一行一行的读取，速度较慢
def read_line(path):
with open(path, 'r', encoding='utf-8') as fout:
line = fout.readline()
while line:
line = fout.readline()
print(line)
II、第二种读取方式
设置每次读取大小，从而完成多行快速读取
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)
III、第三种读取方式
使用itertools模块,islice返回的是一个生成器，可以用list格式化
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)
