def bankcreate( requset , info_id = 0 ):

    print(' -----> id is ' + str(info_id))
    errors = []
    default = None

    if info_id is not None and info_id > 0 :
        try:
            default = BankAccounts.objects.get(id=info_id , user_id=requset.user.id)
        except BankAccounts.DoesNotExist :
            default = None


    if requset.POST :
        VALIDATIONRULES = {} # some rules here
        data , errors = validation(requset , VALIDATIONRULES)

        if not errors :

            if info_id > 0 and  default is not None:
                ba = default
            else :
                ba = BankAccounts()

            ba.bank_accnumber = data['bank_accnumber']
            ba.bank_cartnumber = data['bank_cartnumber']
            ba.bank_shabanumber = data['bank_shabanumber']
            ba.bank_title  = data['bank_title']
            ba.user_id = requset.user.id
            ba.save()

            return redirect('account-bank')
        else:
            default = data

    return render(requset , 'account/bankcreate-form.html' ,
    {'default':default , 'errors':errors} )

urlpatterns = [
    url(r'^$', views.index , name='account-home'),
    url(r'^edit$', views.edit , name='account-edit'),
    url(r'^bankinfo', views.bankinfo , name='account-bank'),
    url(r'^bankcreate/(?:/(?P<info_id>[1-9]+)/)?', views.bankcreate , name='account-bankcreate'),

]

url(r'^bankcreate/(?:/(?P<info_id>[1-9]+)/)?', views.bankcreate , name='account-bankcreate'),

http://localhost:8000/account/bankcreate/1/

url(r'^bankcreate/(?:/(?P<info_id>[1-9]+)/)?/$'

url(r'^bankcreate/(?:/(?P<info_id>[1-9]+)/)?$'

Page not found (404)
Request Method:     GET
Request URL:    http://localhost:8000/account/bankcreate/1/

Using the URLconf defined in paypal.urls, Django tried these URL patterns, in this order:

        ^$
        ^admin/
        ^account/ ^$ [name='account-home']
        ^account/ ^edit$ [name='account-edit']
        ^account/ ^email [name='account-email']
        ^account/ ^bankinfo [name='account-bank']
        ^account/ ^bankcreate/(?:/(?P<info_id>[1-9]+)/)?$ [name='account-bankcreate']
        ^account/ ^password [name='account-password']
        ^gateway/
        ^auth/

    The current URL, account/bankcreate/1/, didn't match any of these.