Question

The function below takes a single argument: data_list, a list containing a mix of strings and numbers. The function tries to use the Filter pattern to filter the list in order to return a new list which contains only strings longer than five characters. The current implementation breaks when it encounters integers in the list. Fix it to return a properly filtered new list.

Answer 1

Answer:

def filter_strings(data_list):

   string_list = []

   for s in data_list:

       if type(s) == str and len(s) > 5:

           string_list.append(s)

   return string_list

Explanation:

Create a function called filter_strings that takes data_list as a parameter

Initialize a new list to hold the strings that are longer than 5 characters

Initialize a for loop that iterates through the data_list

Check the elements if they are string - use type function, and if their length is greater than 5 - use len function. If an element satisfies the both conditions, put it to the string_list

When the loop is done, return the string_list