How to find out if BytesIO is empty in Python

In order to find out if a BytesIO instance is empty or not, get its size and then check if it’s > 0:

my_bytesio.getbuffer().nbytes > 0

The following example shows how to use it in an if clause:

if my_bytesio.getbuffer().nbytes > 0:
    print("my_bytesio is empty")
else:
    print("my_bytesio is NOT empty")