formalised project structure

bcrypt/lib/format.py

@@ -0,0 +1,17 @@
+from typing import Any
+from bcrypt.lib.math import clamp_min
+
+'''
+Apply left padding to str(x) for parameter x: Any 
+'''
+def lpad(x: Any, n: int, pad: chr = ' ') -> str:
+    x = str(x)
+    width = clamp_min(n - len(x), 0)
+    return width * pad + x
+
+'''
+Left pad an integer's binary representation with zeros 
+'''
+def lpadbin(x: int, n: int) -> str:
+    return lpad(bin(x)[2:], n, pad='0')
+