Handling data from Python socket recv

Question

I'm using Python 2.7 sockets to receive data:

data = self.socket.recv(4096)

How do I go about retrieving the first unsigned short from the data? The data looks like this:

>>> print repr(data) 
'\x00\x053B2D4C24\x00\x00\x01\x00...'

Santa · Accepted Answer · 2011-03-27 21:44:05Z

1

If by unsigned short you mean two bytes, just do:

data[:2]

If you know and expect a certain chunk size of data to parse, you can use the struct library.

answered Mar 27, 2011 at 21:44

Santa

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1 Comment

Yea that's the obvious answer. There might be a more elegant way of doing it but for now I'm going with a variation of what you have.

dpham · Accepted Answer · 2011-03-30 04:52:10Z

0

This is what I came up with:

s = struct.Struct('H')
num = int('0x' + ''.join(x for x in repr(packet[:s.size]) if x.isdigit()), 0)

answered Mar 27, 2011 at 22:56

dpham

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sqwerty · Accepted Answer · 2011-12-10 06:47:25Z

0

Old question but thought I'd post a better solution anyway:

value, = struct.unpack('H', data[:2])

Note the , usage in order to correctly unpack the 1-tuple that is returned.

answered Dec 10, 2011 at 6:47

sqwerty

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