Lines from similarites

lines.py

def lines(file1, file2):
    result = set()
    def getLinesList(file):

    # storage array
        fileList = []
        # temp storage array
        tempList = []

        # if all lines have \n at the end
        for i in file:
            # if not a new line, then all one line
            if not i == "\n":
                # add all to new list on line
                tempList.append(i)
            else:
                # when end of line
                # make a string
                tmp = ''.join(tempList)
                # push string into file list
                fileList.append(tmp)
                # clear the array
                tempList.clear()

        finalLine = getFinalLine(file)
        # if return is not None; since if nothing, still returns None
        if(finalLine != None):
            # append final line to the list of lines
            fileList.append(finalLine)

        removedList = removeBlankLines(fileList)

        # if there were blank lines, use the new    list, else use the origial
        if(removedList != fileList):
            print('reassign')
            fileList = removedList

        return fileList

    lines1 = getLinesList(file1)
    # print(lines1)
    lines2 = getLinesList(file2)

    # print(lines1)
    for i in lines1:
        for j in lines2:
            if i == j:
                # add to the set
                result.add(i)

    # make set into a list with this syntax
    result = list(result)
    print(result)
    return result
# if last line does not end in a \n, get that line
def getFinalLine(str):
    # get final \n
    last_n = str.rindex("\n")
    # get all of string at exists after that
    lastLine = str[last_n:len(str)]
    # space is equal to 1, single char equal to 2
    # if len 1, space, means there is already a \n
    print(f"len:{len(lastLine)}")
    if(len(lastLine) <= 1):
        return #returns None if this fires
    else:
        # if greater than one, no \n, needs to be handled
        # strip off all spaces
        return lastLine.strip()

# remove extra \n following the end of the text, they show up as "" in finalList
def removeBlankLines(inputList):
        results = []
        # take all non-blank lines and make a new list
        for i in  inputList:
            if(i != ""):
                # print(i)
                results.append(i)
            # else:
                # print(i)
        return results