IPython与Spyder的cd命令 [英] cd command in IPython vs. Spyder

问题描述

我知道许多在IPython中工作的工作目录提示也可以在Spyder中工作，只要它们以％开头。

I know that many of the working directory prompts that work in IPython also work in Spyder as long as they're prefaced by %.

例如， pwd 和 ls 在IPython中工作，但要在Spyder中运行相同的命令，他们需要以％开头，例如：％pwd 和％ls 。

For example, pwd and ls work in IPython, but to run the same commands in Spyder they need to be prefaced with a % such as: %pwd and %ls.

要更改IPython中的目录，我可以运行cd命令，如： cd C：\ Users \ ...但是，这似乎在Spyder中不起作用，即使以％开头。有什么建议？

To change the directory in IPython, I can run the cd command like: cd C:\Users\... HOWEVER, this doesn't seem to work in Spyder, even when prefaced with a %. Any suggestions?

我知道 os.chdir（'C：\\Users\\'）有效，只是想了解为什么％cd C：\ Users \ 不...

I know that os.chdir ('C:\\Users\\') works, just trying to understand why %cd C:\Users\ doesn't...

推荐答案

运行％foo 时，该命令在作为自己的进程运行的新shell实例中运行。当shell退出时，对其状态（例如其工作目录）的更改将随之丢失;它们不影响产生它的父Python进程。

When you run %foo, that command is run in a new shell instance running as its own process. When that shell exits, changes to its state (such as its working directory) are lost with it; they don't effect the parent Python process that spawned it.

这与运行 sh -c'cd /'的方式相同不会更改shell中的当前工作目录。 （实际上，以 sh -c$ some_command运行新进程正是标准C库调用 system（some_command），及其Python等价物 os.system（some_command）有效。）

This is the same as how running sh -c 'cd /' doesn't change your current working directory in shell. (Indeed, running a new process as sh -c "$some_command" is exactly how the standard-C library call system(some_command), and its Python equivalent os.system(some_command) works).

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