在检查是否包含字符串时获得完全匹配的行

Question

I would like to find exact match for items from tuple. Why does my code return True for all lines? I want it to return false. Any ideas? What am I doing wrong?

test1.xml - 
<field1ff>1</field1ff>
<field1ff>1</field1ff>
<field2ff>1</field2ff>
<field2ff>1</field2ff>




fields_to_find = {"<field1>","<field2>"}

file = open("test1.xml", "r")
for line in file.readlines():
    if (s in line for s in fields_to_find):
        print("true")

Answer 1

You are passing a generator object to your if statement, for which the boolean evaluation is True :

bool((s in line for s in fields_to_find))

Returns:

True

Instead, IIUC you can use any() and pass your generator:

any(s in line for s in fields_to_find)

Returns:

False