Filtering a list of tuples with lambda expressions in Python

Question

What would be the right filter so l will contain [(7,10),(9,20)]

>>> l=[(0,5),(7,10),(9,20),(18,22)]
>>> l=filter(lambda x: x[0]>6 and x[1]<21, l)
>>> l
<filter object at 0x7fb2349829e8>
>>>

I'm getting a "filter object", rather than a list of the 2 middle tuples from the original list.

Use list in front of the lamba expression. stackoverflow.com/questions/12319025/filters-in-python — duncster94
– duncster94, Commented Jul 13, 2016 at 20:15

niklas · Accepted Answer · 2016-07-13 20:16:18Z

15

>>> l=[(0,5),(7,10),(9,20),(18,22)]
>>> l=filter(lambda x: x[0]>6 and x[1]<21, l)
>>> list(l)
>>> [(7,10),(9,20)]

answered Jul 13, 2016 at 20:16

niklas

3,0234 gold badges45 silver badges73 bronze badges

Sign up to request clarification or add additional context in comments.

1 Answer 1