google.appengine.api.memcache.offset_multi

Offsets multiple keys by a delta, incrementing and decrementing in batch.

google.appengine.api.memcache.offset_multi(
    mapping, key_prefix='', namespace=None, initial_value=None
)

mapping Dictionary mapping keys to deltas (positive or negative integers) to apply to each corresponding key.
key_prefix Prefix for to prepend to all keys.
initial_value Initial value to put in the cache, if it doesn't already exist. The default value, None, will not create a cache entry if it doesn't already exist.
namespace A string specifying an optional namespace to use in the request.

Dictionary mapping input keys to new integer values. The new value will be None if an error occurs, the key does not already exist, or the value was not an integer type. The values will wrap-around at unsigned 64-bit integer-maximum and underflow will be floored at zero.