How to Deploy StreamlitApp?

#streamlitdeployment #streamlit #pipreqs #gitbook

Prerequisites
- Requirements.txt file
- Github account
- Access to share.streamlit.io

Detailed Procedure

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 .\'

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.