Deploy a Streamlit app to Connect Cloud

Deploy a Streamlit app to Connect Cloud from GitHub, from Positron or VS Code with Posit Publisher, or with the rsconnect-python CLI.

Skip the guide and deploy the sample app

In this guide, you deploy a Streamlit app to Connect Cloud and get a URL you can share. You can deploy from GitHub, from Positron or VS Code, or from the command line. The sample app charts the share of income held by the richest 5% of the population in each country.

A Streamlit app with a country selector, a year slider, and a line chart of top 5% income share by country — The sample Streamlit app running locally

The source code is available in the examples-streamlit repository.

Getting started

Whichever method you choose, you need the following:

A Connect Cloud account.
A Streamlit app. This guide uses the sample app, which has a main file (Connect Cloud calls it the primary file) named app.py and a data.csv data file.
A requirements.txt file that lists the Python packages you use, in the same folder as app.py. The sample app needs the following packages:
```
requirements.txt
```
```
streamlit
pandas
altair
```

View the sample app code

Save this file as app.py.

app.py

import os.path

import altair as alt
import pandas as pd
import streamlit as st

HERE = os.path.dirname(os.path.abspath(__file__))

st.title("Top 5%" " income share")
st.markdown("Share of income received by the richest 5%" " of the population.")
DATA = os.path.join(HERE, "data.csv")


@st.cache_data
def load_data(nrows):
    return pd.read_csv("./data.csv", nrows=nrows)


data_load_state = st.text("Loading data...")
data = load_data(10000)
data_load_state.text("")

countries = st.multiselect(
    "Countries",
    list(sorted({d for d in data["Entity"]})),
    default=["Australia", "China", "Germany", "Japan", "United States"],
)
earliest_year = data["Year"].min()
latest_year = data["Year"].max()
min_year, max_year = st.slider(
    "Year Range",
    min_value=int(earliest_year),
    max_value=int(latest_year),
    value=[int(earliest_year), int(latest_year)],
)
filtered_data = data[data["Entity"].isin(countries)]
filtered_data = filtered_data[filtered_data["Year"] >= min_year]
filtered_data = filtered_data[filtered_data["Year"] <= max_year]

chart = (
    alt.Chart(filtered_data)
    .mark_line()
    .encode(
        x=alt.X("Year", axis=alt.Axis(format="d")),
        y=alt.Y("Percent", axis=alt.Axis(format="~s")),
        color="Entity",
        strokeDash="Entity",
    )
)
st.altair_chart(chart, use_container_width=True)

if st.checkbox("Show raw data"):
    st.subheader("Raw data")
    st.write(filtered_data)

st.markdown("Source: <https://ourworldindata.org/grapher/top-5-income-share>")

Get data.csv from the sample repository.

To preview the app before you deploy, install the dependencies and run it from the folder that contains app.py:

Terminal

pip install -r requirements.txt
streamlit run app.py

Choose a deployment method

Method	When to use it	Jump to
GitHub	Your code is on GitHub and you want it to update when you push (public repositories only on free accounts)	Deploy from GitHub
Posit Publisher	You work in Positron or VS Code and do not use GitHub	Deploy from Positron or VS Code
rsconnect-python	You want to deploy from a terminal or automate deployments	Deploy from the command line

For more on how these methods differ, see Publishing.

Deploy from GitHub

Use this method when your app’s code is in a GitHub repository and you want changes you push to publish automatically. On a free account, your repository must be public, so anyone can see your code.

Commit app.py and requirements.txt, then push your app to a GitHub repository.
Sign in to Connect Cloud.
Click Publish at the top of your Home page. If this is your first time publishing, Connect Cloud prompts you to install the GitHub App, which lets Connect Cloud read your repository.
Select Streamlit.
Select your repository.
Check that Branch is the branch that has your content, usually main.
Select app.py as the Primary file.
Leave Automatically publish on push on if you want Connect Cloud to update what you published each time you push to this branch. Turn it off to update only when you choose.
Click Publish.

