William Parco GISP you could do something like below:
import os, arcpy
fc = r"C:\PROJECTS\Collector\FieldData.gdb\ResidentialBuildings"
tbl = r"C:\PROJECTS\Collector\FieldData.gdb\ResidentialBuildings__ATTACH"
fldBLOB = 'DATA'
fldAttName = 'ATT_NAME'
attachRelate = 'REL_GLOBALID'
parcelField = 'OBJECTID'
parcelRelate = 'GlobalID'
outFolder = r"C:\Temp\Python\Attachments"
with arcpy.da.SearchCursor(tbl,[fldBLOB,fldAttName, attachRelate]) as cursor:
for row in cursor:
binaryRep = row[0]
with arcpy.da.SearchCursor(fc, [parcelField], "{0} = '{1}'".format(parcelRelate, row[2])) as cursor2:
for row2 in cursor2:
fileName = str(row2[0]) + ".jpg"
open(outFolder + os.sep + fileName, 'wb').write(binaryRep.tobytes())
print 'Finished'
attachRelate = foreign key in attachment table (used for relationship)
parcelField = field you want the attachment to be called once exported
parcelRelate = primary key in feature class (used for relationship)