ZimBlob must keep a reference on the content.

[mgautierfr]

See #3 (comment)

[jdcaballerov]

I added this commit 9068761

Do you think it's still not enough to avoid gc ?

[mgautierfr]

You added a reference to ZimBlob in the article.
But you also need to keep a reference to the content itself in the ZimBlob.

[jdcaballerov]

Do you agree ?

cdef class ZimBlob:
    cdef Blob* c_blob
    cdef object ref_content
    
    def __cinit__(self, content):

        if isinstance(content, str):
            self.ref_content = content.encode('UTF-8')
        else:
            self.ref_content = content

        self.c_blob = new Blob(<char *> self.ref_content, len(self.ref_content))

    def __dealloc__(self):
        if self.c_blob != NULL:
            del self.c_blob

Or should I retain only the address of that content. If the content is encoded I guess a copy will be made.

[mgautierfr]

Or should I retain only the address of that content. If the content is encoded I guess a copy will be made.

What need to be done in incrementing the reference on ref_content to be sure that gc will not delete it.
"Storing" ref_content in self is incrementing the reference. (Without copy, you are making a new reference).

But it is fix with my commit dee124f of the PR #22
(The same way of your commit 1133c84 but not merged because on branch cython-blend)