format_pct(self, x, display_range)
If self.decimals
is :None:None:`None`, the number of digits after the decimal point is set based on the display_range of the axis as follows:
+---------------+----------+------------------------+ | display_range | decimals | sample | +---------------+----------+------------------------+ | >50 | 0 | x = 34.5
=> 35% | +---------------+----------+------------------------+ | >5 | 1 | x = 34.5
=> 34.5% | +---------------+----------+------------------------+ | >0.5 | 2 | x = 34.5
=> 34.50% | +---------------+----------+------------------------+ | ... | ... | ... | +---------------+----------+------------------------+
This method will not be very good for tiny axis ranges or extremely large ones. It assumes that the values on the chart are percentages displayed on a reasonable scale.
Format the number as a percentage number with the correct number of decimals and adds the percent symbol, if any.
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