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HomeBackend DevelopmentPython Tutorial如何在一个py程序里执行另一个py程序?

在搜索引擎上搜过,未果
问题的详细描述:假设在桌面有一个“A.py”,当A.py被运行的时候会自动打开“B.py”(不在桌面,而是在其他路径,并且这个路径已知)。

实现效果类似于如下代码:

<span class="kn">import</span> <span class="nn">os</span>
<span class="n">start_dire</span> <span class="o">=</span> <span class="s">r"E:\*.txt"</span>
<span class="n">os</span><span class="o">.</span><span class="n">system</span><span class="p">(</span><span class="s">"explorer.exe </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span><span class="n">start_dire</span><span class="p">)</span>

回复内容:

考虑到题主是新手,我就多说几个方法

0. runpy.run_path('my_awesome_program.py')
首选这个方法,全平台通用


1. 直接import那个文件(如果那个文件没加__name__=='__main__'判断的话),如果文件名是变量的话,用__import__('my_awesome_program')

2. os.startfile('my_awesome_program.py')
这是windows-only的,自己用用还行,稍微大一点的项目就别用了

3. os.system('python "%s"' % 'my_awesome_program.py')
但如果对方电脑的python不在%path%里就挂了,因此还是仅限自己用

4.用subprocess,命令行同上,用法请自行百度或者查文档
同样也仅限自己用

5. 你试试execfile('my_awesome_program.py'),我没试过,不确定行不行
UPDATE: 我试过了,可以,好像这个也是全平台通用的。 Python不知道,不过Perl语言有一个内置变量$^X,其内容是正在执行当前脚本的Perl解释器的路径。可以用那个变量的内容去执行另一个Perl脚本:
system($^X, "another_script.pl");
先读.py的文件,然后使用eval函数执行.py的文件内容,或者用import 至少有两种方法,假定b.py在E盘的根目录:
1. 把B.py所在的路径加入系统路径:
<span class="kn">import</span> <span class="nn">sys</span>
<span class="n">sys</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s">'E:/'</span><span class="p">)</span>
<span class="kn">import</span> <span class="nn">b</span>
<span class="n">b</span><span class="o">.</span><span class="n">foo</span><span class="p">()</span>
把explorer.exe换成python.exe试试
还可以通过import来执行其他文件里的代码
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