ipython 分析器

发布于 2025-01-07 13:04:18 字数 797 浏览 0 评论 0原文

我有一些 python 代码可以工作，但不幸的是速度超级慢。 #python 的某人建议我可以通过分析器运行代码，以查看代码花费最多时间的行和函数。

我想要分析的 python 源代码从 STDIN 读取。但由于输入很大，我将输入编译为文件，以便我可以简单地将其重定向到 shell 中的 python 代码。因此，在 shell 中，我发出命令。

cat input | python pythonsource.py

问题是，当我尝试在 ipython 中运行探查器时，我似乎找不到将输入重定向到 python 代码的方法。在 ipython shell 中，我尝试过，

run -p -l 1.0 pythonsource.py input (didn't work. simply waits at STDIN for input)
run -p -l 1.0 pythonsource.py << input (didn't work)
run -p -l 1.0 cat input | python pythonsource.py (didn't work.)

我不知道该怎么做，我可以使 ipython profiler 命令将输入重定向到 STDIN，以便 pythonsource 读取。有人可以告诉我如何解决这个问题吗？或者我完全错了？也许还有其他更干净、更智能的方法来分析 python 代码？

也许我接下来要问的应该是另一个问题的一部分......但我想知道当 ipython 在 ipython 探查器的某些输出中引用“原始调用”时是什么意思？

谢谢。

原文

I have some code in python that works but is unfortunately super slow. Someone at #python suggested that I can run the code through a profiler to see the lines and functions in which the code was taking the most amount of time.

The python source code that I want to profile reads from STDIN. But since the input is large I compiled the input as a file so that I can simply redirect it to the python code at the shell. So at the shell, I issue the command..

cat input | python pythonsource.py

The problem is, when I try to run the profiler in ipython I can't seem to find a way to redirect the input to the python code. At the ipython shell, I tried,

run -p -l 1.0 pythonsource.py input (didn't work. simply waits at STDIN for input)
run -p -l 1.0 pythonsource.py << input (didn't work)
run -p -l 1.0 cat input | python pythonsource.py (didn't work.)

I'm not sure how to do I can make the ipython profiler command redirect the input to STDIN for the pythonsource to read from. Could someone please tell me how to fix this? Or have I got it totally wrong? Maybe there is some other cleaner, more smarter way of profiling python code?

And maybe what I ask next should be a part of another question..but I was wondering what does ipython mean when it refers to "primitive calls" in some of the output of the ipython profiler?

Thank you.

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指尖上得阳光 2025-01-14 13:04:18

在 shell 命令行上重定向输入的正确方法如下：

cat input | run -p -l 1.0 python pythonsource.py

run -p -l 1.0 python pythonsource.py < input

语法 << string 创建一个“此处文档”，它不会重定向输入。

从 python 提示符（希望在 ipython 中），您可以像这样重定向标准输入：

import sys
save_stdin = sys.stdin
sys.stdin = open('input')
run -p <etc.>
sys.stdin = save_stdin # Restore the real stdin

或者（推荐）您可以重写源代码以使用文件名：如果您按如下方式调用它，“输入”将在 中sys.argv[1] 你可以打开它并从中读取：

python pythonsource.py input

The right way to redirect input on the shell commandline is as follows:

cat input | run -p -l 1.0 python pythonsource.py

run -p -l 1.0 python pythonsource.py < input

The syntax << string creates a "here document", it does not redirect input.

From the python prompt (and hopefully in ipython), you can redirect standard input like this:

import sys
save_stdin = sys.stdin
sys.stdin = open('input')
run -p <etc.>
sys.stdin = save_stdin # Restore the real stdin

Or (recommended) you could rewrite your source to work with a filename: If you call it as follows, "input" will be in sys.argv[1] and you can open it and read from it: