class_docstr: A simple keyring which just stores provided info in memory
  
  Primarily for testing
docstr: Get password from the specified service.
          
docstr_tok: ["Get","password","from","the","specified","service","."]
code: def get(self, name, field):
      """Get password from the specified service."""
      # to mimic behavior of keyring module
      return (
          self.entries[name][field]
          if name in self.entries and field in self.entries[name]
          else None
      )
  
file_path: datalad/datalad/support/keyring_.py
imports: import os
  import logging
label_desc: Use image node_id 2 for calling the MemoryKeyring obj's underlying member method code with example usage: obj.get(name, field) and returns: unknown