streamlit_app.py

import numpy as np
import altair as alt
import pandas as pd
import streamlit as st
from datetime import time, datetime
import time as tm
import os
from io import StringIO

# st.set_page_config(layout="wide")

# Day 2
st.header("Day 2: Hello, World!")

# Day 3
st.header('Day 3: st.button')

if st.button('Say hello'):
     st.write('Why hello there')
else:
     st.write('Goodbye')


# Day 5

st.header('Day 5: st.write')

# Example 1

st.write('Hello, *World!* :sunglasses:')

# Example 2

st.write(1234)

# Example 3

df = pd.DataFrame({
     'first column': [1, 2, 3, 4],
     'second column': [10, 20, 30, 40]
     })
st.write(df)

# Example 4

st.write('Below is a DataFrame:', df, 'Above is a dataframe.')

# Example 5

df2 = pd.DataFrame(
     np.random.randn(200, 3),
     columns=['x', 'y', 'z'])
st.write('This is the dataframe for graph', df2)
c = alt.Chart(df2).mark_circle().encode(
     x='x', y='y', size='z', color='z', tooltip=['x', 'y', 'z'])
st.write(c)


# Day 8
st.header('Day 8: st.slider')

# Example 1
st.subheader('slider')
age = st.slider('How old are you?', 0, 100, 20)
st.write("I'm ", age, 'years old')

# Example 2

st.subheader('Range slider')

values = st.slider(
     'Select a range of values',
     0.0, 100.0, (25.0, 75.0))
st.write('Values:', values)

# Example 3

st.subheader('Range time slider')

appointment = st.slider(
     "Schedule your appointment:",
     value=(time(10, 00), time(10, 30)))
st.write("You're scheduled for:", appointment)

# Example 4

st.subheader('Datetime slider')

start_time = st.slider(
     "When do you start?",
     value=datetime(2020, 1, 1, 9, 30),
     format="YYYY/MM/DD - hh:mm")
st.write("Start time:", start_time)


# Example 5
st.subheader('Color slider')

color = st.select_slider(
    'Select a color of the rainbow',
    options=['red', 'orange', 'yellow', 'green', 'blue', 'indigo', 'violet'])
st.write('My favorite color is', color)

start_color, end_color = st.select_slider(
    'Select a range of color wavelength',
    options=['red', 'orange', 'yellow', 'green', 'blue', 'indigo', 'violet'],
    value=('red', 'blue'))
st.write('You selected wavelengths between', start_color, 'and', end_color)


st.header('Day 9: Line chart')

chart_data = pd.DataFrame(
     np.random.randn(20, 3),
     columns=['a', 'b', 'c'])

st.line_chart(chart_data)


st.header('Day 10: st.selectbox')

option = st.selectbox(
     'What is your favorite color?',
     ('Blue', 'Red', 'Green'))

st.write('Your favorite color is ', option)

st.header('Day 11: st.multiselect')

options = st.multiselect(
     'What are your favorite colors',
     ['Green', 'Yellow', 'Red', 'Blue'],
     ['Yellow', 'Red'])

st.write('You selected:', options)

st.header('Day 12: st.checkbox')

st.write ('What would you like to order?')

icecream = st.checkbox('Ice cream')
coffee = st.checkbox('Coffee')
cola = st.checkbox('Cola')

if icecream:
     st.write("Great! Here's some more 🍦")

if coffee: 
     st.write("Okay, here's some coffee ☕")

if cola:
     st.write("Here you go 🥤")


# import pandas_profiling
# from streamlit_pandas_profiling import st_profile_report

# st.header('Day 14: `streamlit_pandas_profiling`')

# df = pd.read_csv('https://raw.githubusercontent.com/dataprofessor/data/master/penguins_cleaned.csv')

# pr = df.profile_report()
# st_profile_report(pr)
     

st.header('Day 15: st.latex')

st.latex(r'''
     a + ar + a r^2 + a r^3 + \cdots + a r^{n-1} =
     \sum_{k=0}^{n-1} ar^k =
     a \left(\frac{1-r^{n}}{1-r}\right)
     ''')

st.title('Day 16: Customizing the theme of Streamlit apps')

st.write('Contents of the `.streamlit/config.toml` file of this app')

st.code("""
[theme]
primaryColor="#FE9C12"
backgroundColor="#000000"
secondaryBackgroundColor="#6E6EFE"
textColor="#FFFFFF"
font="monospace"
""")

number = st.sidebar.slider('Select a number:', 0, 10, 5)
st.write('Selected number from slider widget is:', number)

st.title('Day17: st.secrets')

st.write('This is my secret gitHub username:', st.secrets['GitHub_username'])

# st.write(
# 	"Has environment variables been set:",
# 	os.environ["gitHub_username"] == st.secrets["gitHub_username"], 
#      )

st.title('Day18: st.file_uploader')

st.subheader('Input CSV')

uploaded_files = st.file_uploader("Choose a file", accept_multiple_files=True)
for uploaded_file in uploaded_files:
     if uploaded_file is not None:
          df = pd.read_csv(uploaded_file)
          st.subheader('DataFrame')
          st.write(df)
          st.subheader('Descriptive Statistics')
          st.write(df.describe())
     else:
          st.info('☝️ Upload a CSV file')

