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Also head and tail in Pandas is 1 based! That drove me crazy. print(users[users.age > 25].head(3)) Returns 3 elements and not 4!
by baldfat 9y ago
Also head and tail in Pandas is 1 based! That drove me crazy.
print(users[users.age > 25].head(3))
Returns 3 elements and not 4!
- Bromskloss 9y agoIs it possible that the argument to `head` is the _number_ of elements to return, and that the choice of indexing therefore doesn't enter the picture?
- Bromskloss 9y agoActually, even if the argument (3 in this case) were an index, I would expect it to be the index of the first element _not_ to fetch, like how intervals typically are written with an inclusive lower bound and an exclusive upper bound as in "2 ≤ i < 13" [0]. That would make the result you're getting consistent with zero-indexing, but not with one-indexing. Of course, I don't know what Pandas is like outside this particular example, or what Pandas even is. A database thing? [0] https://www.cs.utexas.edu/users/EWD/ewd08xx/EWD831.PDF https://www.cs.utexas.edu/users/EWD/ewd08xx/EWD831.PDF