Searching word in a file

#importing sys for automatically exit if there's error
import sys

#inputing file
file_name = raw_input("Input your file name you want to read : ")

#search file, exit when there's no file
try:
    file = open(file_name, 'r')
except:
    print "No such files"
    sys.exit(2)

#inputting keyword
word = raw_input("Input your text : ")

#making lists of string
strings = []

#reading every char in file
for string in file.read():
    #append every char into lists
    strings.append(string)

#joining every char to one string
strings =  ''.join(str(e) for e in strings)

#splitting every word by \n
strings = strings.split('\n')

#checking every word in lists
for string in strings:
    if word == string:
        print word + " match!"

#closing file
file.close()