Result: Connect Cloud shows a log of the install steps while it deploys. When it finishes, your app is live at an address like https://[content-id].share.connect.posit.cloud, where [content-id] is a unique identifier that Connect Cloud picks. You can set a custom name to change the URL.
Update or redeploy: Commit and push to the connected branch and Connect Cloud republishes automatically. If you turned off automatic publishing, click Republish on the content’s card on your Home page. See Republishing.

For all options, see Publish from GitHub.

Deploy from Positron or VS Code

Use this method when you work in Positron or VS Code and want to publish your app directly. Positron includes the Posit Publisher extension. In VS Code, install it from the marketplace first.

Open your project folder in Positron, or in VS Code with Posit Publisher installed.
Click the Posit Publisher icon in the Activity Bar.
Next to CREDENTIALS, click + and select Posit Connect Cloud. A credential is a saved connection to your Connect Cloud account. Your browser opens.
In your browser, check that the Authorize Access code matches the code in Positron or VS Code. Then click Continue and Authorize.
Return to Positron or VS Code and accept or change the name for this credential. Do this once.
Click the + next to Deployments. If Posit Publisher asks which file to publish, select app.py.
Enter a title for your content, then select the credential you just added.
Under PROJECT FILES, check that the list includes app.py, data.csv, and requirements.txt. Connect Cloud uploads only the files in this list.
Click Deploy Your Project.

Result: A success message appears in the lower right of Positron or VS Code. Click View Content in the extension to open the app on Connect Cloud. Its address has the form https://[content-id].share.connect.posit.cloud, where [content-id] is unique to your app.
Update or redeploy: Save your changes, open Posit Publisher, select the previous deployment, and click Deploy Your Project again. Keep the .posit folder in your project. It remembers which Connect Cloud content this project publishes to, so the next deploy updates the same content instead of creating a new one.

For the configuration file, multiple deployments per project, and troubleshooting, see Publish from your IDE.

Deploy from the command line

Use this method to deploy from a terminal or to automate deployments, for example, from a script. It requires rsconnect-python version 1.31.0 or higher.

Install the rsconnect-python command-line tool.
```
Terminal
```
```
pip install rsconnect-python
```
Add your Connect Cloud account. Replace <YOUR_ACCOUNT_HERE> with your account name from your account page. Your browser opens for you to authorize access.
```
Terminal
```
```
rsconnect add --connect-cloud \
  --account "<YOUR_ACCOUNT_HERE>" \
  --name cloud
```
Deploy the folder that contains app.py and requirements.txt.
```
Terminal
```
```
rsconnect deploy streamlit . --name cloud
```

Result: The command prints the URL of your content. Open the URL to see the content’s page on Connect Cloud. Add --quiet to print only the URL.
Update or redeploy: Run the same rsconnect deploy command again. The directory remembers where you deployed, so you can omit --name.

For noninteractive credentials, examples for automated builds, and other options, see Publish from your console or terminal.

After you deploy

Common things to set up next. They work the same however you deployed your app:

Passwords and API keys: Store them as secret variables, not in your code. Add them under Variables in content settings, or during publishing. Read them with os.getenv("NAME").
Access and sharing: Control who can view your app in Sharing.
Scheduling: On paid plans, schedule your app to republish at set times, for example, to refresh data each day.
Custom name and domain: Change the app’s URL with a custom name or a custom domain.
Upload size limit: The upload size limit applies when you upload your project files from your editor or the command line.

Troubleshooting

Missing package error: Add the package to requirements.txt and republish. Make sure the file is in the same directory as app.py.
Missing data file: Commit the file to the repository, or include it under PROJECT FILES in Posit Publisher. Connect Cloud can use only the files you deploy with the app.
st.secrets error: Connect Cloud does not support st.secrets. Store the value as a variable and read it with os.getenv.
Repository not listed: Confirm that the GitHub App has access to it.
The deploy command stops before uploading: The folder you are deploying needs a requirements.txt file. See Create a requirements.txt file.

If your deployment still fails, read the log that Connect Cloud shows while it deploys and look for the first error. You can also try Error Assist, which gives guidance based on your log output.