python - List comprehension and % function -

When I am using the following code

  9, 10, 2) If not, then I% 3)]   
 gives it  
  & gt; (-9, -3, 3, 9)   
 Why do you give this answer? What does  'i% 3'  mean?  
 Thank you.  
  
 
 
 In your example, %  is  a% b  left  a / b   
 in your example, goes through the loop:  
  [- 9, -7 , -5, -3, -1, 1, 3, 5, 7, 9]   
  -9% 3  is equal to 0, because -9 3 is divisible by 3, and thus there is no remainder, however,  5% 3  2 returns because 3 in 5 goes once, and  5 - 3 == 2 .  
  No I% 3  is a bit difficult first,  i% 3  is evaluated. If the result is greater than 0, then it is considered as  true .  No  is a Boolean operator which becomes negative for bullion, then  is not true  is  wrong  (and  is not wrong  ).  
  0  is  is incorrect , so if  i% 3 == 0 , then  i < / Code> will be included in the new list.   > "Hello World" print because of the modulo operator is not. This is what the document will explain to me better: P It just happens that %  is also used.