フラスコPythonの電卓500内部サーバーエラー

Question

これは私のコードです：私はPythonの予測計算のWebアプリを作るしようとしている

#!/usr/bin/env python 
from flask import Flask, request 

# create app 
app = Flask(__name__) 


def calculate(r,t,l): 
    return ((l+t)/2)*3 


def forecast(rem, sold1, sold2): 


    if (rem == 0 and sold1 == 0 and sold2 ==0): #All ZERO 
     result = 15 
    elif (rem == 0 and sold1 == 0 and sold2 < 10): #ALL FOR ONE PRODUCT VALUE 
     result = sold2*3 
    elif (rem == 0 and sold1 < 10 and sold2 ==0): 
     result = sold1*3 
    elif (rem < 10 and sold1 == 0 and sold2 == 0): 
     result = rem*3 
    #END FOR ONE PRODUCT VALUE 
    elif (rem>= 10 and sold1>=10 and sold2>=10): 

      if((rem/3)>=(sold1+10) or (rem/3)>=(sold1+10)): 
       result = 0 
      else: 
       result = calculate(rem,sold1,sold2)-rem 
    elif (rem<10 and sold1<10 and sold2<10): 
     result = calculate(rem,sold1,sold2) 
    elif (rem == 0 and sold1>=10 and sold2>=10): 
     result = calculate(rem,sold1,sold2) 
    else: 
     result = sold1 



    print ("\n\nSuggested stock purchase: ") 


    return result 


@app.route('/', methods=['GET', 'POST']) 
def index(): 
    if request.method == 'GET': 
     # show html form 
     return ''' 
      <form method="post"> 
       <input type="text" name="remaining" /> 
       <input type="text" name="sold1" /> 
       <input type="text" name="sold2" /> 

       <input type="submit" value="forecast" /> 
      </form> 
     ''' 
    elif request.method == 'POST': 
     # calculate result 
     rem = request.form.get('remaining') 
     sold1 = request.form.get('sold1') 
     sold2 = request.form.get('sold2') 

     result = forecast(rem,sold1,sold2) 
     return 'result: %s' % result 

。私はエラーを見つけることができません。私は単純な "eval"関数でこれを作ろうとしましたが、うまくいきました。しかし、受け取った入力を計算するために自分の関数を作成すると、エラーが発生します。これをどうやって解決するのですか？

トレースバック：

2017-03-22 06:20:59,184 :[2017-03-22 06:20:59,182] ERROR in app: Exception on/[POST] 

2017-03-22 06:20:59,186 :Traceback (most recent call last): 
2017-03-22 06:20:59,186 : File "/home/Firiyuu77/.virtualenvs/my-virtualenv/local/lib/python2.7/site-packages/flask/app.py", line 1982, in wsgi_app 
2017-03-22 06:20:59,186 : response = self.full_dispatch_request() 
2017-03-22 06:20:59,187 : File "/home/Firiyuu77/.virtualenvs/my-virtualenv/local/lib/python2.7/site-packages/flask/app.py", line 1614, in full_dispatch_request 
2017-03-22 06:20:59,187 : rv = self.handle_user_exception(e) 
2017-03-22 06:20:59,187 : File "/home/Firiyuu77/.virtualenvs/my-virtualenv/local/lib/python2.7/site-packages/flask/app.py", line 1517, in handle_user_exception 
2017-03-22 06:20:59,187 : reraise(exc_type, exc_value, tb) 
2017-03-22 06:20:59,188 : File "/home/Firiyuu77/.virtualenvs/my-virtualenv/local/lib/python2.7/site-packages/flask/app.py", line 1612, in full_dispatch_request 
2017-03-22 06:20:59,188 : rv = self.dispatch_request() 
2017-03-22 06:20:59,188 : File "/home/Firiyuu77/.virtualenvs/my-virtualenv/local/lib/python2.7/site-packages/flask/app.py", line 1598, in dispatch_request 
2017-03-22 06:20:59,188 : return self.view_functions[rule.endpoint](**req.view_args) 
2017-03-22 06:20:59,188 : File "/home/Firiyuu77/mysite/flask_app.py", line 64, in index 
2017-03-22 06:20:59,188 : result = forecast(rem,sold1,sold2) 
2017-03-22 06:20:59,188 : File "/home/Firiyuu77/mysite/flask_app.py", line 26, in forecast 
2017-03-22 06:20:59,189 : if((rem/3)>=(sold1+10) or (rem/3)>=(sold1+10)): 
2017-03-22 06:20:59,189 :TypeError: unsupported operand type(s) for /: 'unicode' and 'int' 

Answer 1

：これで rem = request.form.get('remaining')

：あなたがする必要があるすべては、この行を置き換えることですintただし、unicodeの場合は、intのようなタイプにキャストしてからforecast：

に渡すことができます

result = forecast(int(rem),int(sold1),int(sold2)) 

Answer 2

問題は、フラスコがあなたにrem VARためstrを与えることです。あなたは、フォームから得たデータ型ではありません

rem = int(request.form.get('remaining'))

あなたは他のVARSのためにこれを行うすぎ

Answer 3

rem = request.form.get('remaining')

文字列ではなく、int型です。

あなたは

rem = int(request.form.get('remaining'))