python

How to replace element values in the list if element is not None?

I need to remove some specific character from a list of element, but some element is None.

I have a list of elements, such as

row= ['Hello,World','$Hello World', None]

I need a python code to remove',' and '$'from the element. My code looks like this but is an invalid syntax:

row=[item.replace('$','').replace(',','') if item is not None for item in row]

I need to keep the None in the list, so the required output should be ['HelloWorld', 'Hello World', None]

How to fix it?

Solution 
  • [item.replace('$', '').replace(',','') for item in row if item]

    If you want to keep the None

    [item.replace('$', '').replace(',','') if item else item for item in row]

    Note: If you have anything other than strings and Nonetypes in the list, it'd be a good idea to check the element is a string or responds to the replace method before calling replace.