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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 format_column(self, label, column):
 """Return a formatting function that pads & truncates values."""

        if len(column) == 0:
            val_width = 0
        else:
            val_width = max(len(self.format_value(v)) for v in column)
        val_width = min(val_width, self.max_width)
        width = max(val_width, len(str(label)), self.min_width, len(self.etc))
        def pad(value, label=False):
            if label:
                raw = value
            else:
                raw = self.format_value(value)
            if len(raw) > width:
                prefix = raw[:width-len(self.etc)] + self.etc
            else:
                prefix = raw
            return prefix.ljust(width)
        return pad