Improve dev workflow: use python3 and auto-unzip ISO-639-3 tables in Makefile; update .gitignore and README

.gitignore

@@ -1 +1,5 @@
 __pycache__
+# Ignore the extracted ISO 639-3 code tables directory and its zip archive.
+# These files are likely large data resources not needed in version control.
+iso-639-3_Code_Tables_20240415/
+iso-639-3_Code_Tables_20240415.zip

Makefile

@@ -4,9 +4,10 @@ init:
 get-table:
 	# https://iso639-3.sil.org/code_tables/download_tables
 	wget https://iso639-3.sil.org/sites/iso639-3/files/downloads/iso-639-3_Code_Tables_20240415.zip
+	unzip -o iso-639-3_Code_Tables_20240415.zip
 
 combine-wikipedia:
 	cat wikipedia_languages.csv  wikipedia_languages_extra.csv > wikipedia_languages_all.csv
 
 generate:
-	python generate.py
+	python3 generate.py

README.md

@@ -7,13 +7,42 @@ web-languages dataset.
 
 
 
-## Installing, etc.
+## Install dependencies:
+**Note:** This project requires Python 3.
 
+## Setup
+
+Install dependencies:
+
+```bash
+make init
+```
+
+Download and extract ISO-639-3 tables:
+```
+make get-table
 ```
-make install
 
+(Optional) Combine Wikipedia language files:
+```
+make combine-wikipedia
 ```
 
+Generate language Markdown files:
+```
+make generate
+```
+
+Downloaded data files (e.g., ISO-639-3 tables) are excluded from version control via `.gitignore`.
+
+## Makefile Targets
+
+| Target             | Description                                      |
+|--------------------|--------------------------------------------------|
+| init               | Install Python dependencies                      |
+| get-table          | Download and unzip ISO-639-3 tables              |
+| combine-wikipedia  | Combine Wikipedia language CSVs                  |
+| generate           | Generate Markdown files from data                |
 
 ## License