matplotlib.pyplot.locator_params
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matplotlib.pyplot.locator_params(axis='both', tight=None, **kwargs)[source] - 
Control behavior of major tick locators.
Because the locator is involved in autoscaling,
autoscale_viewis called automatically after the parameters are changed.Parameters: - 
axis{'both', 'x', 'y'}, optional - 
The axis on which to operate.
 - 
tightbool or None, optional - 
Parameter passed to
autoscale_view. Default is None, for no change. 
Other Parameters: - **kwargs
 - 
Remaining keyword arguments are passed to directly to the
set_params()method of the locator. Supported keywords depend on the type of the locator. See for exampleset_paramsfor theticker.MaxNLocatorused by default for linear axes. 
Examples
When plotting small subplots, one might want to reduce the maximum number of ticks and use tight bounds, for example:
ax.locator_params(tight=True, nbins=4)
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    https://matplotlib.org/3.2.2/api/_as_gen/matplotlib.pyplot.locator_params.html