Read file using bit

ReadFileUsingBit.py

import array

class ReadFileUsingBit:
    def __init__(self):
        
        fileName = "file.txt"
        
        buffer = ""
        for b in self.readBitByBit(open(fileName, 'r')):
            buffer += str(b)
        
        tmpBuf = ""
        dataBit = array.array('B')
        for b in buffer:
            tmpBuf += str(b)
            if len(tmpBuf) == 8:
                dataBit.append(int(tmpBuf[::-1], 2))
                tmpBuf = ""
        
        f = file('fileCopy.txt', 'wb')
        dataBit.tofile(f)
        f.close()
        
        
    def readBitByBit(self, f):
        for b in (ord(b) for b in f.read()):
            for i in xrange(8):
                yield (b >> i) & 1
    

if __name__ == "__main__":
    readFileBitByBit = ReadFileUsingBit()