Python3-Flask Restful API以重新启动另一个API

我创建了一个python REST web服务，它将执行一系列子流程命令来重新启动另一个python REST web服务。但问题是，在我调用其他REST服务后，它并没有真正启动它

以下是我的REST API代码：

from flask import Flask, jsonify, request, make_response
from flask_restful import fields, reqparse, abort, Api, Resource
import sqlalchemy
from sqlalchemy.sql import table, column, select, update, insert, delete, func
from sqlalchemy.orm import sessionmaker
import requests
import time
import traceback
import subprocess
import os

app = Flask(__name__)
api = Api(app)

class RestartPython(Resource):
    def get(self):

        command1 = 'fuser -k 9876/tcp'
        proc1 = subprocess.Popen(command1, stdin=subprocess.PIPE, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT, shell=True)
        proc1.wait()

        print('kill python process done')

        command2 = 'source activate envpy3'
        proc2 = subprocess.Popen(command2, stdin=subprocess.PIPE, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT, shell=True)
        proc2.wait()

        print('switch python env done')

        command3 = 'python ReceiveCall.py'
        print(command3)
        proc3 = subprocess.Popen(command3, stdin=subprocess.PIPE, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT, shell=True)
        proc3.wait()

        print('ReceiveCall started')

        return make_response(jsonify({'message': 'Python webservice is restarted', 'status': 'Ok'}), 200)

    api.add_resource(RestartPython, '/restart')

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=8082, debug=True)

如果我只运行它而不将它们包装到web服务中，这将起作用

import subprocess

if __name__ == '__main__':
    command1 = 'fuser -k 9876/tcp'
    proc1 = subprocess.Popen(command1, stdin=subprocess.PIPE, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT, shell=True)
    proc1.wait()

    print('kill python process done')

    command2 = 'source activate envpy3'
    proc2 = subprocess.Popen(command2, stdin=subprocess.PIPE, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT, shell=True)
    proc2.wait()

    print('switch python env done')

    command3 = 'python ReceiveCall.py'
    print(command3)
    proc3 = subprocess.Popen(command3, stdin=subprocess.PIPE, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT, shell=True)
    proc3.wait()

    print('ReceiveCall started')

有什么想法吗？

我建议使用communicate（）代替wait（）。无论在何处使用管道，通信都用于避免死锁。让我知道，如果下面的修改为您工作

from flask import Flask, jsonify, request, make_response
from flask_restful import fields, reqparse, abort, Api, Resource
import sqlalchemy
from sqlalchemy.sql import table, column, select, update, insert, delete, func
from sqlalchemy.orm import sessionmaker
import requests
import time
import traceback
import subprocess
from subprocess import PIPE,Popen
import os

app = Flask(__name__)
api = Api(app)

class RestartPython(Resource):
    def get(self):

        command1 = 'fuser -k 9876/tcp'
        proc1 = subprocess.Popen(command1, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
        #proc1.wait()
        (stdout, stderr) = proc1.communicate()

        print '.'.join(stdout)
        print '.'.join(stderr)

        print('kill python process done')

        command2 = 'source activate envpy3'
        proc2 = subprocess.Popen(command2, stdin=subprocess.PIPE, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT, shell=True)
        #proc2.wait()
        proc2.communicate()

        print('switch python env done')

        command3 = 'python ReceiveCall.py'
        print(command3)
        proc3 = subprocess.Popen(command3, stdin=subprocess.PIPE, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT, shell=True)
        #proc3.wait()
         proc3.communicate()

        print('ReceiveCall started')

        return make_response(jsonify({'message': 'Python webservice is restarted', 'status': 'Ok'}), 200)

    api.add_resource(RestartPython, '/restart')

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=8082, debug=True)

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输出是什么，运行每个Popen实例后得到的错误，使用下面的链接获得输出和错误如果我的答案解决了您的问题，您能接受吗？向下投票按钮下方的右勾号您面临的问题是什么以及预期的输出？我希望我的其他REST API在运行后会启动，“ReceiveCall.py”是我的另一个python REST API。如果我运行这些子流程命令而不将其作为web服务调用，它将工作。没有收到您最后的评论“…作为web服务调用”按原样运行代码，我做了一些修改，只是想检查是否调用了子进程Popen