get a list of values from user in streamlit app

Question

I want to get a list of values from user, but I have no idea how to perform. I tried with code as follows but this is not the correct way.

import streamlit as st

collect_numbers = lambda x : [str(x)]

numbers = st.text_input("PLease enter numbers")

st.write(collect_numbers(numbers))

Answer 1

I'd suggest using a tuple, list or iterable. For example,

import streamlit as st  # 1.18.1

numbers = [st.number_input(f"Enter number {i}") for i in range(4)]
st.write(numbers)

Or text:

prompts = "Name", "Age", "Favorite animal", "Birth date", "Favorite color"
answers = [st.text_input(x) for x in prompts]

for prompt, answer in zip(prompts, answers):
    st.write(f"Your {prompt.lower()} is {answer}")

Or a mix:

prompts = "Name", "Age", "Favorite animal", "Birth date", "Favorite color"
inputs = (
    st.text_input,
    lambda p: st.number_input(p, value=0),
    st.text_input,
    st.date_input,
    st.color_picker
)
answers = [fn(p) for p, fn in zip(prompts, inputs)]

for prompt, answer in zip(prompts, answers):
    st.write(f"Your {prompt.lower()} is {answer}")

You could put this in a form if you want to handle a final submission after all inputs are filled:

prompts = {
    "Name": st.text_input,
    "Age": lambda p: st.number_input(p, value=0),
    "Favorite animal": st.text_input,
    "Birth date": st.date_input,
    "Favorite color": st.color_picker,
}

with st.form("info"):
    answers = [fn(p) for p, fn in prompts.items()]

    if st.form_submit_button("Submit"):
        if all(answers):
            for prompt, answer in zip(prompts, answers):
                st.write(f"Your {prompt.lower()} is {answer}")
        else:
            st.error("Please fill all fields")

Streamlit has pretty powerful form handling, so these can be extended much further, but I don't want to speculate too much on your use case.