python 文档比对

----> 22.txt <----
111,aaa
222,bbb
222,bbb

----> 33.txt <----
111,aaa
333,bbb

#取交集 intersection
def compare_txt_inter(file1,file2):
    with open(file1,"r") as file1, open(file2,"r") as file2:
        content1=set(file1.readlines()) #set返回一个无序去重的集合 eg:{1,3,2}
        content2=set(file2.readlines())
        content3=content1.intersection(content2)
        return content3
#返回结果
#111,aaa

#取并集 union
def compare_txt_union(file1,file2):
    with open(file1,"r") as file1, open(file2,"r") as file2:
        content1=set(file1.readlines())
        content2=set(file2.readlines())
        content3=content1.union(content2)
        return content3
#返回结果
#111,aaa
#222,bbb
#333,bbb

#取差集 symmetric_difference
def compare_txt_diff(file1,file2):
    with open(file1,"r") as file1, open(file2,"r") as file2:
        content1=set(file1.readlines())
        content2=set(file2.readlines())
        content3=content1.symmetric_difference(content2)
        return content3    
#返回结果
#222,bbb
#333,bbb

file1='D:\\Test_Script\\22.txt'
file2='D:\\Test_Script\\33.txt'

content=compare_txt_diff(file1,file2)

if content:
    with open('D:\\Test_Script\\44.txt','w') as outfile:
        for line in content:
            outfile.write(line)    
else:
    print("内容为空")