print('\n')
print('----------Part E----------')
print('\n')

def copy_file(str1:str):
    infile_name = input("Please enter the name of the file to copy: ")
    infile = open(infile_name, 'r')
    outfile_name = input("Please enter the name of the new copy:  ")
    outfile = open(outfile_name, 'w')

    if str1 == 'line numbers':
        x = 1
        for line in infile:
            outfile.write("{0:5.0f}: {1:1}".format(x,line))
            x += 1

    if str1 == 'Gutenberg trim':
       exists = False
       for lines in infile:
            if '*** START ' in lines:
                exists = True
            if exists:
                outfile.write(lines)
            if '*** END' in lines:
                exists = False

    if str1 == 'statistics':
        l = 0
        emptyLines = 0
        counter = 0
        lineCharacters = []
        nonEmptyCharacters = []
        book = infile.readlines()

        for lines in book:
            l += 1
            if lines == '\n':
                emptyLines+= 1
            else:
                nonEmptyCharacters.append(len(book[counter]))
            lineCharacters.append(len(book[counter]))
            counter += 1
        lineAverage = float((sum(lineCharacters))/l)

        if emptyLines == 0:
            nonEmptyAverage = lineAverage
        else:
            nonEmptyAverage = float(sum((nonEmptyCharacters))/emptyLines)

        print("{0:0}         lines in the list".format(l))
        print("{0:3}       empty lines".format(emptyLines))
        print("{0:7.1f}   average characters per line".format(lineAverage))
        print("{0:7.1f}   average characters per non-empty line".format(nonEmptyAverage))

    else:
        for line in infile:
            outfile.write(line)
    infile.close()
    outfile.close()

copy_file('line numbers')
copy_file('Gutenberg trim')
copy_file('statistics')