Question

from flask import Flask, request, render_template
import numpy as np

app = Flask(__name__)

@app.route("/")
def home():
return render_template("home.html")

@app.route("/testnpv",methods=["POST"])
def my_npv():
    num1 = request.form["num1"]
    num2 = request.form["num2"]
    num3 = request.form["num3"]
    num4 = request.form["num4"]
    num5 = request.form["num5"]

npv = np.npv(.5,[float(num1),float(num2),float(num3),float(num4),float(num5)])
    return npv

这是html模板

<!DOCTYPE html>
<html>
<head>
<title> FinCalc</title>
<link
rel="stylesheet"
href=https://cdnjs.cloudflare.com/ajax/libs/skeleton/2.0.4/skeleton.min.css
/>
</head>
<body>
  <form action="/testnpv" method="POST">

  <input type="number"
  placeholder="Cash flow one"
  class="u-full-width"
  name="num1"/>

  <input type="number"
  placeholder="Cash flow two"
  class="u-full-width"
  name="num2"/>

  <input type="number"
  placeholder="Cash flow three"
  class="u-full-width"
  name="num3"/>

  <input type="number"
  placeholder="Cash flow four"
  class="u-full-width"
  name="num4"/>

  <input type="number"
  placeholder="Cash flow five"
  class="u-full-width"
  name="num5"/>

<label for="Npv">Npv</label>

<input type="submit" value="calculate" id="calc_btn"/>

我可以返回npv值，但在其他页面上。我希望它在与输入相同的页面上返回npv值。我尝试从my_npv（）返回html模板和npv，但收到此错误“ TypeError：render_template（）接受1个位置参数，但给出了2个位置”

python和flask的新手。感谢您的帮助！

如何在烧瓶中显示NPV功能？

0 个答案: