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

source code

    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