Python 访问request.POST时出现KeyError

我在python中发现了关键错误

像这样的错误

KeyError at /python_tutor/
'user_script'

代码是

import web_exec
def tutor(request):
    print "Inisde tutor", request.method
    print "POST =", request.POST
    if request.method == "POST" :
        print "Inside Post"
        print "My Script =", request.POST["user_script"]
        mycode = request.POST["user_script"]
        exec mycode 
    web_exec('mycode')

请为我提供解决方案？

这意味着字典中不存在密钥（

user\u script

）（

request.POST

）；这表明它没有被提交。尝试：

if 'user_script' in request.POST:
    print "My Script =", request.POST["user_script"]
    mycode = request.POST["user_script"]

---

mycode=request.POST.get（'user\u script'，None）

exec mycode

'instancemethod'对象不可订阅