data = [{"name": "foo", "value": 1}, {"name": "bar", "value": 2}, {"name": "baz", "value": 3}]

# Want to turn into this:
# {"foo": {"name": "foo", "value": 1}, "bar": {"name": "bar", "value": 2}, "baz": {"name": "baz", "value": 3}}

# List comprehension
result = dict((item["name"], item) for item in data)

# map
result = dict(map(lambda item: (item["name"], item), data))

# dictionary comprehension (2.7+)
result = {item["name"]: item for item in data}

# Imperative
result = {}
for item in data:
    result[item["name"]] = item