Star History but in Python with Streamlit + ghapi + Plotly Express

st_ghapi_starhistory.py

import pandas as pd
import plotly.express as px
import streamlit as st

from ghapi.all import GhApi
from ghapi.all import pages


@st.experimental_singleton
def load_ghapi() -> GhApi:
    return GhApi(token = st.secrets["github"]["key"])

@st.experimental_memo
def check_repo(repo):
    try:
        username, repository = repo.split("/")
        load_ghapi().activity.list_stargazers_for_repo(username, repository)
        return True
    except Exception:
        return False


@st.experimental_memo
def search_stargazers(repo, per_page=30):
    api = load_ghapi()

    username, repository = repo.split("/")
    api.activity.list_stargazers_for_repo(username, repository, per_page=per_page)
    n_pages = api.last_page()

    all_pages = pages(api.activity.list_stargazers_for_repo, n_pages, username, repository, per_page=per_page, headers={"Accept": "application/vnd.github.v3.star+json"})
    
    data = [{"date": item["starred_at"], "count": 1} for page in all_pages for item in page]
    df = pd.DataFrame(data)
    df["date"] = pd.to_datetime(df["date"])
    df = df.resample('W-Mon', on='date').sum().cumsum()
    df["repo"] = repo
    return df


st.title("Streamlit star-history")

st.sidebar.header("Configuraton")
all_repos = st.sidebar.text_area("Enter list of repos as username/repository")

if all_repos == "":
    st.warning("Enter repository info")
    st.stop()

for repo in all_repos.splitlines():
    if not check_repo(repo):
        st.warning(f"Repo {repo} does not seem to exist")
        st.stop()

df = pd.concat([search_stargazers(repo) for repo in all_repos.rstrip().splitlines()])
fig = px.line(df, x=df.index, y="count", color="repo")
fig.update_layout(hovermode="x")
st.plotly_chart(fig)