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Still very new to use this python module, zstd 0.8.1. I did a test run on the following, 

import zstd

cctx = zstd.ZstdCompressor()
zstd_data = cctx.compress(b'aaaaa')
len(zstd_data)
Out[34]: 14  #this is my output

However when i did, 

cobj = cctx.compressobj()
zstd_data = cobj.compress(b'aaaaa')
len(zstd_data)
Out[39]: 0  #why the length is 0?

What is my mistakes?

lsamarahan
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1 Answers1

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I know this has been a while, but figured I'd answer for anybody that sees this page on Google.

It looks like you're using the python-zstandard library (https://github.com/indygreg/python-zstandard/issues). It is important to note that in the examples, the last line for the ZstdCompressor object demos use zstd_data = cobj.flush(). After you add that line, it should work.

Or, if you prefer the simple API:

cctx = zstd.ZstdCompressor()
compressed = cctx.compress(b'data to compress')

Your second example did not include the flush() step, which is required for compressobj()

Eamonn Nugent
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