python - __init__() takes exactly 2 arguments (1 given)?

Question

I would like to know where am lagging, Looking for your advices..

class Student_Record(object):

    def __init__(self,s):
        self.s="class_Library"
        print"Welcome!! take the benifit of the library"

    def Student_details(self):
        print " Please enter your details below"

a=raw_input("Enter your name :
")
print ("your name is :" +a)
b=raw_input("Enter your USN :
")
print ("Your USN is:" ,int(b))
c=raw_input("Enter your branch :
")
print ("your entered baranch is" +c)
d=raw_input("Enter your current semester :
")
print ("your in the semester",int(d))
rec=Student_Record()
rec.Student_details(self)

I am getting this error ..

TypeError: init() takes exactly 2 arguments (1 given)

Answer 1

Your Student_Record.__init__() method takes two arguments, self and s. self is provided for you by Python, but you failed to provide s.

You are ignoring s altogether, drop it from the function signature:

class Student_Record(object):
    def __init__(self):
        self.s = "class_Library"
        print"Welcome!! take the benifit of the library"

Next, you are calling the method rec.Student_details() passing in an argument, but that method only takes self, which is already provided for you by Python. You don't need to pass it in manually, and in your case the name is not even defined in that scope.