Return a writer object responsible for converting the user's data into delimited

strings on the given file-like object. *csvfile* can be any object with a

``newline=''`` [1]_. An optional *dialect*

parameter can be given which is used to define a set of parameters specific to a

particular CSV dialect. It may be an instance of a subclass of the

Create an object which operates like a regular writer but maps dictionaries

onto output rows. The *fieldnames* parameter is a :mod:`sequence

<collections.abc>` of keys that identify the order in which values in the

*f*. The optional *restval* parameter specifies the value to be

written if the dictionary is missing a key in *fieldnames*. If the

*fieldnames*, the optional *extrasaction* parameter indicates what action to

take.

If it is set to ``'raise'``, the default value, a :exc:`ValueError`

To make it easier to specify the format of input and output records, specific

formatting parameters are grouped together into dialects. A dialect is a

:class:`writer` objects, the programmer can specify a string or a subclass of

the :class:`Dialect` class as the dialect parameter. In addition to, or instead

of, the *dialect* parameter, the programmer can also specify individual

Writer Objects

the :func:`writer` function) have the following public methods. A *row* must be

mapping fieldnames to strings or numbers (by passing them through :func:`str`

first) for :class:`DictWriter` objects. Note that complex numbers are written

out surrounded by parens. This may cause some problems for other programs which

Doc/library/bdb.rst

Doc/library/collections.rst

Doc/library/copy.rst

Doc/library/ctypes.rst

Doc/library/dbm.rst

Doc/library/decimal.rst