Beautiful and concise Python (2)

This beautiful and concise Python mainly introduces two ways of writing, which will greatly save the time and cost of writing code and improve your Python writing level.

1. Create a list quickly

• Example 1: Create a list quickly

    ls = [i for i in range(0,10)]
    print(ls)

• Example 2: Of course, we can also use this method to quickly create a list of strings

    lst_str = [('hi '+i) for i in ['dongjk','ki','fi']]
    print(lst_str)

Second, calculate the sum of the even numbers in the list

	ls = [i for i in range(0,10)]
    print(ls)
    s = sum([num for num in ls if num % 2 == 0])
    print(s)

3. How to quickly create a collection

   set1 = {
    
    x ** 2 for x in range(10) if x % 2 == 0}
   print(set1)