import re
f=open("E:\Python\wenjian.txt",'r', encoding='UTF-8')
data1 = f.readlines()
#print(data1)
f.close()
results = []
for line in data1:
    data2 = line.split()
    #print(data2[0])
    m=re.findall(r'thumbnail',data2[0])
    if m:
        results.append(line)
        print(m)
f2 = open('E:\Python\w.txt', 'w')
f2.writelines(results)
f2.close()