将多个参数列表从 python 传递到 java 程序并使用 subprocess.communicate 取回返回码答案

【问题标题】：Pass multiple list of parameters from python to java program and get back return code using subprocess.communicate将多个参数列表从 python 传递到 java 程序并使用 subprocess.communicate 取回返回码
【发布时间】：2019-06-15 22:19:11
【问题描述】：

需要以下代码的帮助 - 我想将三个列表的字符串元素作为输入传递给我在 python 脚本中调用的 java 程序。这是我到目前为止所做的 -

import subprocess
from subprocess import PIPE
from subprocess import Popen

amount = ['23.5', '12.5', '56.0', '176.1']
invoice_no = ['11290', '12892', '12802', '23489']
date = ['2/3/19', '12/30/17', '04/21/2018', '8/12/17', '12/21/18']

## problem is proc.communicate(). I am currently passing only invoice_no[i] as input.

for i in range (0, len(invoice_no)):
    proc = subprocess.Popen(['java', '-jar', '/data/python/xyz.jar'],stdin=PIPE,stdout=PIPE, stderr=STDOUT)
    q = proc.communicate(input = invoice_no[i])
    print(q)
## But I want to pass amount and date as input as well. 
## I dont know the syntax for that. I also want output as 1 or 0 i.e success or failure. Does anyone know syntax for this?

我看到的大多数问题都是将单个字符串作为输入传递。但这不是我想要的。即使是 subprocess 的官方文档也无助于找出如何传递多个输入语法。链接是-running java program from python script

How to execute java program using python considering inputs and outputs both

【问题讨论】：

不应该 -jar 参数也应该是 Popen 的单独参数吗？
不完全确定.. 我是 python 新手。在浏览了许多问题和文件后，我能够达到这一点。

标签： java python python-2.7 subprocess

【解决方案1】：

因为我找到了答案。我想我会把它贴在这里。可能有人会觉得它有用 -

   import subprocess
   from subprocess import PIPE
   from subprocess import Popen

   amount = ['23.5', '12.5', '56.0', '176.1']
   invoice_no = ['11290', '12892', '12802', '23489']
   date = ['2/3/19', '12/30/17', '04/21/2018', '8/12/17', '12/21/18']
   for i in range (0, len(invoice_no)):
       proc = subprocess.Popen(['java', '-jar', '/data/python/xyz.jar', invoice_no[i], date[i], amount[i]],stdin=PIPE,stdout=PIPE, stderr=PIPE)
       output = proc.communicate()[0] ## this will capture the output of script called in the parent script.

【讨论】：