Impacted versions:10

Steps to reproduce:
Following the code in https://www.odoo.com/documentation/10.0/api_integration.html both in a fresh install and against 'https://demo.odoo.com/start' trows a type error

Current behavior:
Now I get an error when executing:

```
ids = models.execute_kw(db, uid, password,  'res.partner', 'search',
    [[['is_company', '=', True], ['customer', '=', True]]],
    {'limit': 1})
[record] = models.execute_kw(db, uid, password,
    'res.partner', 'read', [ids])
# count the number of fields fetched by default
len(record)
```

In particular it seems to be a type error (cannot marshal class odoo.tools.float_utils.float_precision)

Expected behavior:
I would expect it to behave as in the documentation

openerp/fields.py
""" One2many field; the value of such a field is the recordset of all the
        records in ``comodel_name`` such that the field ``inverse_name`` is equal to
        the current record.
        :param comodel_name: name of the target model (string)
        :param inverse_name: name of the inverse ``Many2one`` field in
            ``comodel_name`` (string)
        :param domain: an optional domain to set on candidate values on the
            client side (domain or string)
        :param context: an optional context to use on the client side when
            handling that field (dictionary)
        :param auto_join: whether JOINs are generated upon search through that
            field (boolean, by default ``False``)
        :param limit: optional limit to use upon read (integer)
        The attributes ``comodel_name`` and ``inverse_name`` are mandatory except in
        the case of related fields or field extensions.
    """
    type = 'one2many'
    _slots = {
        'inverse_name': None,           
        'auto_join': False,             
        'limit': None,                  
        'copy': False,                  
    }
    def __init__(self, comodel_name=Default, inverse_name=Default, string=Default, **kwargs):