python - How to fix an Empty output for STDERR? -

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my program working , printing correct stdout stderr i'm getting ''empty output stream''

can fix code?, i'm stuck here.

input

285 242 2053   260 310 450   10   682

output

207229

my code

def sum_leaves(k, inputs, count=1):         a, b, m, l1, l2, l3, d, r = map(int, inputs)     x = (((a*k)+b) % m)     y = (((a*k)+2*b) % m)      if k < l1 or count == d:         my_list.append(k)     elif l1 <= k < l2:         sum_leaves(x, inputs, count + 1)     elif l2 <= k < l3:         sum_leaves(y, inputs, count + 1)     elif l3 <= k:         sum_leaves(x, inputs, count + 1)         sum_leaves(y, inputs, count + 1)     if count == 1:         return sum(my_list)   def read_input(input_string):     inputs = input_string.split()     a, b, m, l1, l2, l3, d, r = map(int, inputs)     x = (((a*r)+b) % m)     y = (((a*r)+2*b) % m)      if l1 <= r < l2:         return sum_leaves(x, inputs)     elif l2 <= r < l3:         return sum_leaves(y, inputs)     elif l3 <= r:         sum_leaves(x, inputs)         return sum_leaves(y, inputs)  my_list = [] if __name__ == '__main__':     print(read_input(input()))

you aren't sending stderr. print() sends stdout. use print("error", file=sys.stderr) send stderr.


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