[英]A PYTHONSTARTUP file for a specific directory
I've heard about the PYTHONSTARTUP file as a way to automatically load specified modules and other code when starting python. 我听说过PYTHONSTARTUP文件是一种在启动python时自动加载指定模块和其他代码的方法。 But PYTHONSTARTUP is a global thing, for all instances of python. 但对于python的所有实例,PYTHONSTARTUP是一个全局的东西。 Is there such a thing as PYTHONSTARTUP that I can place in a specific directory and runs only when I start python in that directory? 有没有PYTHONSTARTUP这样的东西,我可以放在一个特定的目录中,只有当我在该目录中启动python时才运行?
This sounds like you want to use virtualenv
. 这听起来像你想使用virtualenv
。 It's a tool for creating isolated python environments with hooks for individual settings. 它是一个用于创建具有用于个别设置的钩子的隔离python环境的工具。 Just put them in the bin/activate
of your virtualenv. 只需将它们放入你的virtualenv的bin/activate
中。
Just export the PYTHONSTARTUP
environment variable before starting up each project. 在启动每个项目之前,只需导出PYTHONSTARTUP
环境变量。
export PYTHONSTARTUP=$HOME/myproject/.pystartup
python ~/myproject/start.py
export PYTHONSTARTUP=$HOME/myotherproject/.pystartup
python ~/myotherproject/start.py
Or you could have a simple bash file that contains the environment and the python command you wish to run. 或者你可以有一个简单的bash文件,其中包含你想要运行的环境和python命令。
#!/bin/sh
# filename: workon.sh
export PYTHONSTARTUP=$HOME/myproject/.pystartup
python ~/myproject/start.py
Then: 然后:
./workon.sh
As PYTHONSTARTUP
is an environment variable, you can set it on a per-instance basis. 由于PYTHONSTARTUP
是一个环境变量,您可以基于每个实例进行设置。
In sh-compatible shells, you can set a variable for the duration of a single process with 在sh兼容的shell中,您可以在单个进程的持续时间内设置变量
PYTHONSTARTUP=/home/you/special.py python arguments ...
To set it permanently for all Python instances, put something like 要为所有Python实例永久设置它,请添加类似的内容
PYTHONSTARTUP=/home/you/regular.py
export PYTHONSTARTUP
in your shell's startup file. 在你的shell的启动文件中。
You can override the global default for the current shell: 您可以覆盖当前shell的全局默认值:
bash$ PYTHONSTARTUP=/home/you/another.py
(and export PYTHONSTARTUP
if it's not already exported) or for individual processes as per the first example. (并且如果尚未导出则export PYTHONSTARTUP
)或根据第一个示例导出单个进程。
On Windows and in Csh-compatible shells, the details of the syntax will be different, but the concept is by and large the same. 在Windows和兼容Csh的shell中,语法的细节会有所不同,但概念基本相同。
You can add some code in the python startup-file, which only executes depending on your current working directory. 您可以在python启动文件中添加一些代码,该代码仅根据您当前的工作目录执行。
Adding the snippet below in .python
prints hello if python is started from /home/myuser/mydir
. 如果从/home/myuser/mydir
启动python,则在.python
添加下面的代码段.python
打印hello。
import os
if os.getcwd()=="/home/myuser/mydir":
print "hello"
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