o ;Di@sddlmZmZmZddlmZmZddlmZddl m Z m Z dddZ Gdd d eZ dd d Zee_dddZee_ddZdddZee_GdddeZdS))absolute_importprint_functiondivision)picklenext)Table)read_source_from_argwrite_source_from_argNcCst|}t|S)a& Extract a table From data pickled in the given file. The rows in the table should have been pickled to the file one at a time. E.g.:: >>> import petl as etl >>> import pickle >>> # set up a file to demonstrate with ... with open('example.p', 'wb') as f: ... pickle.dump(['foo', 'bar'], f) ... pickle.dump(['a', 1], f) ... pickle.dump(['b', 2], f) ... pickle.dump(['c', 2.5], f) ... >>> # now demonstrate the use of frompickle() ... table1 = etl.frompickle('example.p') >>> table1 +-----+-----+ | foo | bar | +=====+=====+ | 'a' | 1 | +-----+-----+ | 'b' | 2 | +-----+-----+ | 'c' | 2.5 | +-----+-----+ )r PickleViewsourcer G/var/www/Datamplify/venv/lib/python3.10/site-packages/petl/io/pickle.py frompicklesrc@seZdZddZddZdS)r cCs ||_dSNr )selfr r r r__init__2s zPickleView.__init__c cs\|jd}z tt|Vq tyYnwWddS1s'wYdS)Nrb)r opentuplerloadEOFError)rfr r r__iter__5s "zPickleView.__iter__N__name__ __module__ __qualname__rrr r r rr 0s r TcCt||d||ddS)a Write the table to a pickle file. E.g.:: >>> import petl as etl >>> table1 = [['foo', 'bar'], ... ['a', 1], ... ['b', 2], ... ['c', 2]] >>> etl.topickle(table1, 'example.p') >>> # look what it did ... table2 = etl.frompickle('example.p') >>> table2 +-----+-----+ | foo | bar | +=====+=====+ | 'a' | 1 | +-----+-----+ | 'b' | 2 | +-----+-----+ | 'c' | 2 | +-----+-----+ Note that if a file already exists at the given location, it will be overwritten. The pickle file format preserves type information, i.e., reading and writing is round-trippable for tables with non-string data values. wbr modeprotocol write_headerN _writepickletabler r#r$r r rtopickle>s  r)FcCr)a= Append data to an existing pickle file. I.e., as :func:`petl.io.pickle.topickle` but the file is opened in append mode. Note that no attempt is made to check that the fields or row lengths are consistent with the existing data, the data rows from the table are simply appended to the file. abr!Nr%r'r r r appendpickleds  r+c Cst||}||9}t|}zt|}Wnty%YWddSw|r/t||||D] }t|||q1WddS1sFwYdSr)r riterr StopIterationrdump) r(r r"r#r$rithdrrowr r rr&vs    "r&cCst||||dS)zZ Return a table that writes rows to a pickle file as they are iterated over. )r r#r$) TeePickleViewr'r r r teepicklesr3c@seZdZdddZddZdS) r2NrTcCs||_||_||_||_dSrr')rr(r r#r$r r rrs zTeePickleView.__init__c cs|j}t|j}|dE}t|j}zt|}Wnty*YWddSw|jr5t |||t |V|D]}t |||t |Vqs  " #