How to Deploy StreamlitApp?

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• Prerequisites

  • Requirements.txt file
  • Github account
  • Access to share.streamlit.io

• Detailed Procedure

  1. Run the command 'pip freeze > requirements.txt' (Traditional way - Not recommended due to other packages) Alternate(Recommended) way install the package a) pip install pipreqs b) open the command prompt and run pipreqs 'path of the python file' Eg:- pipreqs C:\projects\streamlit or 'pipreqs .\'

  2. Commit the app.py(code) files in to git hub repository. Refer the sample code in the Application section.

     • Application

       • Convert Image to Pencil Sketch Image
         

         # Image to Pencil sketch app
         import streamlit as st
         import numpy as np
         from PIL import Image
         import cv2                st.set_option('deprecation.showfileUploaderEncoding', False)
         def dodgeV2(x, y):
             return cv2.divide(x, 255 - y, scale=256)
         def pencilsketch(inp_img):
             img_gray = cv2.cvtColor(inp_img, cv2.COLOR_BGR2GRAY)
             img_invert = cv2.bitwise_not(img_gray)
             img_smoothing = cv2.GaussianBlur(img_invert, (21, 21),sigmaX=0, sigmaY=0)
             final_img = dodgeV2(img_gray, img_smoothing)
             return(final_img)
         
         st.title("PencilSketcher App")
         st.write("This Web App is to help convert your photos to realistic Pencil Sketches")
         
         file_image = st.sidebar.file_uploader("Upload your Photos", type=['jpeg','jpg','png'])
         
         if file_image is None:
             st.write("You haven't uploaded any image file")
         else:
             input_img = Image.open(file_image)
             final_sketch = pencilsketch(np.array(input_img))
             st.write("**Input Photo**")
             st.image(input_img, use_column_width=True)
             st.write("**Output Pencil Sketch**")
             st.image(final_sketch, use_column_width=True)
         

       • Simple App
         

         import streamlit as st
         def main():
                 st.title('App Deployment')
             st.subheader("Welcome to simple streamlit app")
             st.text("Simple example")
             st.balloons()
         
         if __name__ == '__main__':    
             main()
         

3.Login to https://share.streamlit.io/ and Select the github project and file location as shown in the steps below,
- Login to https://share.streamlit.io/ using github credentials and click on 'New app'
- Enter the github repository, branch and file name (app.py) and click on 'Deploy'

- Once deployment is successful it will generate the url **https://share.streamlit.io/githubuser/projectname/application.py or https://share.streamlit.io/[user name]/[repo name]**
- Click on 'vertical dots' or 'manageapp' to show the details of the application log.

• References https://docs.streamlit.io/en/stable/deploy_streamlit_app.html

• GitHub & Documentation Details

  • Source Code
  • Github url
  • Gitbook url
  • Notion url