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Truffle|xxx Token has not been deployed to detected network (network/artifact mismatch) Description I’m testing one contract today with truffle console, and at the beginning I was running truffle test to test the contract. However, for some reason, I shifted to truffle console method. And I got the error above. Solutions on line I looked up many...

LDA model IndexError: index 4963 is out of bounds for axis 1 with size 4963 Today I’m running a LDA model in order to find the dominant topic in each sentence. for i,row in enumerate(lda_model[corpus_in_address]): for j,(topic_num,prop_topic) in enumerate(row): if j==0: wp = lda_model.show_topic(topic_num...

Truffle version Background Met with one problem today, when using truffle, there are some conflicts with the solc version. Migration.sol pragma solidity >=0.4.21 <0.6.0; Contract_code.sol pragma solidity 0.4.19; solc version 0.4.24 truffle-config.js module.exports = {networks: {development: {host: "127.0.0.1", port: 8545, network_i...

Expecting property name enclosed in double quotes Background In this project, I have to dump json file and open this json file in a loop. At first, I looked up some blogs on the internet, most of them talks about the misuse of quotes and double quotes, I checked my code, I found all of the keys in the dictionary used quotes instead of double q...

CSV问题 背景 需要处理一个10w余行的csv文件，其中存在大量的文本信息，文本信息本身也比较大。有一些粘贴的邮件内容。csv文件是,分割，然而邮件中有大量的,和双引号。 问题描述 　　遇到了一个超级让人头大的问题，csv的行数超过了numbers的限制行数，且表格中存在双引号的使用问题。CSV实际上是用逗号来分隔不同的数据的，但是由于在正常的文本里面存在了双引号，这个双引号会和整个文本的外边引号结合，因此逗号就会暴露在外面。所以需要将单个双引号的使用改成两个双引号。比如： "这是一句话" 要修改成 ""这是一句话"" 　　实际操作表明，用numbers修改挺方便的，就是修改过后会丢个几万行。（最后只会保留65535行）这个时候就想起来了Excel，但是用Excel打开，又出现了大...

crawler connection problem etherscan crawler     I’ve written this crawler to collect some contracts information from etherscan. However, a few months later, I can’t access this website anymore. At first I thought that’s because I’ve got too much information from this website, so I’m banned from this website. However, even if my ip has adjuste...

Mac catalina mysql 问题梳理 首先是maven项目里面的jetty:run无法连接，显示 向上查错，发现是数据库的连接出现了错误。 brew install mysql 经过查错，发现是mysql.server start之后，随即会被关闭。因为某些原因放弃了使用brew install下载的mysql，转到官网下载mysql。 网站安装 mysql显示 从网站上面安装下来的mysql会在系统偏好设置中显示。 在这里面尝试会发现，的确是开启了之后会短暂的连接，随后就会断开 initialize database里面有两个选项 这里面选择了legacy password，因为如果选择strong password的话，在连接workbench的时候会连接不上。 ...