Chart

Introducció

Streamlit supports several different charting libraries, and our goal is to continually add support for more. Right now, the most basic library is Matplotlib.

Then there are also interactive charting libraries like Vega Lite (2D charts) and deck.gl (maps and 3D charts).

And finally there a few chart types that are “native” to Streamlit, like st.line_chart and st.area_chart.

Comencem

Crea un projecte amb el nom streamlit-chart:

uv init streamlit-chart

API Reference

Matplotlib

uv add matplotlib

st.pyplot

Matplotlib doesn’t work well with threads.

So if you’re using Matplotlib you should wrap your code with locks.

This Matplotlib bug is more prominent when you deploy and share your apps because you’re more likely to get concurrent users then. The following example uses Rlock from the threading module.

Crea el fitxer pages/Matplotlib.py:

import matplotlib.pyplot as plt
import streamlit as st
from numpy.random import default_rng as rng
from threading import RLock

_lock = RLock()

arr = rng(0).normal(1, 1, size=100)

with _lock:
    fig, ax = plt.subplots()
    ax.hist(arr, bins=20)
    st.pyplot(fig)