'write(addr, data) -> None
In order to tell : I want to write ``data`` at ``addr``.
Arguments:
addr(int): the address where you want to write
data(int): the data that you want to write ``addr``
Returns:
None
Examples:
>>> def send_fmt_payload(payload):
...     print repr(payload)
>>> f = FmtStr(send_fmt_payload, offset=5)
>>> f.write(0x08040506, 0x1337babe)
>>> f.execute_writes()
\'\x06\x05\x04\x08\x07\x05\x04\x08\x08\x05\x04\x08\t\x05\x04\x08%174c%5$hhn%252c%6$hhn%125c%7$hhn%220c%8$hhn\''

def write(self, addr, data):

    self.writes[addr] = data
