def find_leftmost_T_bit(self):
    '\n        Out of all 1 (True) bits, returns position of the leftmost one of\n        those to the the left of position bpos. Returns -1 if there is no\n        such bit.\n\n        Returns\n        -------\n        int\n\n        '
    if self.bit_is_T((self.len - 1)):
        return (self.len - 1)
    else:
        return self.find_T_bit_to_right_of((self.len - 1))
Out of all 1 (True) bits, returns position of the leftmost one of
those to the the left of position bpos. Returns -1 if there is no
such bit.

Returns
-------
int
def find_leftmost_T_bit(self):
    '\n        Out of all 1 (True) bits, returns position of the leftmost one of\n        those to the the left of position bpos. Returns -1 if there is no\n        such bit.\n\n        Returns\n        -------\n        int\n\n        '
    if self.bit_is_T((self.len - 1)):
        return (self.len - 1)
    else:
        return self.find_T_bit_to_right_of((self.len - 1))