CODEWITHSUNDEEP
python-3.xlist-comprehension
Madhumathi
Madhumathi

Reputation: 69

Could someone explain in detail about how that for loop works and how it looks without list comprehension?

def delete_books(name):
    books=list_book()
    books=[book for book in books if book['name']==name]
    savefile_books(books)

My question is about list comprehension in python. I requested you to explain in detain about this for loop. How its work and how its look in normal code without list comprehension?

Upvotes: 1

Views: 50

Answers (2)

ebbishop
ebbishop

Reputation: 1983

This function will do the same as your function, but without list comprehension:

def delete_books_no_list_comprehension(name):
  books = list_book()
  filtered_books = []
  for book in books:
    if book['name'] == name:
      filtered_books.append(book)
  savefile_books(filtered_books)

See also, for more info: https://www.pythonforbeginners.com/basics/list-comprehensions-in-python

Upvotes: 0

Lior Cohen
Lior Cohen

Reputation: 5735

books = [book for book in books if book['name']==name]

it is the same as:

new_books = []

for book in books:
  if book['name']==name:
     new_books.append(book)

books = new_books

As you see the list comprehension is much more elegant.

Upvotes: 2

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