Python读取大文件

def read_line(path):
    with open(path, ‘r‘, encoding=‘utf-8‘) as fout:
        line = fout.readline()
        while line:
            line = fout.readline()
            print(line)

def read_size(path):
    with open(path, "r", encoding=‘utf-8‘) as fout:
        while 1:
            buffer = fout.read(8 * 1024 * 1024)
            if not buffer:
                break
            print(buffer)

from itertools import islice
def read_itertools(path):
    with open(path, ‘r‘, encoding=‘utf-8‘) as fout:
        list_gen = islice(fout, 0, 5)  # 两个参数分别表示开始行和结束行
        for line in list_gen:
            print(line)