How to change multiple elements in a list?-CodePudding

Goal: User can choose a section of the list via list slicing to change to ' '

Example of list

list=['a','','','','','','','','','','b','','','','','','','','','','c','','','']

user can choose Start and End of list slice (start=0 and end=12)

start=input("Where to start? ")
end=input("Where to end? ")

What I tried:

list[int(start):int(end)]=['']

Excepted result everything from 0:12 is changed to ' '

['','','','','','','','','','','','','','','','','','','','','c','','','']

Actual result everything from 0:12 was removed from the list

['', '', '', '', '', '', '', '', '', 'c', '', '', '']

Any ideas on how to get this to work and why the code of line I tried doesn't work?

CodePudding user response：

Firstly you shouldn't use keywords such as list for variable names.

Here you are replacing a large slice of your list with a single element so to fix this repeat the element for the same length of the slice.

start = int(start)
end = int(end)
my_list[start:end] = ['']*(end - start)

If you havent come across multiplying a list before it just repeats the elements that many times so for example ["a", "b"]*3 == ["a","b","a","b","a","b"]

CodePudding user response：

You can use a while loop to solve this issue.

i = start
while i =< end:
  list[i] = "whatever you want"
  i  = 1