Python Notes

Preface

NoteAbout

This is my Python notes (Last updated: 2025-05-11)

I am an R user who is learning Python. I’m building my reference for Python. Also, It has some R code as well.

Warning

Note that this is a work in progress book, so the content is imperfect and subject to change.

prices = {'apple': 0.75, 'egg': 0.50}
cart = {
  'apple': 1,
  'egg': 6
}

bill = sum(prices[item] * cart[item]
           for item in cart)

print(f'I have to pay {bill:.2f}')
#> I have to pay 3.75

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