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云计算开发:Python内置语句-exec 函数详解
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简介...
描述
exec 执行储存在字符串或文件中的P云计ython语句,相比于 eval,exec可以执行算开更复杂的 Python 代码。
需要说明的是在 Pyt发:hon2 中exec不是函数,而是一个内置语Py句(statement),但是Pythothn 2中有一个 execfile() 函数。可on以理解为 Python 3 把 exec 这个 st内置atement 和 execfile() 函数的功能语句够整合到一个新的 exec() 函数中去了。
语法
以下-e是 exec 方法的语法:
exec obj
参数
obj -xe- 要执行的表达式。
返回值
exec 返回值永远c 为 None。
实例
以下实例展示了 exec 的使函数用方法:
输出结果:
Tags:
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