I am uploading the csv file, it is of the same format, still it is showing errror.
Error in diabeties
Share the link of your ipynb file after saving it on google drive.
Happy Learning 
Hey! I am not able to increase my accuracy more than 56% Do I have to increase k value?
Yes try out for various values of k, increase it a little bit. (Not more than 15 in any terms)
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