move line counter to python

sz.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+import os
+import token
+import tokenize
+import itertools
+from tabulate import tabulate
+
+TOKEN_WHITELIST = [token.OP, token.NAME, token.NUMBER, token.STRING]
+
+if __name__ == "__main__":
+  headers = ["Name", "Lines", "Tokens/Line"]
+  table = []
+  for path, subdirs, files in os.walk("tinygrad"):
+    for name in files:
+      if not name.endswith(".py"): continue
+      filepath = os.path.join(path, name)
+      with tokenize.open(filepath) as file_:
+        tokens = [t for t in tokenize.generate_tokens(file_.readline) if t.type in TOKEN_WHITELIST]
+        token_count, line_count = len(tokens), len(set([t.start[0] for t in tokens]))
+        table.append([filepath, line_count, token_count/line_count])
+
+  print(tabulate([headers] + sorted(table, key=lambda x: -x[1]), headers="firstrow", floatfmt=".1f")+"\n")
+
+  for dir_name, group in itertools.groupby(sorted([(x[0].rsplit("/", 1)[0], x[1]) for x in table]), key=lambda x:x[0]):
+    print(f"{dir_name:30s} : {sum([x[1] for x in group]):6d}")
+
+  print(f"\ntotal line count: {sum([x[1] for x in table])}")