Added improved version.py

.gitignore

 build
 dist
-version.py
 .coverage
 *.extracted
 *.pyc

src/binwalk/core/version.py

+try:
+    from importlib import metadata
+    get_version = lambda : metadata.version("binwalk")
+except ImportError:
+    try:
+        # Running on pre-3.8 Python; use importlib-metadata package
+        import importlib_metadata as metadata
+        get_version = lambda: metadata.version("binwalk")
+    except ImportError:
+        # 3rd fallback via pkg_resources
+        import pkg_resources
+        get_version = lambda : pkg_resources.get_distribution("binwalk").version
+
+__version__ = get_version()