How to write lines continuously without newlines into a st.code object

Using Streamlit
1

Hi,

I’m trying to write dynamic log output into a streamlit app.
The code does something like that atm:

for line in generator:
     st.code(line)

The output looks quite ugly (containing an empty line between the code blocks) e.g.:

line1

line2

line3

I know that above is not the way how to achieve it.
st.code will always generate a new code object. I would like to append lines to an
existing st.code object. The lines are coming dynamically in with delay. Hence I cannot
generate the code block first and write it at once.
Any idea how to accomplish it?

thx

2

Solution was quite easy:

block = ""
    for line in streamer.start():
            st.code(block)
            block = f"{block}\n{line}"

sorry for the noise

3

Problem with this code is that the “block” variable will be grow line by line and send with each incoming new line again. That leads to errors like:

Traceback (most recent call last):
  File "/data/git/progs/python/streaml_vmware/venv/lib64/python3.8/site-packages/tornado/websocket.py", line 1104, in wrapper
    raise WebSocketClosedError()
tornado.websocket.WebSocketClosedError

because to much data will be sent within to short time frames.
So I need a better solution where I can append strings to an already existing st.code object.

4

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