streamlit-example/streamlit_app.py at master · 101010001a/streamlit-example · GitHub

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from collections import namedtuple

import altair as alt

import math

import pandas as pd

import streamlit as st

"""

# Welcome to Streamlit!

Edit `/streamlit_app.py` to customize this app to your heart's desire :heart:

If you have any questions, checkout our [documentation](https://docs.streamlit.io) and [community

forums](https://discuss.streamlit.io).

In the meantime, below is an example of what you can do with just a few lines of code:

"""

with st.echo(code_location='below'):

total_points = st.slider("Number of points in spiral", 1, 5000, 2000)

num_turns = st.slider("Number of turns in spiral", 1, 100, 9)

Point = namedtuple('Point', 'x y')

data = []

points_per_turn = total_points / num_turns

for curr_point_num in range(total_points):

curr_turn, i = divmod(curr_point_num, points_per_turn)

angle = (curr_turn + 1) * 2 * math.pi * i / points_per_turn

radius = curr_point_num / total_points

x = radius * math.cos(angle)

y = radius * math.sin(angle)

data.append(Point(x, y))

st.altair_chart(alt.Chart(pd.DataFrame(data), height=500, width=500)

.mark_circle(color='#0068c9', opacity=0.5)

.encode(x='x:Q', y='y:Q'))