Store version information in src/pyodide.py

Makefile

@@ -160,6 +160,10 @@ root/.built: \
 	cp src/_testcapi.py	root/lib/python$(PYMINOR)
 	cp src/pystone.py root/lib/python$(PYMINOR)
 	cp src/pyodide.py root/lib/python$(PYMINOR)/site-packages
+	if command -v git > /dev/null 2>&1 \
+			&& git describe --tags > /dev/null 2>&1; then \
+	sed -i "s/__version__ =.*/__version__ = '$(shell git describe --tags)'/g" root/lib/python$(PYMINOR)/site-packages/pyodide.py; \
+	fi
 	( \
 		cd root/lib/python$(PYMINOR); \
 		rm -fr `cat ../../../remove_modules.txt`; \

src/pyodide.py

@@ -7,6 +7,8 @@ from js import XMLHttpRequest
 import ast
 import io
 
+__version__ = '0.1.0'
+
 
 def open_url(url):
     """