radix sort method | Python Fiddle

class sort(object):
    def __init__(self,num_arrayt):
        self.num_array=num_array
    def accept(self):
        for i in range(int(x)):
            n=raw_input("num :")
            num_array.append(int(n))
    def radix(self):
        b=[]
        f=[]
        d1=10
        d2=1
        n=1
        while n<=3:
            f=[0,0,0,0,0,0,0,0,0,0]
            j=0
            while j<int(x):
                f[(num_array[j]%d1)/d2]+=1
                j=j+1
            i=1
            while i<10:
                f[i]=f[i]+f[i-1]
                i+=1
            l=int(x)-1
            while l>=0:
                b[f[(num_array[l]%d1)/d2]]=num_array[l]
                f[(num_array[l]%d1)/d2]-=1
                l-=1
            k=0
            while k<int(x)-1:
                num_array[k]=b[k]
                k+=1
            d1=d1*10
            d2=d2*10
            n+=1
    def display(self):
         print(num_array)

num_array=list ()
x=raw_input("Enter how many 3 digit no.u wanna to insert in the string" )
obj=sort(num_array)
obj.accept()
obj.radix()
obj.display()

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