Update app.py

app.py

@@ -236,7 +236,7 @@ def get_array_CF_PV():
 
 def get_array_NPV():
     array_NPV = [array_PV[0]]
-    for idx in range(1, Number_of_months + 1, 1):
+    for idx in range(1, len(array_NPV), 1):
         array_NPV.append(array_NPV[-1] + array_PV[idx])
     return array_NPV
     
@@ -273,4 +273,5 @@ if st.button('Расчет эффективности'):
     chart_data['PV'] = array_PV
     chart_data['NPV'] = array_NPV
 
-    st.bar_chart(chart_data)
+    st.bar_chart(chart_data)
+