Using endswith to read list of files doesn't find extension in list

Question

I am trying to get my python script to read a text file with a list of file names with extensions and print out when it finds a particular extension (.txt files to be exact). It

Answer 1

Use str.rstrip to remove trailing whitespaces, such as \n or \r\n.

with open ("file_list.txt", "r") as L:
    for line in L:
        if line.rstrip().endswith(".txt"):
            print ("This has a .txt: " + line)

Answer 2

I guess you should add the endline sign \n at the end of the extension:

with open ("file_list.txt", "r") as L:
for line in L:
    if line.endswith(".txt\n"):
        print ("This has a .txt: " + line)

Answer 3

Each line ends with a new line character '\n' so the test will rightly fail. So you should strip the line first then test:

line.rstrip().endswith('.txt')
#      ^