first, apollo starts normally python code, very simple: import time import paho.mqtt.client as mqtt def on_connect(client, userdata, flags, rc): print("Connected with result code " + str(rc)) if __name__ == "__main__": ...
python Code import os import os.path import time import paho.mqtt.client as mqtt import csv import json def ParsFile(filename): file_object = open(filename) try: if os.path.splitext(filename)[1]==".txt": for line ...
< H2 > background < H2 > nodejs as server rely on mqtt package [1]: https: www.npmjs.com package. start mqtt service the main implementation code is as follows: var mqtt = require( mqtt ); var mqttc = {} var options = { host: "127.0....
in the project built by vue, use the apollo package to do the graphql query. You want to add the request header. The document looks like this: let apollo: ApolloClient = { let configuration = URLSessionConfiguration.default Add additional header...
when my project was on the update line a few days ago, there were 4 errors in the production environment. It was strange that there were no errors in the development environment, and then I began to jump into the pit and debug to find the reason. this...
my directory structure is like this db.pymodelsmodels.py: :django.core.exceptions.ImproperlyConfigured: Requested setting INSTALLED_APPS, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call se...
problem description] there are n students who enter student data (including student number, name, grade) from the keyboard. When the student number is negative, it represents the end of the input. The student data is sorted from high to low, and the sor...
problem description there is no reaction when you want to create a project, npm start with electron-quick-start. I didn t see helloworld s window. But the background process has jumped out. the platform version of the problem and what methods you ...
Not under window, not under o object, not under F1, under which object is method f2? ...