python了解题思路

Question

在文件每行都是四则运算的表达式 3+4 56 2-1 代码执行后结果如下 3+4=7 56=11 2-1=1

Answer 1

逐行读取文件,用eval()计算即可

with open(r'data.txt', 'r', encoding='utf-8') as fileObj:
    for line in fileObj:
        s = line.strip()
        print(s,"=",eval(s))