I just pushed a patch to cdsutils (now r441) that includes improved CDSMatrix support:

• Supports "ramping" matrices with the "ramping=True" option:
  • the load() method is used to load values (NOTE: must be called after any put operation)
  • the TRAMP property is used to set the TRAMP
  • the is_ramping() method can be used to check if any element is currently ramping
• The get/put() methods can be used to get/put any element, row, column, or entire matrix.
• The zero() method can be used to zero any element, row, column, or entire matrix.

See the built-in help for full documentation:

jameson.rollins@operator1:~ 0$ guardian -i
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aLIGO Guardian Shell
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ezca prefix: H1:

In [1]: from cdsutils import CDSMatrix

In [2]: help(CDSMatrix)