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I wish to update column A in dfA with column B in dfB on index overlap

dfA

     A
1    1
2    1
3    1
4    1

dfB

     B
3    2
4    2
5    2
6    2

Desired result:

     A
1    1
2    1
3    2
4    2

What is the simplest way to do this?

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1 Answer 1

Reset to default
2

Try with update

dfA.update(dfB.rename(columns = {'B':'A'}))
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2 Comments

Works well. Thank you!
I was thinking of the same thing too! But slower 9 mins ;p

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