Chaining FilterExpressions

Hello,

Trying to follow this PR: https://github.com/SAP/python-pyodata/pull/113

love this change, very good implementation but am having some problems chaining AND and OR operators together.

item = {
    "id": 1,
    "name": 'item name',
    "description": "foo-bar",
    "city": "1000",
}

# Query should look like this:
term="foo"      # search by string term on two fields - OR on name and description
city=1000       # AND search only those with city = 1000


get_entities().filter(Q(name__contains="foo") | Q(description__contains="foo"), city="1000")

# It does this:
{'$filter': ["city eq '1000' and (substringof('foo', name) eq true) or (substringof('foo', description) eq true)"]}

But it needs another ( ) around substring filters to fetch correct items.

Is this possible using these filters?

Many thanks!