05.02.18 10:14, Ian Kelly пише:
On Mon, Feb 5, 2018 at 12:35 AM, Frank Millman <fr...@chagford.com> wrote:
So I have 2 questions -
1. Is there any particular reason why '|' is not supported?
'|' is the set union operation, roughly equivalent to the set.union
method. Dicts don't have a union operation. If they did, and the same
key were found in both sets, what would be the value of that key in
the union?
2. Is there a better way to do what I want?
The dict.items() view is explicitly set-like and can be unioned, so
you can do this:
py> dict(d1.items() | d2.items())
This doesn't work with non-hashable values.
The simplest (and perhaps the most efficient) way in recent Python
versions is:
{**d1, **d2}
In old Python versions this should be written as
d = dict(d1)
d.update(d2)
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