问写入文件时出错

EN

def custom_sorter(first, second):
    """ A Custom Sort function which compares items
    based on the value in the 2nd and 6th columns. """
    # First, we break the line into a list
    first_items, second_items = first.split(u'|'), second.split(u'|')  # Split on the pipe character.
    if len(first_items) >= 6 and len(second_items) >= 6:
        # We have enough items to compare
        if (first_items[1], first_items[5]) > (second_items[1], second_items[5]):
            return 1
        elif (first_items[1], first_items[5]) < (second_items[1], second_items[5]):
            return -1
        else:  # They are the same
            return 0  # Order doesn't matter then
    else:
        return 0

with open(src_file_path, 'r') as src_file:
    data = src_file.read()  # Read in the src file all at once. Hope the file isn't too big!
    with open(dst_sorted_file_path, 'w+') as dst_sorted_file:
        for line in sorted(data.splitlines(), cmp = custom_sorter):  # Sort the data on the fly
            dst_sorted_file.write(line)  # Write the line to the dst_file.

from subprocess import check_call

with open("sort_blast.txt",'wb') as output_file:
     check_call("sort -k2,2 -k6,6n".split() + [tab.name], stdout=output_file)

def custom_key(line):
    fields = line.split() # split line on any whitespace
    return fields[1], float(fields[5]) # Python uses zero-based indexing

with open(tab.name) as input_file, open("sort_blast.txt", 'w') as output_file:
     L = input_file.read().splitlines() # read from the input file
     L.sort(key=custom_key)             # sort it
     output_file.write("\n".join(L))    # write to the output file