yokome.util.persistence

yokome.util.persistence.list_as_tuple_hook(x)

Transform all list entries in a dictionary into tuples.

This function can be used to load JSON files with tuples instead of lists.

Parameters

x (dict) – A dictionary.

Returns

The input dictionary, with lists transformed into tuples.

yokome.util.persistence.quote(value)

Quote a value unambigously w.r.t. its data type.

The result can be used during import into a relational database.

Parameters

value – The value to transform.

Returns

'null' if value is None, 'true' if it is True, 'false' if it is ``False. For numeric values, the result is the corresponding string representation. Infinite values are represented by 'inf' and '-inf', respectively; not-a-number is represented by 'nan'. For strings, the result is the string itself, surrounded by '"', and with the characters '"', '\', '\b', '\t', '\n', '\v', '\f' and '\r' escaped using '\'.

Raises

TypeError – If value is neither None nor of type bool, int, float or str.

yokome.util.persistence.write_quoted(file, row)

Write a row of quoted CSV values to a file.

The values in row are quoted so that their data type can be detected unambiguously (see yokome.util.persistence.quote() for a detailed explanation). Furthermore, they are separated by the character ','. Lines are separated with '\n'.

Parameters

• file – The file to write to. It has to be open.

• row – An iterable of data values.