Comments (2)
The API is deliberately fairly close to the original LINQ API. I'd be happy to include something like that as an example. In fact, I have exactly that example around here somewhere.
from asq.
Here is a quite naive (and probably not very efficient) implementation
identity = lambda x: x
def freqtable(iterable, func=identity, descending=True):
ft = {}
for elt in iterable:
value = func(elt)
if func(elt) not in ft:
ft[value] = 1
else:
ft[value] += 1
ft = [(k, v) for k, v in ft.items()]
ft = sorted(ft, key=lambda e: e[1], reverse=descending)
return ft
iterable = [
{"v": "a"},
{"v": "b"},
{"v": "c"},
{"v": "d"},
{"v": "e"},
{"v": "f"},
{"v": "e"},
{"v": "b"},
{"v": "b"},
]
print(iterable)
func = lambda elt: elt["v"]
ft = freqtable(iterable, func=func)
print(ft)
integrating with asq and making use of iterators will be much better!
from asq.
Related Issues (14)
- The setup.py script imports the asq package, which can fail if ordered dict is not available. HOT 1
- to_dictionary() to_lookup() default for Grouping HOT 2
- short import HOT 2
- PEP8
- Outer join HOT 1
- fun api HOT 1
- Query Chaining docs have a layout mistake HOT 1
- order_by(self, func=identity, descending=False) HOT 3
- Inherit from Queryable HOT 4
- Iterable from order_by not behaving as expected. HOT 4
- order_by cause an empty sequence HOT 2
- where cause an empty sequence HOT 10
- negative index when using last() on OrderedQueryable HOT 1
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from asq.