[python 读取文件]读文件一次读n行 #python #文件

read_file.py

with open('test.txt') as f
    for line in f:
        print(line)

read_n_lines.py

from itertools import islice


def next_n_lines(file_opened, N):
    return [x.strip() for x in islice(file_opened, N)]

  
with open("samplefile", 'r') as f:
    x = ""
    while x != []:
      x = next_n_lines(f, 5)  # returns a list
      pass  # do something to x