Python文件操作（上）_ 会读文件，程序便有了眼睛

#方法一：读取文件
f = open("./_math.py", "r", encoding="utf-8")
content = f.readlines()
for line in content:
    print(line)
f.close()




#方法二：读取文件，不用close()
with open("./_math.py", "r", encoding="utf-8") as f:
    for line in f.readlines():
        print(line)