TypeError: unsupported operand type(s) for %: 'list' and 'int' | very interesting case?

Question

x_=[range(1,1000000)]
def pr(x_):
        for a in x_:
                # is type(a) int ?? 
                if a==2 or  a==3 :
                        x_[a-1]=0
                        continue
                for j in  range(2,a):
                        if(a%j==0):
                                x_[a-1]=0
                                break
pr(x_)

TypeError: unsupported operand type(s) for %: 'list' and 'int' | very interesting case?

Answer 1

x_=[range(1,1000000)]

This will cause x_ to be [[1, 2, 3, ... 999999]] . Note the two brackets. It is a doubly nested list, so a will be a list and not an int. If you just want a to be an int and x_ to be [1, 2, 3, ... 999999] , try

x_ = range(1,1000000)