add more methods

bits/__init__.py

@@ -1 +1 @@
-from .main import Bits
+from .main import Bits, Bytes

bits/main.py

@@ -1,36 +1,129 @@
-"""The Bits class simplifies bit level operations.
-(c) 2020 S Groesz
-"""
-
-class Bits:
-    def __init__(self, data=None):
-        if data is None:
-            self.__raw = b''
-        else:
-            self.__raw = bytes(data)
+
+class Bits(int):
+
+    def __init__(self, byte):
+        self.__setvalue(byte)
 
     def __bytes__(self):
-        return self.__raw
+        return bytes([self.__value])
 
     def __int__(self):
-        #return int.from_bytes(bytes(self), "big") # alternative Py > 3.1
-        i = 0
-        for b in bytes(self):
-            i = i * 256 + int(b) # Python 2: int(b) -> ord(b)
-        return i
+        return self.__value
 
-    def __hash__(self):
-        return hash(bytes(self))
+    def __repr__(self):
+        ret = f'{self.__class__.__module__}.{self.__class__.__name__}'
+        ret += f'({bytes(self)})'
+        return ret
+
+    def __str__(self):
+        return self.bin()
+
+    def __index__(self):
+        return int(self)
+
+    def __len__(self):
+        return 8
+
+    def __getitem__(self, index):
+        return bool(int(self.bin()[index])) #self.bool(key)
+
+    def __setitem__(self, index, value):
+        # we'll take the easy way for now
+        s = list(self.bin())
+        # str->int->bool->int : accept bool, str, int, return either "0" or "1"
+        s[index] = str(int(bool(int(value))))
+        self.__setvalue("".join(s))
+
+    def __get__(self, instance, owner):
+        return self.bin()
+
+    def __setvalue(self, value):
+        self.__value = 0
+        if isinstance(value, int):
+            if value < 0 or value > 255:
+                raise ValueError("Integer must be between 0 and 255")
+            self.__value = value
+        elif (len(value) > 0) and (len(value) <=8):
+            for bit in range(0, len(value)):
+                self.__value += (int(bool(int(value[bit]))) *
+                                 (2 ** (len(value) - 1 - bit)))
+        else:
+            raise TypeError("Expected object with len <= 8")
+
+    def bin(self, pad=True):
+        bitcount = self.__value.bit_length()
+        if pad and ((bitcount % 8) > 0):
+            ret = "0" * (8 - (bitcount % 8))
+        return ret + bin(self.__value)[2:]
+
+    @property
+    def chr(self):
+        return chr(self.__value)
+
+    @property
+    def byte(self):
+        return bytes(self)
+
+    def reverse(self):
+        self.__setvalue(self.bin()[::-1])
+
+    @property
+    def msb(self):
+        return self.bin()[0]
+
+    @property
+    def lsb(self):
+        return self.bin()[7]
+
+    @property
+    def nibble(self):
+        return [self.bin()[:4], self.bin()[4:]]
+
+
+class Bytes(bytearray):
+
+    def __init__(self, b, *args, **kwargs):
+        self.__raw = bytearray(b)
+
+    def __bytes__(self):
+        return bytes(self.__raw)
+
+    def __int__(self):
+        return self.int()
 
     def __repr__(self):
-        return (f'{self.__class__.__name__}({bytes(self)})')
-        #return "{:08b}".format(int(self))
+        ret = f'{self.__class__.__module__}.{self.__class__.__name__}'
+        ret += f'({bytes(self)})'
+        return ret
+
+    def __index__(self):
+        return self.int()
+
+    def __getitem__(self, index):
+        if not isinstance(index, int):
+            raise TypeError
+        return Bits(self.__raw[index])
+
+    def __setitem__(self, index, value):
+        if not isinstance(index, int):
+            raise TypeError
+        self.__raw[index] = int(value)
+
+    def __delitem__(self, index):
+        del self.__raw[index]
+
+    def __test_key(self, key):
+        if not isinstance(key, int):
+            raise TypeError
+        if key >= len(self.__raw):
+            raise IndexError
+        return True
 
     def __eq__(self, compare):
-        return hash(self) == hash(compare)
+        return int(self) == int(compare)
 
     def __ne__(self, compare):
-        return hash(self) != hash(compare)
+        return int(self) != int(compare)
 
     def __lt__(self, compare):
         return int(self) < int(compare)
@@ -44,3 +137,54 @@ class Bits:
     def __ge__(self, compare):
         return int(self) >= int(compare)
 
+    def __hash__(self):
+        return None
+
+    def __bool__(self):
+        return bool(int(self))
+
+    def __len__(self):
+        return len(self.__raw)
+
+    def __get__(self, instance, owner=None):
+        return self.__raw
+
+    def __str__(self):
+        return self.bin()
+
+    def int(self, _bytes=None, byteorder="big", signed=False):
+        if _bytes is None:
+            _bytes = bytes(self)
+        return int.from_bytes(bytes=_bytes, byteorder=byteorder,
+                              signed=signed)
+
+    def bin(self, i=None, pad=True):
+        if i is None:
+            i = self.int()
+        bitcount = i.bit_length()
+        ret = ""
+        if pad and ((bitcount % 8) > 0):
+            ret = "0" * (8 - (bitcount % 8))
+        chop = 2
+        if i < 0:
+            # account for the sign character
+            chop += 1
+        return ret + bin(i)[chop:]
+
+    @property
+    def bytes(self):
+        return bytes(self)
+
+    @property
+    def bytearray(self):
+        return bytearray(bytes(self))
+
+    def from_int(self, i, byteorder="big"):
+            signed = False
+            if i < 0:
+                signed = True
+            length = (len(self.bin(i=i, pad=True)) / 8)
+            return i.to_bytes(length=length,
+                              byteorder=byteorder,
+                              signed=signed)
+