--- a/python/hexfile.py	Sun Jul 14 11:50:58 2013 +0200
+++ b/python/hexfile.py	Sun Jul 14 12:28:23 2013 +0200
@@ -1,34 +1,31 @@
 import os
 
 class HexFileException(Exception):
-   pass
+    pass
 
 def parseHexLine(line):
-   """ Parses a hexfile line into three parts """
-   line = line[1:] # Remove ':'
-   nums = bytes.fromhex(line)
-   bytecount = nums[0]
-   if len(nums) != bytecount + 5:
-      raise HexFileException('byte count field incorrect')
-   crc = sum(nums)
-   if (crc & 0xFF) != 0:
-      raise HexFileException('crc incorrect')
-   address = nums[1] * 256 + nums[2]
-   typ = nums[3]
-   data = nums[4:-1]
-   return (address, typ, data)
+    """ Parses a hexfile line into three parts """
+    line = line[1:] # Remove ':'
+    nums = bytes.fromhex(line)
+    bytecount = nums[0]
+    if len(nums) != bytecount + 5:
+        raise HexFileException('byte count field incorrect')
+    crc = sum(nums)
+    if (crc & 0xFF) != 0:
+        raise HexFileException('crc incorrect')
+    address = nums[1] * 256 + nums[2]
+    typ = nums[3]
+    data = nums[4:-1]
+    return (address, typ, data)
+
 
 class HexFile:
-   """ Represents an intel hexfile """
-   def __init__(self, filename=None):
+    """ Represents an intel hexfile """
+    def __init__(self, filename=None):
       self.regions = []
       self.startAddress = 0
-      self.filename = None
-      if filename:
-         self.load(filename)
 
-   def load(self, filename):
-      with open(filename, 'r') as f:
+    def load(self, f):
          endOfFile = False
          offset = 0
          startAddress = 0
@@ -66,21 +63,23 @@
          # After all lines:
          if curData:
             self.regions.append(HexFileRegion(startAddress, bytes(curData)))
-         # Store the filename:
-         self.filename = filename
-   def __repr__(self):
-      i = []
-      i.append(super().__repr__())
-      i.append('Start address {0}'.format(hex(self.startAddress)))
-      i.append('Filename: {0}'.format(self.filename))
-      for r in self.regions:
-         i.append(str(r))
-      return os.linesep.join(i)
-   def save(self, filename):
-      with open(filename, 'w') as f:
-         for line in f:
-            pass
-     
+
+    def __repr__(self):
+        i = []
+        i.append(super().__repr__())
+        i.append('Start address {0}'.format(hex(self.startAddress)))
+        for r in self.regions:
+            i.append(str(r))
+        return os.linesep.join(i)
+
+    def save(self, f):
+        for r in self.regions:
+            offset = 0
+            while offset < len(r.data):
+                f.write('a')
+                offset += 16
+
+
 class HexFileRegion:
    def __init__(self, address, data = bytes()):
       self.address = address
@@ -88,10 +87,13 @@
    def __repr__(self):
       return 'Region at 0x{0:X} of {1} bytes'.format(self.address, len(self.data))
 
+
 if __name__ == '__main__':
    h = HexFile()
    print(h)
    """ Test hexfile implementation with some hexfile """
-   h1 = HexFile('audio.hex')
+   h1 = HexFile()
+   with open('audio.hex', 'r') as f:
+        h1.load(f)
    print(h1)