# 創(chuàng)建新路徑
def make_dirs(path):
  if not os.path.isdir(path):
    os.makedirs(path)
# 獲取文件的行數(shù)
def get_total_lines(file_path):
  if not os.path.exists(file_path):
    return 0
  cmd = 'wc -l %s' % file_path
  return int(os.popen(cmd).read().split()[0])
# 函數(shù)split_file_by_row: 按行切分文件
# filepath: 切分的目標文件
# new_filepath: 生成新文件的路徑
# row_cnt: 每個文件最多包含幾行
# suffix_type: 新文件后綴類型，如兩位字母或數(shù)字
# return: 切分后的文件列表
def split_file_by_row(filepath, new_filepath, row_cnt, suffix_type='-d'):
  tmp_dir = "/split_file_by_row/"
  make_dirs(new_filepath)
  make_dirs(new_filepath+tmp_dir)
  total_rows = get_total_lines(filepath)
  file_cnt = int(math.ceil(total_rows*1.0/row_cnt))
    command = "split -l%d -a2 %s %s %s" % (row_cnt, suffix_type, filepath, new_filepath+tmp_dir)
    os.system(command)
    filelist = os.listdir(new_filepath+tmp_dir)
  command = "mv %s/* %s"%(new_filepath+tmp_dir, new_filepath)
  os.system(command)
  command = "rm -r %s"%(new_filepath+tmp_dir)
  os.system(command)
  return [new_filepath+fn for fn in filelist]