Python3 GZip Compressing String

Question

I am trying to do the following with Python3:

data = json.dumps(packet)
s = StringIO()
g = gzip.GzipFile(fileobj=s, mode='w')
g.write(data)
g.close()
gzipped_body = s.getvalue()

But it keeps complaining with the following error:

TypeError: string argument expected, got 'bytes'

The example code I'm using is based on Python2 so I am thinking there is some changes in StringIO that might be causing this but I'm not sure. Anyone give me some hints on how to get a gzipped string of some JSON in Python3?

Gregg · Accepted Answer · 2014-09-02 21:27:56Z

19

Looks like this might have gotten a lot easier in Python3. This code seems to work so far:

data = bytes(json.dumps(packet), 'utf-8')
s_out = gzip.compress(data)

answered Sep 2, 2014 at 21:27

Gregg

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1 Comment

LayneSadler Over a year ago

bytes() is an easy way to convert StringIO()'s .getvalue() string to bytes! Then you can gzip it.

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