basis_prices.py

import streamlit as st
import pandas as pd
import requests
import io
import plotly.express as px
from datetime import datetime
from datetime import date
def basis_page():
    st.title("Basis Prices")

    # GitHub repository information
    owner = "tbrost"  # Replace with your GitHub username or organization name
    repo = "ag-econ-data"  # Replace with your repository name
    file_path = "data/Basis_Data.csv"  # Replace with the path to your CSV file within the repo
    access_token = st.secrets["token"]  # Replace with your personal access token

    # Construct the raw file URL with the access token
    raw_url = f"https://raw.githubusercontent.com/{owner}/{repo}/main/{file_path}"
    headers = {"Authorization": f"token {access_token}"}

    # Make a GET request to the raw file URL
    response = requests.get(raw_url, headers=headers)
    df = pd.read_csv(io.StringIO(response.text))


    #st.download_button("Download Data", df)
    CITY = st.selectbox(
        'Select a City',
        ('Rexburg / Ririe','Idaho Falls','Blackfoot / Pocatello','Grace / Soda Springs','Burley / Rupert','Meridian',
    'Nezperce / Craigmont','Lewiston','Twin Falls / Buhl / Jerome / Wendell','Moscow / Genesee'))


    ATTRIBUTE = st.selectbox(
        'Select a Strain',
        ('Basis - Wheat (SWW)','Basis - Wheat (HRW)','Basis - Wheat (DNS)'))

    start_date = st.date_input("Start Date", date(2015, 12, 31))
    start_date = datetime(start_date.year, start_date.month, start_date.day)
    end_date = st.date_input("End Date")
    end_date = datetime(end_date.year, end_date.month, end_date.day)

    df['Date'] = pd.to_datetime(df['Date'], format='%Y-%m-%d')
    df['Date'] = df['Date'].dt.strftime("%Y/%d/%m")
    df['Date'] = pd.to_datetime(df['Date'], format='%Y/%d/%m')
    # Filter the DataFrame based on the selected date range
    df = df[(df['Date'] >= start_date) & (df['Date'] <= end_date)]

    df = df[['Location','year','week_of_year', 'Attribute','Value']]

    wheat_table=df.query('Attribute == @ATTRIBUTE & Location == @CITY')
    wheat_table = wheat_table.groupby(['Location','year', 'week_of_year', 'Attribute'])['Value'].mean().reset_index()

    df_pivot = wheat_table.pivot(index=['Attribute','week_of_year', 'Location'], columns=['year'], values='Value')
    df_pivot['Average'] = df_pivot.mean(axis=1)
    df_pivot['Median'] = df_pivot.median(axis=1)
    df_pivot['Max'] = df_pivot.max(axis=1)
    df_pivot['Min'] = df_pivot.min(axis=1)
    df_pivot['Standard Deviation'] = df_pivot.std(axis=1)

    df_pivot = df_pivot.reset_index(names=['Attribute', 'week of year', 'Location'])
    st.dataframe(df_pivot)

    filename= f'{ATTRIBUTE}_{CITY}_data.csv'
    def convert_df(df):
        # IMPORTANT: Cache the conversion to prevent computation on every rerun
        return df.to_csv().encode('utf-8')
    csv = convert_df(df_pivot)
    st.download_button(
    label="Download data as CSV",
    data=csv,
    file_name=filename,
    mime='text/csv',
)
    # Allow users to select summary columns for the line chart
    selected_columns = st.multiselect(
        'Select summary columns for the line chart',
        ['Average', 'Median', 'Max', 'Min', 'Standard Deviation'],
        ['Median', 'Max', 'Min']
    )

    # Create a Plotly line chart
    fig = px.line(df_pivot, x='week of year', y=selected_columns, title='Value Summaries by week of the year:')
    st.plotly_chart(fig)

    st.subheader('Annual Summary')
    
    # List of columns to exclude from summarization
    exclude_columns = ['Location', 'Attribute','week of year','Average','Median','Max','Min','Standard Deviation']

    # Identify columns to summarize (exclude the excluded columns)
    columns_to_summarize = [col for col in df_pivot.columns if col not in exclude_columns]


    # Summarize selected columns and save to another DataFrame
    summary_df = pd.DataFrame({
        'Mean': df_pivot[columns_to_summarize].mean(),
        'Min': df_pivot[columns_to_summarize].min(),
        'Max': df_pivot[columns_to_summarize].max()
    })
    # Reshape the DataFrame
    summary_df = summary_df.reset_index(names=['year', 'Mean', 'Min', 'Max'])
    fig2 = px.line(summary_df, x='year', y=['Mean', 'Max', 'Min'], title='Summary values over years (not adjusted for inflation):')
    summary_df.set_index('year', inplace=True)
    # Transpose (T) the DataFrame and reset the index
    reshaped_df = summary_df.T
    st.dataframe(reshaped_df)
    st.plotly_chart(fig2)