Question

我有两个文件，file1包含内容为

aaa

bbb

CCC

和文件2包含内容

CCC

DDD

EEE

AAA

RRR

BBB

NNN

我想这样做，如果file2包含file1的行，那么该行将从file2中删除。最后，file2将作为ddd EEE 存款准备金率 NNN 此外，我的代码是

f1 = open("test1.txt","r")
f2 = open("test2.txt","r")

    fileOne = f1.readlines()
    fileTwo = f2.readlines()
    f1.close()
    f2.close()
    outFile = open("test.txt","w")
    x = 0
    for i in fileOne:
        if i !=  fileTwo[x]:
            outFile.writelines(fileTwo[x])
        x += 1

outFile.close()

谢谢。

Answer 1

with open("f1.txt") as f1:
    s1 = set(f1)
with open("f2.txt") as f2, open("f3.txt","w") as f3:
    f3.writelines(x for x in f2 if x not in s1)

最好使用上下文管理器关闭文件（这就是with所做的事情。）

检查set的成员资格比list

更有效率

如果有可能有额外的空格，你应该删除这样的行

with open("f1.txt") as f1:
    s1 = set(x.strip() for x in f1)
with open("f2.txt") as f2, open("f3.txt","w") as f3:
    f3.writelines(x for x in f2 if x.strip() not in s1)

Answer 2

使用set difference查找两个文件的差异。

f1 = open("test1.txt","r").readlines()
f2 = open("test2.txt","r").readlines()

diff = set(f2) - set(f1)
outFile = open("test.txt","w")
outFile.writelines(line for line in f2 if line in diff)

Answer 3

使用您的代码......

f1 = open("test1.txt","r").read()
f2 = open("test2.txt","r").read()

fileOne = f1.splitlines()
fileTwo = f2.splitlines()

# remove the dup lines
nodup_lines = [line for line in fileTwo if line not in fileOne]
# join using newline character
newFileTwo = '\n'.join(nodup_lines)

# write file
outFile = open("test.txt","w")
outFile.write(newFileTwo)
outFile.close()

比较python中提取不同内容的两个文件的内容

3 个答案: