Check in a simple pure-python based Markdown previewer.

third_party/Python-Markdown/markdown/__version__.py

+#
+# markdown/__version__.py
+#
+# version_info should conform to PEP 386
+# (major, minor, micro, alpha/beta/rc/final, #)
+# (1, 1, 2, 'alpha', 0) => "1.1.2.dev"
+# (1, 2, 0, 'beta', 2) => "1.2b2"
+version_info = (2, 6, 2, 'final', 0)
+
+
+def _get_version():
+    " Returns a PEP 386-compliant version number from version_info. "
+    assert len(version_info) == 5
+    assert version_info[3] in ('alpha', 'beta', 'rc', 'final')
+
+    parts = 2 if version_info[2] == 0 else 3
+    main = '.'.join(map(str, version_info[:parts]))
+
+    sub = ''
+    if version_info[3] == 'alpha' and version_info[4] == 0:
+        # TODO: maybe append some sort of git info here??
+        sub = '.dev'
+    elif version_info[3] != 'final':
+        mapping = {'alpha': 'a', 'beta': 'b', 'rc': 'c'}
+        sub = mapping[version_info[3]] + str(version_info[4])
+
+    return str(main + sub)
+
+version = _get_version()