def exrzip1():
	import nuke
	for filein in nuke.selectedNodes():
		inpath = filein['file'].value()
		if inpath.find('.exr') != -1:
			if inpath.find('_orig') == -1:
				outpath = inpath.replace('_v', '_zip1_v')
				fileout = nuke.nodes.Write( )
				nuke.Node.connectInput( fileout, 0, filein )     
				fileout['file'].setValue(outpath)
				fileout['file_type'].setValue('exr')
				fileout['compression'].setValue('1')
				fileout['datatype'].setValue('32 bit float')
				fileout['channels'].setValue('all')
			else:
				outpath = inpath.replace('_orig', '_zip1')
				fileout = nuke.nodes.Write( )
				nuke.Node.connectInput( fileout, 0, filein )     
				fileout['file'].setValue(outpath)
				fileout['file_type'].setValue('exr')
				fileout['compression'].setValue('1')
				fileout['datatype'].setValue('32 bit float')
				fileout['channels'].setValue('all')