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When I'm trying to call my function from my class this error raised. This is my class:

class Tools:
    def PrintException(self):
        # Do something
        return 'ok'

View.py:

from tools import Tools

def err(request):
    a = 10
    b = 0
    msg = ""
    try:
        print a / b
    except Exception,ex:
        c = Tools
    return HttpResponse(Tools.PrintException())

I've tried to search and have found many articles about this error but I think none of them are my problem!
unbound method must be called with instance as first argument (got nothing instead)
unbound method f() must be called with fibo_ instance as first argument (got classobj instance instead)

Community
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ehsan shirzadi
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2 Answers2

3

What you assign to c is a class, not an instance of a class. You should do:

c = Tools()

Further, you should call the method on the instance:

def err(request):
    a = 10
    b = 0
    msg = ""
    try:
        print a / b
    except Exception,ex:
        c = Tools()
        return HttpResponse(c.PrintException())

Note, that I've changed the indentation so the return statement is executed only on exception. This is the only way I can think of to make some sense out of it - it is unclear what are you trying to achieve exactly with your Tools class. This name is too generic - it doesn't tell anything about the purpose of this class.

BartoszKP
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2

To use your method without an instance of a class you can attach a class method decorator like so:

class Tool:
    @classmethod
    def PrintException(cls):
        return 'ok'

can be used:

>>> Tool.PrintException()
'ok'
>>>
kylieCatt
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