convert a JSON array of objects to CSV. | | stats | Column statistics: count, unique values, min/max/mean/median for numeric columns. | | dedup | Remove duplicate rows. | | merge | Concatenate multiple CSV files (same headers). |

Global Options

| Flag | Description | |------|-------------| | -d, --delimiter | Field delimiter (default: ,). Use -d '\t' for TSV. | | --encoding | File encoding (default: utf-8). | | -o, --output | Write result to file instead of stdout. |