Package csb :: Package io :: Module tsv :: Class Operator

Class Operator

object --+    
         |    
      Step --+
             |
            Operator

Instance Methods

__init__(self, table, expression, predicate)
x.__init__(...) initializes x; see help(type(x)) for signature

source code

select(self, *columns)
Returns: a new Table

source code

update(self, column, value)
Update column for all rows in the table. source code

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__, __subclasshook__

Properties

Inherited from Step: expression, table

Inherited from object: __class__

Method Details

init(self, table, expression, predicate)
(Constructor)

source code

x.__init__(...) initializes x; see help(type(x)) for signature

Overrides: object.__init__: (inherited documentation)

select(self, *columns)

source code

Parameters:

columns (str, tuple of str) - column names; defaults to all columns

Returns:

a new Table

Raises:

InvalidColumnError - when an invalid column is requested

update(self, column, value)

source code

Update column for all rows in the table.

Parameters:

column (str) - column to update (name)
value - new column value

Raises:

InvalidColumnError - when an invalid column is referenced

Class Operator

__init__(self, table, expression, predicate) (Constructor)

select(self, *columns)

update(self, column, value)

init(self, table, expression, predicate)
(Constructor)