python读取文件的面试题

# !/usr/bin/env python
# -*- coding: utf-8 -*-

# 加中间值
import codecs

with open("./test.txt","r") as fp:
    txt = fp.readlines()

print(txt)
sum = 0
for i in txt:
    sum+=int(i[1])

print(sum)


# 从每一行截取出一点数据
f = codecs.open('test.txt', mode='r', encoding='utf-8')  # 打开txt文件，以‘utf-8’编码读取
line = f.readline()   # 以行的形式进行读取文件，有换行也会读取出来
list1 = []
while line:
    # a = line.split()
    b = line[0:1]   # 这是选取需要读取的位数
    list1.append(b)  # 将其添加在列表之中
    line = f.readline()
f.close()
print(list1)