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Python argparse mutual exclusive group
...y exclusive.
What you're looking for is subcommands. Instead of prog [ -a xxxx | [-b yyy -c zzz]], you'd have:
prog
command 1
-a: ...
command 2
-b: ...
-c: ...
To invoke with the first set of arguments:
prog command_1 -a xxxx
To invoke with the second set of arguments:
prog...
Possible reasons for timeout when trying to access EC2 instance
...
To connect use ssh like so:
ssh -i keyname.pem username@xxx.xx.xxx.xx
Where keyname.pem is the name of your private key, username is the correct username for your os distribution, and xxx.xx.xxx.xx is the public ip address.
When it times out or fails, check the following:
Sec...
DaffyMenu 扩展：弹出菜单扩展，为组件添加弹出式菜单功能 · App Inventor 2 中文网
... no-repeat; } 文档反馈 切换 目录 在线 客服 扫码添加客服咨询 我要 分享 扫码分享到朋友圈 顶部 var qrcode = new QRCode("qrcode", { ...
Getting Python error “from: can't read /var/mail/Bio”
...
I got same error because I was trying to run on
XXX-Macmini:Python-Project XXX.XXX$ from classDemo import MyClass
from: can't read /var/mail/classDemo
To solve this, type command python and when you get these >>>
then run any python commands
>>>from c...
Removing items from a list [duplicate]
...toRemove = new ArrayList<Object>();
for(Object a: list){
if(a.getXXX().equalsIgnoreCase("AAA")){
toRemove.add(a);
}
}
list.removeAll(toRemove);
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...
pandas dataframe columns scaling with sklearn
...Scaler()
>>> dfTest = pd.DataFrame({'A':[14.00,90.20,90.95,96.27,91.21],
'B':[103.02,107.26,110.35,114.23,114.68],
'C':['big','small','big','small','small']})
>>> dfTest[['A', 'B']] = scaler.fit_transform(dfTest[['A', 'B']])
...
Keyword not supported: “data source” initializing Entity Framework Context
...DefaultConnection" connectionString="Data Source=localhost;Initial Catalog=xxx;Persist Security Info=True;User ID=xxx;Password=xxx" providerName="System.Data.SqlClient" />
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App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎 ...
...-bottom: 0 !important; } 我要 反馈 在线 客服 扫码添加客服咨询 我要 分享 扫码分享到朋友圈 顶部 var qrcode = new QRCode("qrcode", { ...
Logging best practices [closed]
...owing specific codes.
e.g. The first digit can detail the general class: 1xxx can be used for 'Start' operations, 2xxx for normal behaviour, 3xxx for activity tracing, 4xxx for warnings, 5xxx for errors, 8xxx for 'Stop' operations, 9xxx for fatal errors, etc.
The second digit can detail the area, ...
XMLHttpRequest cannot load file. Cross origin requests are only supported for HTTP
...pen a browser
In the address line type: http://your IP address:port
http://xxx.xxx.x.x:1337 or http://xx.xxx.xxx.xx:8000 for the default
If the server is working, you will see a list of your files in the browser
Click the file you want to serve, and it should display.
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