Create app.py

app.py

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+import streamlit as st
+import numpy as np
+import matplotlib.pyplot as plt
+
+
+# Streamlit app layout
+
+st.title("Savings account interest 💼")
+
+def calcular_cashflow(n, A, r, Pi):
+    cashflow = []
+    saldo = Pi
+    for i in range(n):
+        interes = saldo * (r/100)
+        abono_capital = A - interes
+        saldo += abono_capital
+        cashflow.append(saldo)
+    return cashflow
+
+def graficar_cashflow(cashflow):
+    meses = range(1, len(cashflow) + 1)
+    fig, ax = plt.subplots()
+    ax.plot(meses, cashflow, marker='o', linestyle='-')
+    ax.set_title('Cashflow por Mensualidad')
+    ax.set_xlabel('Mes')
+    ax.set_ylabel('Saldo')
+    ax.grid(True)
+    return fig, ax
+
+def main():
+    
+    n = st.number_input("Ingrese el número de mensualidades:", min_value=1, step=1, format='%d')
+    A = st.number_input("Ingrese el monto de la mensualidad:", min_value=0.0, step=1.0, format='%f')
+    r = st.number_input("Ingrese la tasa de interés (%):", min_value=0.0, step=0.01, format='%f')
+    Pi = st.number_input("Ingrese el depósito inicial:", min_value=0.0, step=1.0, format='%f')
+
+    if st.button('Calcular y Graficar Cashflow'):
+        cashflow = calcular_cashflow(int(n), float(A), float(r), float(Pi))
+        fig, ax = graficar_cashflow(cashflow)
+        st.pyplot(fig)
+
+if _name_ == "_main_":
+    main()