[FEATURE] Allow 1 or many (not necessarily all) columns to be renamed at once.

[anusha5695]

Is your feature request related to a problem? Please describe.
When we try to rename 30 columns out of a 1000 column CSV file, we are left with 2 options:

1. we'll have to call df.rename 30 times, one for each column
2. We'll have to loop through the 1000 columns and construct another array of columns renamed and call df.renameAll with the new array

This might also not be readable when i want to know what are the exact columns that are being renamed.

Describe the solution you'd like
There can be a method say df.renameMany taking params in the format:

{ "src_column_1":"renamed_1",
"src_column_2":"renamed_2",
"src_column_3":"renamed_3", ...
}

Describe alternatives you've considered
We are currently calling df.rename multiple times for each column

[anusha5695]

Im willing to raise a PR for this

[Gmousse]

Hi @anusha5695, that's a good idea.

I think that adding a new method could be disturbing.
Instead I plan:

• to deprecate .renameAll
• to deprecate the current usage of .rename
• to integrate your new behaviour on .rename (keeping the current behaviour beside).

Are you working on a PR ?

[anusha5695]

HI @Gmousse : Yes Im working on it already. Will issue a PR by this weekend.

[anusha5695]

Hi @Gmousse , i have raised the PR.

About the decprecations, i can volunteer for that.

[Gmousse]

Hi @anusha5695 , thank you for the PR, I will review it asap.
Don't worry about the deprecation, I take it.

[anusha5695]

Hi @Gmousse : Did you get a chance to look at it?

[Gmousse]

Hi sorry I was busy @Gmousse (summer doesn't help :D).

I keep 1 hour tommorow to review your PR.