用Python读取几十万行文本数据

keyword_list=[line.strip() for line in open("keywords.txt",'r')]
#f1=open("part_wiki_vec.txt",'r')
f1=open("wiki_vectors.txt")
f2=open("result.txt",'w')
i=0
content=f1.readlines()
while i<1150:
 for line in content[300*i:300*(i+1)]:
  line=line.strip().split(' ')
  if line[0] in keyword_list:
   wordvec=' '.join(line)
   print wordvec
   f2.write(wordvec)
  #print line
 i+=1