Add source files

src/streamlit_app.py

@@ -1,40 +1,119 @@
-import altair as alt
-import numpy as np
-import pandas as pd
+import os
+import requests
+from dotenv import load_dotenv
+import re
 import streamlit as st
+import pandas as pd
+from st_aggrid import AgGrid, GridOptionsBuilder
+from streamlit_echarts import st_echarts
+from streamlit_chat import message
+
+#absolute path to the folder
+BASE_DIR = os.path.dirname(os.path.abspath(__file__))
+
+# Load API key from .env file
+load_dotenv(dotenv_path=r"C:/Users/som/Desktop/Sharm/Study/Colleges/Duke/STudy/PYTHON/Assignments/my-local-repo/Week5/D2/Assignment/.gitignore/.env")
+API_KEY = os.getenv("OPENWEATHER_API_KEY")
+if not API_KEY:
+    st.error("❌ API Key not found! Make sure it's set in your .env file.")
+    st.stop()
+
+def get_weather(city):
+    # 1. Create the API endpoint URL
+    base_url = "https://api.openweathermap.org/data/2.5/weather"
+
+    # 2. Set query parameters
+    params = {
+        "q": city,
+        "appid": API_KEY,
+        "units": "metric"           # temperature in Celsius
+    }
+
+    # 3. Make the request
+    response = requests.get(base_url, params=params)
+    
+    if response.status_code == 200:     #checks whether API call was successful(200 is the standard code for "OK").
+        # 4. Parse JSON
+        data = response.json()
+
+        # 5. Extract key info
+        temp = data['main']['temp']
+        humidity = data['main']['humidity']
+        description = data['weather'][0]['description']
+        desc_lower = description.lower()
+        # Advice suggestion logic
+        if temp <= 10:
+            img_file = os.path.join(BASE_DIR, "images", "chill.jpg")
+            advice = "🧥 It's chilly — wear a jacket."
+        elif 10 < temp <= 20:
+            if "rain" in desc_lower:
+                img_file = os.path.join(BASE_DIR, "images", "shower.jpg")
+                advice = "🌧️ Showers expected — carry an umbrella."
+            else:
+                img_file = os.path.join(BASE_DIR, "images", "sun.jpg")
+                advice = "🧢 Mild day — a hat might be nice."
+        else:  # temp > 20
+            if "rain" in desc_lower:
+                img_file = os.path.join(BASE_DIR, "images", "RAIN.jpg")
+                advice = "☔ Warm but rainy — take an umbrella."
+            else:
+                img_file = os.path.join(BASE_DIR, "images", "cloudy.jpg")
+                advice = "😎 Warm and clear — enjoy the day!"
+        
+        # display image in col1, weather info in col2
+        col1, col2 = st.columns([1, 2])
+        with col1:
+            st.image(img_file, use_container_width=True)
+
+        with col2:
+
+        #Highlight keywords using regex and ANSI bold
+            st.markdown(f"""
+            ### 📍 Weather in **{city.capitalize()}**
+            - 🌡️ **Temperature:** {temp} °C  
+            - 💧 **Humidity:** {humidity}%  
+            - 📝 **Description:** {description.capitalize()}  
+            - 🔔 **Suggestion:** {advice}
+            """)
+    else:
+        st.error("❌ Could not retrieve weather data. Please check the city name.")
+
+
+def main():
+# 1. Title and description
+    st.title(" 🌍 Weather Information App")
+    st.markdown("---")
+    st.write("Fetch and Display the current weather for any city in the world. ")
+
+    with st.expander("ℹ️ About this app"):
+        st.write("The app uses the [OpenWeatherMap API](https://openweathermap.org/api) and gives practical suggestions based on the weather and temperature (e.g., bring a jacket or umbrella).")
+    st.markdown("---")
+    st.image("images/weather.jpg", use_container_width=True)
+    st.markdown("---")
+    with st.container():
+        st.subheader("UserName")
+        # Text input tied to session state key "username"
+        name = st.text_input("Enter your name", key="username")
+
+# Use the stored value elsewhere
+    if name:
+        
+            st.success(f"👋 Hello, {st.session_state.username}!")
+            st.markdown("---")
+            st.title(" Stay informed about the weather 🌦️ ")
+            st.write("*" *80)
+            
+            city = st.text_input("Enter the name of the city:")
+            city = re.sub(r"[^a-zA-Z\s]", "", city).strip()
+
+            if st.button("Get Weather"):
+                if city:
+                    get_weather(city)
+                            #with st.spinner("Fetching weather..."):
+            
+                else:
+                    st.error("❌ Please enter a city name before fetching weather.")
+
 
-"""
-# Welcome to Streamlit!
-
-Edit `/streamlit_app.py` to customize this app to your heart's desire :heart:.
-If you have any questions, checkout our [documentation](https://docs.streamlit.io) and [community
-forums](https://discuss.streamlit.io).
-
-In the meantime, below is an example of what you can do with just a few lines of code:
-"""
-
-num_points = st.slider("Number of points in spiral", 1, 10000, 1100)
-num_turns = st.slider("Number of turns in spiral", 1, 300, 31)
-
-indices = np.linspace(0, 1, num_points)
-theta = 2 * np.pi * num_turns * indices
-radius = indices
-
-x = radius * np.cos(theta)
-y = radius * np.sin(theta)
-
-df = pd.DataFrame({
-    "x": x,
-    "y": y,
-    "idx": indices,
-    "rand": np.random.randn(num_points),
-})
-
-st.altair_chart(alt.Chart(df, height=700, width=700)
-    .mark_point(filled=True)
-    .encode(
-        x=alt.X("x", axis=None),
-        y=alt.Y("y", axis=None),
-        color=alt.Color("idx", legend=None, scale=alt.Scale()),
-        size=alt.Size("rand", legend=None, scale=alt.Scale(range=[1, 150])),
-    ))
+if __name__ == "__main__":
+    main()