# Write a function that read data from todo.csv
# and write the data to output.txt file


def write_to_file1(fname):
    # infile = None      # for input file (if we want to create a variable before opening a file)
    # outfile = None     # for output file
    infile = open(fname, "r")      # open file to be read in

    # Read the entire file, then split lines, resulting in a list of lines
    data = infile.read().split('\n')
    # print(data)     # let's see what we read from the file (print in console)

    outfile = open('output-w-write-1.txt', 'w')      # open file to be written out

    # Write to file, using write(string_to_be_written),
    # pass in string (content) to be written (note: *must* be string),
    outfile.write(str(data))

    # Since we open the files, using open(), be sure to close them
    outfile.close()
    infile.close()


######################################

def write_to_file2(fname):
    # open file to be read in, and assign it to a variable named infile
    with open(fname, "r") as infile:
        # Read the entire file, then split lines, resulting in a list of lines
        data = infile.read().split('\n')
        # print(data)
    # The infile file is automatically closed when the execution
    # of the with open block is completed.
    # Therefore, no need to call .close()
    # note: *must* indent all the code related to this file

    # open file to be written out, and assign it to a variable named outfile
    with open('output-w-write-2.txt', 'w') as outfile:
        # Write to file, using write(string_to_be_written),
        # pass in string (content) to be written (note: *must* be string),
        outfile.write(str(data))
        # The outfile file is automatically closed when the execution
        # of the with open block is completed.
        # Therefore, no need to call .close()
        # note: *must* indent all the code related to this file


######################################

def write_to_file3(fname):
    infile = open(fname, "r")
    data = infile.read().split('\n')

    outfile = open('output-w-write-3.txt', 'w')
    for line in data:
        outfile.write(line + '\n')
        # Unlike print(), write() does not insert new line.
        # To format the output file line by line,
        # we must explicitly include the new line character ('\n')

    outfile.close()
    infile.close()


######################################

def write_to_file4(fname):

    with open(fname, "r") as infile:
        data = infile.read().split('\n')

    with open('output-w-write-4.txt', 'w') as outfile:
        for line in data:
            outfile.write(line + '\n')
            # Unlike print(), write() does not insert new line.
            # To format the output file line by line,
            # we must explicitly include the new line character ('\n')


######################################


write_to_file1("todo.csv")
write_to_file2("todo.csv")
write_to_file3("todo.csv")
write_to_file4("todo.csv")


# This version will reopen the output file for each line
# Because of the "w" (write mode), the line previously written in the file
# was wiped off as the cursor goes back to the beginning of the file.