如何在 streamlit 上创建独立工作的选项卡

Question

I'm trying to create tabs that works independently on Streamlit.

The official documentation explains here how to create three tabs for eg. and it works fine. But when I change the code of (let's say the Cat's tab) so can an error be raised, I can't anymore switch to Dog's tab or Owl's tab.

CODE:

import streamlit as st

tab1, tab2, tab3 = st.tabs(["Cat", "Dog", "Owl"])

with tab1:
    st.header("A cat")
    st.image("_", width=200) # I changed here on purpose to raise an error

with tab2:
    st.header("A dog")
    st.image("https://static.streamlit.io/examples/dog.jpg", width=200)

with tab3:
    st.header("An owl")
    st.image("https://static.streamlit.io/examples/owl.jpg", width=200)

ERROR:

FileNotFoundError: [Errno 2] No such file or directory: '_'

Do you have any solution to fix that?

Answer 1

You can handle that by using try: and except: then write error message after the exception E,g: st.error("No file found") or st.text("No file found")

import streamlit as st

tab1, tab2, tab3 = st.tabs(["Cat", "Dog", "Owl"])

with tab1:
    st.header("A cat")
    try:
        st.image("_", width=200) # I changed here on purpose to raise an error
    except FileNotFoundError:
        st.text("File not found")

with tab2:
    st.header("A dog")
    try:
        st.image("https://static.streamlit.io/examples/dog.jpg", width=200)
    except FileNotFoundError:
        st.text("File not found")

with tab3:
    st.header("An owl")
    try:
        st.image("https://static.streamlit.io/examples/owl.jpg", width=200)
    except FileNotFoundError:
        st.text("File not found")

You can do same with functions that proves individual operations, since you said your first tab1 holds large data

import streamlit as st

tab1, tab2, tab3 = st.tabs(["Cat", "Dog", "Owl"])

def compute_tab1():
    st.header("A cat")
    try:
        st.image("_", width=200) # I changed here on purpose to raise an error
    except FileNotFoundError:
        st.text("File not found")


def compute_tab2():
    st.header("A dog")
    try:
        st.image("https://static.streamlit.io/examples/dog.jpg", width=200)
    except FileNotFoundError:
        st.text("File not found")

def compute_tab3():
    st.header("An owl")
    try:
        st.image("https://static.streamlit.io/examples/owl.jpg", width=200)
    except FileNotFoundError:
        st.text("File not found")

with tab1:
    compute_tab1()

with tab2:
    compute_tab2()

with tab3:
    compute_tab3()