Python：从Jupyter Notebook执行终端命令

Question

I want to run C++ simulations from a jupyter notebook. The program needs three values in input, ie 10 , 0.2 and 0.6 .

This what I am doing now and it works fine:

## Compile
! mpicxx -o main main.cpp Node.cpp Agent.cpp -std=gnu++11
## Run
! mpirun -np 1 ./main 10 0.2 0.6

But if try to declare those values before, it does not recognizes them.

a = 10
b = 0.2
c = 0.6
! mpirun -np 1 ./main a b c

Answer 1

you need to type it like this

a = 10
b = 0.2
c = 0.6
! mpirun -np 1 ./main {a} {b} {c}

Answer 2

It looks like (from this document ) you can wrap your Python variables in curly braces or else prefix them with the $ to get the to expand for the shell. Eg, ! mpirun -np 1 ./main {a} {b} {c} ! mpirun -np 1 ./main {a} {b} {c}

Answer 3

! mpirun -np 1 ./main {a} {b} {c}

---

! mpirun -np 1 ./main $a $b $c