向打开的python终端发送命令

Question

The goal is to open python terminal with pre-execution of some commands. In real life it's loading some modules and defines some variables, but here is a simplified version:

from subprocess import Popen, CREATE_NEW_CONSOLE

r=Popen("python",creationflags=CREATE_NEW_CONSOLE)
r.communicate(input=b"print(2+2)")

CREATE_NEW_CONSOLE is used, because otherwise terminal window doesn't appear (I run the code from IDE). The code above opens a python terminal window, but input doesn't get there. Trying some variations stops window from appearing, like:

r=Popen(["python","print(2+2)"],creationflags=CREATE_NEW_CONSOLE)

Or

r=Popen("python",creationflags=CREATE_NEW_CONSOLE, stdin=PIPE)
r.communicate(input=b"print(2+2)")

So what can be done to solve the problem?

Answer 1

this is what the environmental variable PYTHONSTARTUP is for...

see: https://docs.python.org/2/using/cmdline.html#envvar-PYTHONSTARTUP

another option would be to use the -c -i switches

C:\>python -i -c "x = 2+2;y=3+3"
>>> x
4
>>> y
6
>>>