def delete_all_dems():
while 1:
print 'Deleting another 500'
try:
db.delete(DEMDataFile.all().fetch(500))
except:
print 'Caught error, continuing...'
def copy_and_delete_dem(b):
if b.key().name() == None:
bn = DEMDataFile.get_or_insert(str(b.x)+'_'+str(b.y),x=b.x,y=b.y,contents=b.contents)
if bn:
b.delete()
else:
raise 'Could not create key based entity for '+b.to_xml()
def update_insert_dem(input):
startByte = input[0]
if int(startByte)==0: # ignore first line..its a header
return;
line = input[1]
fields=line.split(',')
print line, fields
x=int(fields[1])
y=int(fields[0])
contents=db.Blob(base64.b64decode(fields[2]))
e=DEMDataFile.get_or_insert(fields[1]+'_'+fields[0])
e.x=x
e.y=y
e.contents=contents
e.put()
def do_delete_named_dem(id):
b=DEMDataFile.get_by_key_name(str(id))
if b:
b.delete()
def do_all_copy_and_delete_dem(count):
earray = DEMDataFile.all().fetch(count)
if len(earray)==0:
return
for e in earray:
copy_and_delete_dem(e)
