FIX: better updates for py310

    def __init__(self):

        self.expression = ''

        self.tuple_count = 0

        self.in_index = False

        super().__init__()

    def visit_Name(self, node):

        if self.tuple_count == 0:

        self.expression += node.id

        else:

            self.expression += node.id + ', '

            self.tuple_count -= 1

        self.generic_visit(node)

    def visit_Index(self, node):

        pre_strip = len(self.expression)

        self.expression = self.expression.rstrip(', ')

        post_strip = len(self.expression)

    def visit_Subscript(self, node):

        self.visit(node.value)

        self.expression += '['

        self.generic_visit(node)

        self.visit(node.slice)

        self.expression += ']'

        # If we stripped the space for the next tuple element to accomodate a

        # nested index we now need to add that space back

        if post_strip < pre_strip:

            self.expression += ', '

    def visit_Subscript(self, node):

        # Changed by Python 3.10

        self.visit_Index(node)

    def visit_Tuple(self, node):

        self.tuple_count = len(node.elts) - 1

        self.generic_visit(node)

        trailing_comma = ''

        for n in node.elts:

            self.expression += trailing_comma

            self.visit(n)

            trailing_comma = ', '

    def visit_BinOp(self, node):

        self.visit(node.left)