python - Filtering for multiple strings on f.read -

ive been playing various ways filter multiple strings on f.read(). cant seem find 1 works id expect to, apart multiple separate loops refuse believe there isn't more elegant solution.

i trying akin to:

if 'string' or 'string2' or 'string3' in f.read(): 

i have tried few variations such as:

if ('string1', 'string2','string3') in f.read():  if f.read() ('string1', 'string2','string3'): 

of course i've not found way working in manner expect, , google , docs failing to, enlighten me?

after kasramvd's enlightenment below shows both elegance , function. take note of finale line specifically.

check_list = ['string1', 'string2', 'string3'] filename in files:      f = open(root + filename)      fi = f.read()      if any(i in fi in check_list): 

you close in fist code need use or between conditions not objects, can change following :

with open('file_name') f:     fi = f.read()     if 'string' in fi or 'string2' in fi or 'string3' in fi: 

but instead of can use built-in function any :

with open('file_name') f:     fi = f.read()     if any(i in fi in word_set) 

and if dealing huge file instead of loading whole of file content in memory can check existence of strings in each line function :

def my_func(word_set):     open('file_name') f:         line in f:             if any(i in line in word_set):                 return true         return false