[web2py] strange decimal form field comparison result

[黄祥]

hi folks,

i have a decimal form field that validate during submit (running on web2py 
2.5.1):

e.g. on controller
def product():
    grid=SQLFORM.grid(db.product, onvalidation=__onvalidation_product)
    return locals()

def __onvalidation_product(form):
*    if form.vars.price_list >= form.vars.selling_price:*
        form.errors.selling_price = 'Selling Price must Greater than Price 
List'

when i insert price_list = 3 and selling_price = 3 the notification appears 
in the form field  prevent the data to be inserted. i think, it should be : 
when i insert price_list = 3 and selling_price = 3 the notification not 
appears and the data can be inserted

but
def __onvalidation_product(form):
*    if form.vars.price_list > form.vars.selling_price:*
        form.errors.selling_price = 'Selling Price must Greater than Price 
List'

when i insert price_list = 3 and selling_price = 3 the notification not 
appears and the data can be insert. i think, it should be : when i insert 
price_list = 3 and selling_price = 3 the notification appears to prevent 
the data to be inserted

is there any mistake in my logic or code above?

thanks and best regards

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