requests.Response.iter_content

Response.iter_content(chunk_size=1, decode_unicode=False)

Iterates over the response data. When stream=True is set on the request, this avoids reading the content at once into memory for large responses. The chunk size is the number of bytes it should read into memory. This is not necessarily the length of each item returned as decoding can take place.

If decode_unicode is True, content will be decoded using the best available encoding based on the response.