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Creating a dynamic choice field
I'm having some trouble trying to understand how to create a dynamic choice field in django. I have a model set up something like:
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How do you create nested dict in Python?
I have 2 CSV files: 'Data' and 'Mapping':
4 Answers
4
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What's the best way to inverse sort in scala?
...e by method sorted with an implicit Ordering, which you may make explicit, and Ordering has a reverse (not the list reverse below)
You can do
list.sorted(theOrdering.reverse)
If the ordering you want to reverse is the implicit ordering, you can get it by implicitly[Ordering[A]] (A the type you'r...
error C2440: “return”: 无法从“const Screen”转换为“Screen &” - C/...
...错代码（例子来自c++ primer 4th）：Screen& Screen::display(std::ostream& os) const{ os << contents...转换丢失限定符。
出错代码（例子来自c++ primer 4th）：
Screen& Screen::display(std::ostream& os) const
{
os << contents << '\n';
return *this;
}
解决...
Google breakpad stackwalker无法加载符号 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... 自动生成：
#!/usr/bin/python
import sys
import getopt
import os
import errno
from os.path import basename
def make_sure_path_exists(path):
try:
os.makedirs(path)
except OSError as exception:
if exception.errno != errno.EEXIST:
raise
de...
动态创建对象的拓展：[url]https://community.kodular.io/t/f-os-dynamic-c...
动态创建对象的拓展：https://community.kodular.io/t/f ... onent-2-2-2/50789/2已添加，待翻译优化
BLE connection error “Connection status was set to OS code 133” - 创...
...我的应用程序的 iPhone 版本从未遇到过这个问题，因为 iOS 似乎会自动协商更大的 MTU 大小。这似乎是个好主意。23 字节的限制不再很有用。
【解决】java.lang.ArrayIndexOutOfBoundsException: length=1; index=-1 a...
...handleMessage(chromium-SystemWebView.apk-default-495156106:208) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loopOnce(Looper.java:201) at android.os.Looper.loop(Looper.java:288) at android.app.ActivityThread.main(ActivityThread.java:8060) at java.lang.reflect.Method.i...
Why is Linux called a monolithic kernel?
...d that Linux is a monolithic kernel. Does monolithic kernel mean compiling and linking the complete kernel code into an executable?
...
How to monitor the memory usage of Node.js?
...
node-memwatch : detect and find memory leaks in Node.JS code.
Check this tutorial Tracking Down Memory Leaks in Node.js
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