编解码器无法解码字节 0x89 Python

Question

So I'm trying to integrate the raw image into my insert statement in Python

with open(filename, "rb") as imageFile:
    im = open(filename, encoding="UTF-8")

    state = "INSERT INTO T_DOCUMENT (BINCONTENT, DOCNAME) VALUES (" + im.read() + ", '.png')"
    repo.Execute(state)

This is just my current code. I tried various things I found (also searched on stack overflow) but I can't seem to find it. I need to insert like the raw png file into the DB. I'm using Python 3.8

Answer 1

In the second line, you're trying to reopen a file you already have opened (as the variable imageFile ), and you're trying to read it as UTF-8-encoded text instead of as a binary. Not surprisingly, the decoder hit a byte in your image that isn't valid UTF-8.

I think what you want is to delete the second line and then use imageFile.read() instead of im.read() . However, without knowing exactly what kind of database interface you're using, I would bet that this still won't work, because you're appending a bytes object to a str , and constructing a SQL statement with string operations is usually a bad idea . Use your interface's facility for parametric statements instead.