def __init__(self, vertical, cont, end):
super(AbstractStyle, self).__init__()<EOL>self.vertical = vertical<EOL>self.cont = cont<EOL>self.end = end<EOL>assert (len(cont) == len(vertical) and len(cont) == len(end)), (<EOL>"<STR_LIT>" % (vertical, cont,<EOL>end))<EOL>
Tree Render Style.

Args:

    vertical: Sign for vertical line.

    cont: Chars for a continued branch.

    end: Chars for the last branch.