从Django Management命令

Question

让我知道这个问题是否足够明显，而且这个问题也有重复，我事先未能进行搜索。

我正在尝试从Django管理命令运行pip install requirements/dev.txt。我有一个逻辑，如果缓存不变，不要尝试运行脚本pip ...。我想弄清楚如何从DMC运行这个命令？

用法：

python manage.py install_prepreqs
Cache is unchanged, skipping.... 

install_prepreqs.py

# I want to run `pip install requirements/dev.txt` with some additional logic. 

Answer 1

从Django内部运行pip可能不是一个好主意，但是如果你愿意，那就自己敲门：djangos custom-management-commands和pythons subprocess module

另请参阅this post有关子流程模块的信息。

from django.core.management.base import BaseCommand, CommandError
import subprocess

class Command(BaseCommand):
    def handle(self, *args, **options):
        # check your precondition logic here
        # ... your code goes here ...

        if my_condition == True:
            subprocess.run(["ls", "-l"])

        # ... some more code goes here if you wish ...