# uploaded_file = st.file_uploader("Choose a file")
# if uploaded_file is not None:
#     # To read file as bytes:
#     bytes_data = uploaded_file.getvalue()
#     st.write(bytes_data)

#     # To convert to a string based IO:
#     stringio = StringIO(uploaded_file.getvalue().decode("utf-8"))
#     st.write(stringio)

#     # To read file as string:
#     string_data = stringio.read()
#     st.write(string_data)

#     # Can be used wherever a "file-like" object is accepted:
#     dataframe = pd.read_csv(uploaded_file)
#     st.write(dataframe)

# uploaded_files = st.file_uploader("Choose a CSV file", accept_multiple_files=True)
# for uploaded_file in uploaded_files:
#     bytes_data = uploaded_file.read()
#     st.write("filename:", uploaded_file.name)
#     st.write(bytes_data)

st.title('Day 19: How to layout your Streamlit app')

with st.expander('About this app'):
  st.write('This app shows the various ways on how you can layout your Streamlit app.')
  st.image('https://streamlit.io/images/brand/streamlit-logo-secondary-colormark-darktext.png', width=250)

st.sidebar.header('Input')
user_name = st.sidebar.text_input('What is your name?')
user_emoji = st.sidebar.selectbox('Choose an emoji', ['', '😄', '😆', '😊', '😍', '😴', '😕', '😱'])
user_food = st.sidebar.selectbox('What is your favorite food?', ['', 'Tom Yum Kung', 'Burrito', 'Lasagna', 'Hamburger', 'Pizza'])

st.header('Output')

col1, col2, col3 = st.columns(3)

with col1:
  if user_name != '':
    st.write(f'👋 Hello {user_name}!')
  else:
    st.write('👈  Please enter your **name**!')

with col2:
  if user_emoji != '':
    st.write(f'{user_emoji} is your favorite **emoji**!')
  else:
    st.write('👈 Please choose an **emoji**!')

with col3:
  if user_food != '':
    st.write(f'🍴 **{user_food}** is your favorite **food**!')
  else:
    st.write('👈 Please choose your favorite **food**!')


st.title('Day 21: st.progress')

with st.expander('About this app'):
     st.write('You can now display the progress of your calculations in a Streamlit app with the `st.progress` command.')

progress_text = "Operation in progress. Please wait."
my_bar = st.progress(0, text=progress_text)

for percent_complete in range(100):
    tm.sleep(0.01)
    my_bar.progress(percent_complete + 1, text=progress_text)
tm.sleep(1)
my_bar.empty()
st.balloons()

st.button("Rerun")


st.title('Day 22: st.form')

# Full example of using the with notation
st.header('1. Example of using `with` notation')
st.subheader('Coffee machine')

with st.form('my_form'):
    st.subheader('**Order your coffee**')

    # Input widgets
    coffee_bean_val = st.selectbox('Coffee bean', ['Arabica', 'Robusta'])
    coffee_roast_val = st.selectbox('Coffee roast', ['Light', 'Medium', 'Dark'])
    brewing_val = st.selectbox('Brewing method', ['Aeropress', 'Drip', 'French press', 'Moka pot', 'Siphon'])
    serving_type_val = st.selectbox('Serving format', ['Hot', 'Iced', 'Frappe'])
    milk_val = st.select_slider('Milk intensity', ['None', 'Low', 'Medium', 'High'])
    owncup_val = st.checkbox('Bring own cup')

    # Every form must have a submit button
    submitted = st.form_submit_button('Submit')

if submitted:
    st.markdown(f'''
        ☕ You have ordered:
        - Coffee bean: `{coffee_bean_val}`
        - Coffee roast: `{coffee_roast_val}`
        - Brewing: `{brewing_val}`
        - Serving type: `{serving_type_val}`
        - Milk: `{milk_val}`
        - Bring own cup: `{owncup_val}`
        ''')
else:
    st.write('☝️ Place your order!')


# Short example of using an object notation
st.header('2. Example of object notation')

form = st.form('my_form_2')
selected_val = form.slider('Select a value')
form.form_submit_button('Submit')

st.write('Selected value: ', selected_val)


# st.title('Day 23: st.experimental_get_query_params')

# with st.expander('About this app'):
#   st.write("`st.experimental_get_query_params` allows the retrieval of query parameters directly from the URL of the user's browser.")

# # 1. Instructions
# st.header('1. Instructions')
# st.markdown('''
# In the above URL bar of your internet browser, append the following:
# `?firstname=Jack&surname=Beanstalk`
# after the base URL `http://share.streamlit.io/dataprofessor/st.experimental_get_query_params/`
# such that it becomes 
# `http://share.streamlit.io/dataprofessor/st.experimental_get_query_params/?firstname=Jack&surname=Beanstalk`
# ''')


# # 2. Contents of st.experimental_get_query_params
# st.header('2. Contents of st.experimental_get_query_params')
# st.write(st.experimental_get_query_params())


# # 3. Retrieving and displaying information from the URL
# st.header('3. Retrieving and displaying information from the URL')

# firstname = st.experimental_get_query_params()['firstname'][0]
# surname = st.experimental_get_query_params()['surname'][0]

# st.write(f'Hello **{firstname} {surname}**, how are you?')