Python master to do data table manipulation and organization

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Bids
18
Avg Bid (USD)
$63
Project Budget (USD)
$30 - $80

Project Description:
Actually I already have a python program to do this but this is too slow and error prone.

Since I already have a program, it will be easy for you to compete it.

The program does "Change the column x of file X (usually tab-delimited txt) to column y1 of file Y if column x of file X is in column y2 of file Y"

But this program causes "memory error" with large files especially when the output file is xlsx and too slow.

I hope you have good understanding and carefulness.

I will tell you more story after you post message.

Skills required:
Python
About the employer:
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