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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_error(self):
 """Retrieve error data."""

        col_offset = -1
        if self.node is not None:
            try:
                col_offset = self.node.col_offset
            except AttributeError:
                pass
        try:
            exc_name = self.exc.__name__
        except AttributeError:
            exc_name = str(self.exc)
        if exc_name in (None, 'None'):
            exc_name = 'UnknownError'

        out = ["   %s" % self.expr]
        if col_offset > 0:
            out.append("    %s^^^" % ((col_offset)*' '))
        out.append(str(self.msg))
        return (exc_name, '\n'.join(out))