Streamlit - 快速更新地图（folium / geopandas）

Question

我有这段代码，应该通过 Streamlit 快速更新坐标（纬度、经度和 GPS 定位状态）：

import socket
import struct
import time
import threading
import streamlit as st
import folium
from streamlit.runtime.scriptrunner import add_script_run_ctx
from streamlit_folium import st_folium

SERVER_ADDRESS = '127.0.0.1'
SERVER_PORT = 25567
LAT_LON_PRECISION = 8

STATUS_NO_FIX = -1  # unable to fix position
STATUS_FIX = 0  # unaugmented fix
STATUS_SBAS_FIX = 1  # with satellite-based augmentation
STATUS_GBAS_FIX = 2


@st.cache_resource
def getSharedData():
    return {
        'latitude': None,
        'longitude': None,
        'status': None
    }


def receiveData(shared_data):
    client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    client.bind((SERVER_ADDRESS, SERVER_PORT))
    while True:
        data, server_address = client.recvfrom(1024)
        unpacked_data = struct.unpack('ddi', data)
        latitude, longitude, status = unpacked_data

        shared_data['latitude'] = round(latitude, LAT_LON_PRECISION)
        shared_data['longitude'] = round(longitude, LAT_LON_PRECISION)
        shared_data['status'] = getStatusText(status)


@st.cache_resource
def updateData():
    receive_thread = threading.Thread(target=receiveData, args=(getSharedData(),))
    receive_thread.daemon = True
    add_script_run_ctx(receive_thread)
    receive_thread.start()


def getStatusText(status):
    if status == STATUS_NO_FIX:
        return "No Fix"
    elif status == STATUS_FIX:
        return "Fix"
    elif status == STATUS_SBAS_FIX:
        return "SBAS"
    elif status == STATUS_GBAS_FIX:
        return "GBAS"
    return "N/A"


def main():
    st.set_page_config(layout="wide")
    updateData()

    sharedData = getSharedData()

    lat_display = st.empty()
    lon_display = st.empty()
    status_display = st.empty()
    map_display = st.empty()
    
    m = folium.Map(zoom_start=12)

    while True:
        latitude = sharedData['latitude']
        longitude = sharedData['longitude']
        status = sharedData['status']
        if latitude is None or longitude is None:
            time.sleep(0.075)
            continue
        lat_display.text(f"Latitude: {latitude}")
        lon_display.text(f"Longitude: {longitude}")
        status_display.text(f"Status: {status}")

        folium.Marker([latitude, longitude], tooltip="Current Location").add_to(m)

        with map_display:
            st_folium(m)

        time.sleep(0.075)


if __name__ == "__main__":
    main()

我终于实现了跨多个客户端的数据共享/缓存。 我现在遇到的问题是我想渲染带有当前位置的地图（以及将来的更多内容）。但是当我执行 st_folium 调用（与 geopandas 和 st.map() 相同）时，它开始闪烁。如何快速更新地图？任何类型的地图，我都不必拘泥于大叶或地理熊猫。

Answer 1

同事的兄弟建议使用plotly_chart。就像魅力一样。