Add non-fold style list

[jeffkit]

By default, a list element was convert to a set of tag wrap in the name tag(parent tag).

>>> data = {'mylist': ['hello', 'world']}
>>> dicttoxml.dicttoxml(data, attr_type=False)
'<?xml version="1.0" encoding="UTF-8" ?><root><mylist><item>hello</item><item>world</item></mylist></root>'

Some times, we need other style of list:

'<?xml version="1.0" encoding="UTF-8" ?><root><mylist>hello</mylist><mylist>world</mylist></root>'

so, I add a optional argument to the dicttoxml method: fold_list, default value is True, act as usual, when set to False, the list style will change to non-fold style.

BTW: I made the code style PEP8 compatible.

[quandyfactory]

The latest version includes the ability to customize the name of the item elements. Does this change meet your requirements?

[wisotzky]

I think the use-case is valid. Assuming the following instance of data should be translated to XML:

{
            "book": [
                {
                    "license": "GPL", 
                    "title": "Python Programming"
                }, 
                {
                    "license": "Apache 2.0", 
                    "title": "Business Modelling"
                }
            ]
}

Using dicttoxml typically the output would look like this:

<library>
  <book>
    <item>
      <license>GPL</license>
      <title>Python Programming</title>
    </item>
    <item>
      <license>Apache 2.0</license>
      <title>Business Modelling</title>
    </item>
  </book>
</library >

But what you want is to avoid additional folding:

<library>
  <book>
    <license>GPL</license>
    <title>Python Programming</title>
  </book>
  <book>
    <license>Apache 2.0</license>
    <title>Business Modelling</title>
  </book>
</library >

Such flat list rendering is currently not supported. And even having the possibility to change the customize the item element naming does not really help, as we cannot suppress the creation of the list-level element.

I've play around quite a bit with various input structures, but without any helpful format. Such as

[{'book': {'license': 'GPL', 'title': 'Python Programming'}}, {'book': {'license': 'Apache 2.0', 'title': 'Business Modelling'}}]

[wisotzky]

This PR is now obsoleted by PR #64, merging the code proposal with the latest release of dicttoxml.