Python PPTX - How to set chart axis number format and range

Question

I'm trying to accommodate a Bar Chart Y axis with a range from 0 to 1 with 1 decimal place like: 1.2 for tick labels:

I can set it to start at 0 with:

 Thisvalue_axis.minimum_scale = 0

And I can set the top value with:

 Thisvalue_axis.major_unit = 1

But the intermediate tick labels are not showing

here is my code:

Thisvalue_axis = ThisChart.value_axis
Thisvalue_axis.minimum_scale = 0
Thisvalue_axis.major_unit = 1
Thisvalue_axis.minor_tick_mark = XL_TICK_MARK.OUTSIDE
Thisvalue_axis.has_minor_gridlines = True

Is it possible to Make the values between 0 and 1 display and set the numberformat?

Answer 1

You should set the top value by using:

value_axis.maximum_scale = 1

And then set the major unit to 0.1 or 0.2 or whatever suits:

value_axis.major_unit = 0.1

This particular example would show 0.0, 0.1, 0.2, ... 1.0 as the tick mark labels.

Another look results from setting the major unit as 1 and setting the minor unit to 0.1 (or whatever you like). This would generally show a more prominent tick mark for the major unit and a less prominent one for the minor unit. Note however that tick labels only appear on the major tick marks.

The number format is set using the TickLabels object available on Axis.tick_labels :

value_axis.tick_labels.number_format = '0.0'