code: def delta(self, signature):
          "Generates delta for remote file via API using local file's signature."
          return self.api.post('path/sync/delta', self.path, signature=signaturef delta(self, signature):
          "Generates delta for remote file via API using local file's signature."
          return self.api.post('path/sync/delta', self.path, signature=signature)
docs: Generates delta for remote file via API using local file's signature.