module 'src.triple_square' from '/app/src/triple_square.py'> does not have the attribute 'triple

[martes-53]

I don't understand the error message as in title. I'm only in exercise part01-e06_triple_square.
def main():
pass
def square(i):
"square raises its parameter to the power of two"
return ii
def triple(i):
'triple multiplies its parameter by three'
return 3i
#
for i in [1,2,3,4,5,6,7,8,9,10]:
t=triple(i)
s=square(i)
if s>t:
break
print(f"triple({i})=={t} square({i})=={s}")

if name == "main":
main()

The code executes as expected, but when tested with tmc test, error as follows is shown:
Testing: part01-e06_triple_square
Failed: test.test_triple_square.TripleSquare.test_calls
<module 'src.triple_square' from 'C:\Users\admin\Documents\DataA\hy-data-analysis-with-python-summer-2019\part01-e06_triple_square\src\triple_square.py'> does not have the attribute 'square'

Failed: test.test_triple_square.TripleSquare.test_calls2
<module 'src.triple_square' from 'C:\Users\admin\Documents\DataA\hy-data-analysis-with-python-summer-2019\part01-e06_triple_square\src\triple_square.py'> does not have the attribute 'square'

Test results: 0/2 tests passed
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How can I fix the code?