######################################################
### Open the jolly old file
###
### Keep reading the file one line at a time until it is empty
###    print each line as it passes by
###
### Close the file.
#######################################################

# Open sequences.fasta making the "File Handle" Sequence_File.
Sequence_File = open("sequences.fasta");

# File Handles are iterable objects that can be used by "for"
# to construct an iterator (using iter()) to read the lines of
# a file in order (using next())

for Line in Sequence_File:   # So for each Line in turn,
    print(Line, end='')      # Print out the Line, supressing the
                             # default EOL that print() adds to
                             # its output (there is already an EOL
                             # at the end of each line of the file)

Sequence_File.close()        # Tidily close the file.