Reads torrent files

torrent.py

def is_number(s):
    try:
        int(s)
        return True
    except ValueError:
        return False
    
    
class TorrentReader():
    def __init__(self, filePath):
        self.data = open(filePath, "rb").read()
        self.position = 0
        self.type = ''

    def peekChar(self):
        return chr(self.data[self.position])
    
    def readChar(self):
        c = self.peekChar()
        self.position += 1
        return c
        
    def readToChar(self, c):
        endx = self.data[self.position:].index(bytes(c, "utf-8"))
        return self.readBytes(endx + 1)[:-1]
    
    def readBytes(self, count):
        val = self.data[self.position:self.position+count].decode("ISO-8859-1")
        self.position += count
        return val

    def readByteString(self):
        if is_number(self.peekChar()):
            length = int(self.readToChar(':'))
            value = self.readBytes(length)
            return value
        else:
            return False

    def readKeyValue(self):
        key = self.readByteString()
        value = self.read()
        return key, value
        
    def read(self):
        t = self.peekChar()

        if t == 'd':
            d = dict()

            self.readChar()
            while not self.peekChar() == 'e':
                k, v = self.readKeyValue()
                d[k] = v
                
            self.readChar()
            return d
        elif t == 'l':
            d = list()

            self.readChar()
            while not self.peekChar() == 'e':
                v = self.read()
                d.append(v)
                
            self.readChar()
            return d
        elif t == 'i':
            self.readChar()
            return int(self.readToChar('e'))
        elif is_number(t):
            return self.readByteString()
        else:
            return False