def count_sequences(infile):
    '''Returns the number of sequences in a file'''
    seq_reader = sequences.file_reader(infile)
    n = 0
    for seq in seq_reader:
        n += 1
    return n
def count_sequences(infile):
    '''Returns the number of sequences in a file'''
    seq_reader = sequences.file_reader(infile)
    n = 0
    for seq in seq_reader:
        n += 1
    return n
def count_sequences ( infile ) : seq_reader = sequences . file_reader ( infile ) n = 0 for seq in seq_reader : n += 1 return n
Returns the number of sequences in a file
Returns the number of sequences in a file