Why is 'key' an unexpected keyword of sort_values()

Question

I am trying to implement the code

sort_order = {
'Documentary':0,
'Film-Noir':1,
'Biography':2,
'History':3,
'War':4,
'News':5,
'Animation':6,
'Musical':7,
'Music':8,
'Drama':9
}

df.sort_values(by=['genre'], key=lambda x: x.map(sort_order))

But I receive this error:

TypeError: sort_values() got an unexpected keyword argument 'key'

I downloaded the latest version of Pandas to try and fix this using conda update pandas but this did not change anything. I know something is going wrong because their page here shows that key should be recognized.

Any help would be greatly appreciated.

your version of Pandas might not be recent. I'd suggest you update to the latest version — sammywemmy, Nov 01 '20 at 06:01
I have already tried that. I used this 'conda update pandas' to update it. For some reason, it still doesn't work though. — BioFluorescent277, Nov 01 '20 at 06:03
Thanks, I searched how to get that specific version and it now works :) — BioFluorescent277, Nov 01 '20 at 06:06

score 5 · Accepted Answer · answered Nov 01 '20 at 06:16

5

As mentioned in the comments section, Sorting with Keys is introduced in version 1.1.0.

You may run the following to update the package (note the -U flag):

python -m pip install -U pandas

answered Nov 01 '20 at 06:16

Tibebes. M

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[This solution](https://stackoverflow.com/a/42516653/812102) may be inspiring for people who don’t have access to this version. – Skippy le Grand Gourou Jan 05 '21 at 15:47

Why is 'key' an unexpected keyword of sort_values()

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