如何在pythin中对两个重复文件进行排序

Question

我有两个列表: biglist.txt和deletelist.txt。我需要在symbols.txt中打印与deletelist.txt不完全匹配的逐行行。到目前为止这是我的密码。它有时会进入if found_dup == False:行，而不是found_dup为false。我哪里出问题了？

f = open("biglist.txt", "r")
g = open("deletelist.txt", "r")
h = open("uniquelines.txt", "a")
found_dup = False
for x in f:
    for y in g:
        if x == y:
            found_dup = True
    if found_dup == False:
        h.write(x)
    found_dup = False
f.close()
g.close()
h.close()

Answer 1

with open("biglist.txt", "r") as f:
     biglist = [line.rstrip('\n') for line in f]
with open("deletelist.txt", "r") as g:
    deletelist = [line.rstrip('\n') for line in g]

uniquelineslist = list(set(biglist).symmetric_difference(set(deletelist)))

with open("uniquelines.txt", "w") as h:
    for item in uniquelineslist:
        h.write("%s\n" % item)