Create app.py

app.py

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+"""
+Pump Power Calculator (Streamlit)
+Suitable for quick hydraulic/shaft/motor power estimates for pumps.
+- Deploy: push these files to a GitHub repo and create a Streamlit app on Hugging Face Spaces / Streamlit Community Cloud.
+- Run locally: `pip install -r requirements.txt` then `streamlit run app.py`
+
+Author: Generated by ChatGPT
+"""
+
+import streamlit as st
+import math
+import io
+import csv
+
+st.set_page_config(page_title="Pump Power Calculator", layout="centered")
+
+st.title("Pump Power Calculator")
+st.markdown(
+    "Calculate hydraulic power, shaft power (accounting for pump efficiency), and a recommended motor power "
+    "including a service factor. Units supported for flow: m³/s, L/s, m³/h. Head in m or ft."
+)
+
+# -------------------------
+# Inputs
+# -------------------------
+st.header("Input parameters")
+
+col1, col2 = st.columns(2)
+
+with col1:
+    flow_value = st.number_input("Flow rate (value)", min_value=0.0, value=5.0, step=0.1, format="%.6f")
+    flow_unit = st.selectbox("Flow unit", ["L/s", "m³/s", "m³/h"], index=0)
+    density = st.number_input("Fluid density (kg/m³)", min_value=0.0, value=1000.0, step=1.0)
+
+with col2:
+    head_value = st.number_input("Head (value)", min_value=0.0, value=20.0, step=0.1, format="%.6f")
+    head_unit = st.selectbox("Head unit", ["m"]()_