大约有 40,000 项符合查询结果（耗时：0.0407秒） [XML]
Django set field value after a form is initialized
...value after the form was submitted, you can use something like:
if form.is_valid():
form.cleaned_data['Email'] = GetEmailString()
Check the referenced docs above for more on using cleaned_data
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...
Cast Object to Generic Type for returning
...> T convertInstanceOfObject(java.lang.Object);
Code:
0: aload_0
1: areturn
2: astore_1
3: aconst_null
4: areturn
Exception table:
from to target type
0 1 2 Class java/lang/ClassCastException
public static void main(java...
Extracting text OpenCV
...s(cv::Mat img)
{
std::vector<cv::Rect> boundRect;
cv::Mat img_gray, img_sobel, img_threshold, element;
cvtColor(img, img_gray, CV_BGR2GRAY);
cv::Sobel(img_gray, img_sobel, CV_8U, 1, 0, 3, 1, 0, cv::BORDER_DEFAULT);
cv::threshold(img_sobel, img_threshold, 0, 255, CV_THRESH_O...
Combining node.js and Python
... s = zerorpc.Server(HelloRPC())
s.bind("tcp://*:4242")
s.run()
if __name__ == "__main__" : main()
And the node.js client:
var zerorpc = require("zerorpc");
var client = new zerorpc.Client();
client.connect("tcp://127.0.0.1:4242");
//calls the method on the python object
client.invoke("h...
Naming returned columns in Pandas aggregate function? [duplicate]
...l() function on the multi-level column to form new labels:
df.columns = ["_".join(x) for x in df.columns.ravel()]
For example:
import pandas as pd
import pandas.rpy.common as com
import numpy as np
data = com.load_data('Loblolly')
print(data.head())
# height age Seed
# 1 4.51 3 3...
NuGet for solutions with multiple projects
...
This sweet deal works for me:
PM> Get-Project -all | where {$_.Name -match "Songhay.Silverlight" -and
$_.Name -notmatch "ApplicationLoader" -and $_.Name -notmatch ".Xml"}
| ForEach-Object {Install-Package MvvmLight -project $_.Name}
...
When should Flask.g be used?
...st without change to code.
The application context is popped after teardown_request is called. (Armin's presentation explains this is because things like creating DB connections are tasks which setup the environment for the request, and should not be handled inside before_request and after_request)
...
Determine the line of code that causes a segmentation fault?
... your current directory. And you can examine it with the command
gdb your_program core_file
The file contains the state of the memory when the program crashed. A core dump can be useful during the deployment of your software.
Make sure your system doesn't set the core dump file size to zero. Y...
Threading pool similar to the multiprocessing Pool?
...urrent.futures.ThreadPoolExecutor, i.e.:
executor = ThreadPoolExecutor(max_workers=10)
a = executor.submit(my_function)
See the docs for more info and examples.
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...
Numpy - add row to array
...m adding on matrix A
1 2 3
4 5 6
with a row
7 8 9
same usage in np.r_
A= [[1, 2, 3], [4, 5, 6]]
np.append(A, [[7, 8, 9]], axis=0)
>> array([[1, 2, 3],
[4, 5, 6],
[7, 8, 9]])
#or
np.r_[A,[[7,8,9]]]
Just to someone's intersted, if you would like to add...