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matplotlib.axes.Axes.format_ydata
- Axes.- format_ydata(y)
- 
    Return y formatted as an y-value. This function will use the fmt_ydataattribute if it is not None, else will fall back on the yaxis major formatter.
Examples using matplotlib.axes.Axes.format_ydata
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 https://matplotlib.org/3.4.3/api/_as_gen/matplotlib.axes.Axes.format_ydata.html