def func(x, y=1, z=2):
return z * (x + y)
ans = func(3, 4, 5)
ans = func(3)
ans = func(3, z=-1)
ans = func(3, z=1, y=2)
ans = func(3, y=2, 1)
File "<ipython-input-7-a58389f95d0f>", line 7
ans = func(3, y=2, 1) # エラー
^
SyntaxError: positional argument follows keyword argument