package

问题 I took this example from a different question. I am building an R package with Rcpp. I have a function like fun1 (below) that I want to put into its own .cpp file. Then I want to call fun1 with other functions (like fun() does below). I want fun1 in a separate file because I am going to call it from several Rcpp functions that are in different .cpp files. Are there certain include statements and things I need to do to make the fun1 function accessible in the .cpp where fun() is located? Thank

问题 If one creates a useful Python package, how/where does one publish/advertise it for other people to use? I've put it on hithub, but even Google does not find it after a few weeks. The package is neat & complete, I made it for my personal use and would be a shame not to share it with others :) 回答1: So, to make the package available to a pip install , you have to register it in the Python Package Index (PyPI): https://pypi.python.org/pypi There's also the test environment, where you can upload

问题 If one creates a useful Python package, how/where does one publish/advertise it for other people to use? I've put it on hithub, but even Google does not find it after a few weeks. The package is neat & complete, I made it for my personal use and would be a shame not to share it with others :) 回答1: So, to make the package available to a pip install , you have to register it in the Python Package Index (PyPI): https://pypi.python.org/pypi There's also the test environment, where you can upload

问题 If one creates a useful Python package, how/where does one publish/advertise it for other people to use? I've put it on hithub, but even Google does not find it after a few weeks. The package is neat & complete, I made it for my personal use and would be a shame not to share it with others :) 回答1: So, to make the package available to a pip install , you have to register it in the Python Package Index (PyPI): https://pypi.python.org/pypi There's also the test environment, where you can upload

问题 I already added connectivity plugin on my pubspec.yaml . connectivity: ^0.4.6 But still getting this error: E/flutter ( 4789): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: MissingPluginException(No implementation found for method check on channel plugins.flutter.io/connectivity) E/flutter ( 4789): #0 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:314:7) E/flutter ( 4789): E/flutter ( 4789): #1 Connectivity.checkConnectivity (package

问题 I already added connectivity plugin on my pubspec.yaml . connectivity: ^0.4.6 But still getting this error: E/flutter ( 4789): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: MissingPluginException(No implementation found for method check on channel plugins.flutter.io/connectivity) E/flutter ( 4789): #0 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:314:7) E/flutter ( 4789): E/flutter ( 4789): #1 Connectivity.checkConnectivity (package

问题 I have been using Jupyter for some time now and it has worked just fine. I have Jupyter and Python installed via Homebrew. I am running on MacOS. Yesterday, I ran the command brew upgrade and now my Jupyter notebook is unable to find any of the installed python packages. I will use Numpy as the example. When inside of a Jupyter notebook, I try to do import numpy I get the message: ModuleNotFoundError: No module named 'numpy' If, however, I launch python in a terminal window, then I can import

问题 This question already has answers here : How does Java decide when to import? (9 answers) Closed 1 year ago . class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); } } In the above example we are using the println method without importing the package of it. So I want to know: What are the packages or classes included automatically? 回答1: Everything in java.lang is imported by default - here you are using java.lang.System and java.lang.String 回答2:

问题 trying to download discord.py using pip install, gave me the error message in the title. I installed using cmd and the commands py -m pip install -U discord, the cmd was also run in admin. tried using pip, pip3, and pip3.9, all of which didnt work. I tried uninstalling/reinstalling/upgrading (in that order) the said libraries: pip yarl multidict wheel setuptools versions of python that I tried (in all versions are downloaded with default settings with nothing changed): python-3.9.0-amd64.exe

问题 trying to download discord.py using pip install, gave me the error message in the title. I installed using cmd and the commands py -m pip install -U discord, the cmd was also run in admin. tried using pip, pip3, and pip3.9, all of which didnt work. I tried uninstalling/reinstalling/upgrading (in that order) the said libraries: pip yarl multidict wheel setuptools versions of python that I tried (in all versions are downloaded with default settings with nothing changed): python-3.9.0-amd64.exe