strange class property

[KaliLinux]

Why does the following program output "python is hard" ?

class t:
    def __init__(self):
        self.__t="python is hard"
t=t()
print(t._t__t)

[buran]

check https://dbader.org/blog/meaning-of-under...-in-python
in particular - part 3. Double Leading Underscore: __var

[KaliLinux]

Thanks!