@author jackzhenguo @desc @date 2019/2/15
17 计算表达式
将字符串str 当成有效的表达式来求值并返回计算结果取出字符串中内容
In [1]: s = "1 + 3 +5" ...: eval(s) Out[1]: 9
python-small-examples/md/17.md at master · data-python/python-small-examples
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