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Wrapper for Cloud Spanner Session objects.
Classes
Session
Session(database, labels=None, database_role=None)Representation of a Cloud Spanner Session.
We can use a Session to:
createthe session- Use 
existsto check for the existence of the session dropthe session
| Parameters | |
|---|---|
| Name | Description | 
database | 
        
          Database
          The database to which the session is bound.  | 
      
labels | 
        
          dict (str -> str)
          (Optional) User-assigned labels for the session.  | 
      
database_role | 
        
          str
          (Optional) user-assigned database_role for the session.  |