I think this is:
```
numpy.ma.masked_print_option.set_display

In [5]: numpy.ma.masked_print_option.set_display?
Type:       instancemethod
String Form:<bound method _MaskedPrintOption.set_display of -->
File:       /proj/sot/ska/arch/x86_64-linux_CentOS-5/lib/python2.7/site-packages/numpy/ma/core.py
Definition: numpy.ma.masked_print_option.set_display(self, s)
Docstring:  Set the string to print for masked values.
```