Update filter.py
Update filter.py
smharper/openmc,walshjon/openmc,wbinventor/openmc,paulromano/openmc,smharper/openmc,shikhar413/openmc,shikhar413/openmc,liangjg/openmc,smharper/openmc,paulromano/openmc,johnnyliu27/openmc,johnnyliu27/openmc,liangjg/openmc,liangjg/openmc,wbinventor/openmc,amandalund/openmc,amandalund/openmc,shikhar413/openmc,walshjon/openmc,amandalund/openmc,smharper/openmc,paulromano/openmc,johnnyliu27/openmc,liangjg/openmc,mit-crpg/openmc,wbinventor/openmc,mit-crpg/openmc,walshjon/openmc,mit-crpg/openmc,walshjon/openmc,paulromano/openmc,shikhar413/openmc,wbinventor/openmc,amandalund/openmc,johnnyliu27/openmc,mit-crpg/openmc