int b = -a++;
$ yarn start
yarn run v1.3.2
$ yarn run webpack:dev
$ yarn run webpack-dev-server -- --config webpack/webpack.dev.js --progress --inline --profile --port=9060
warning From Yarn 1.0 onwards, scripts don't require "--" for options to be forwarded. In a future version, any explicit "--" will be forwarded as-is to the scripts.
$ node --max_old_space_size=4096 node_modules/webpack-dev-server/bin/webpack-dev-server.js --config webpack/webpack.dev.js --progress --inline --profile --port=9060
module.js:557
throw err;
^
Error: Cannot find module '/Users/andrewcarre/Desktop/familyhomestay/node_modules/webpack-dev-server/bin/webpack-dev-server.js'
at Function.Module._resolveFilename (module.js:555:15)
at Function.Module._load (module.js:482:25)
at Function.Module.runMain (module.js:701:10)
at startup (bootstrap_node.js:193:16)
at bootstrap_node.js:617:3
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
Andrews-MBP:familyhomestay andrewcarre$
有没有办法在python中编写这个表达式？ 如果有任何在python中写这个，那么如何在python中编写它？
答案 0 :(得分：3)
Python中没有++运算符，因此您需要使用多个语句
a = 10
b = -a
a += 1
这实际上并不是什么大不了的事，因为无论如何b = -a++是一件令人困惑的事情。
答案 1 :(得分：2)