python - Move file to new directory only if it contains specified string -

i have 1 folder thousands of files , need loop through every single file , see if file contains specific string, once has concluded has specific string, must moved correct folder. far have:

for filename in glob.iglob('*.txt'):     f = open(filename)     s = mmap.mmap(f.fileno(), 0, access=mmap.access_read)     if s.find('* test outcome : fail') != -1:             src_file = os.path.join(dirstart, filename)             dst_file = os.path.join(dirfail, filename)             shutil.move(src_file, dst_file + filename) 

at moment, moves first file know fact there's more. thanks

from re import compile  pattern = compile("\* test outcome : fail") filename in glob.iglob('*.txt'):     fl = open(filename, 'r')     in fl.readlines():         if pattern.search(i):             fl.close()             src_file = os.path.join(dirstart, filename)             dst_file = os.path.join(dirfail, filename)             shutil.move(src_file, dst_file + filename)             break #to stop checking other lines