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Why does Python remap my attribute name?


Why does Python remap my attribute name?

By : SGTSnickers
Date : October 16 2020, 03:08 PM
this one helps. It has to do with mangling, something python's interpreter does. Here's an article about it.
https://shahriar.svbtle.com/underscores-in-python
code :


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How can I remap an ActiveRecord attribute into a foreign key with a minimum of disruption?

How can I remap an ActiveRecord attribute into a foreign key with a minimum of disruption?


By : Luke Schenk
Date : March 29 2020, 07:55 AM
To fix this issue If you just want to fake the fields as if you had a has_one relationship setup in the Price model, you can just define the methods yourself in your Price model. As you didn't give an example of how you select from the Product Struct, the below is a code example if you were trying to re-implement it for an ActiveModel.
code :
def product
    if self.product_id
        if !@product or @product.id != self.product_id
            @product = Product.find(self.product_id)
        else
            @product
        end
    end
end

def product=(product)
    @product = product
    self.product_id = product._id
end
How remap default key in VIM, without affecting the other remap?

How remap default key in VIM, without affecting the other remap?


By : Arunesh Vikram RaZoR
Date : March 29 2020, 07:55 AM
I wish this helpful for you Some other programs have the concept of "key bindings" where there is a list of available internal commands, and then various keys are assigned to trigger these commands. Vim does not work that way. There is no spoon internal command triggered by CTRL-O. What you can do is map ALT-o to CTRL-O.
I am not sure that works for ALT-o on my system, but for the sake of discussion, let's assume that it does on yours. If you were to define
code :
:nnoremap <C-o> :browse confirm e<CR>
:nmap <M-o> <C-O>
:nnoremap <C-o> :browse confirm e<CR>
:nnoremap <M-o> <C-O>
:help :noremap
Python - remap the values according to date

Python - remap the values according to date


By : Oussama Benzita
Date : March 29 2020, 07:55 AM
Does that help I have 3 tsv files with different stock values on a slight different date. I need to compile all 3 stock values into 1 tsv file according to date. The problem is the 3 files have slight different date. For example, , Using pandas, as you have mentioned its a tsv hope it helps:
code :
df1=pd.read_csv('filepath/stock1',sep='\t')
df
Out[31]: 
              0      1
0  23 july 2009  10.03
1  24 july 2009  10.07
2  25 july 2009    NaN
df2=pd.read_csv('filepath/stock2',sep='\t')
df2
Out[42]: 
              0     1
0  23 july 2009   NaN
1  24 july 2009  3.07
2  25 july 2009  3.10

df3=pd.read_csv('filepath/stock3',sep='\t')
df3
Out[43]: 
              0    1
0  23 july 2009  5.4
1  24 july 2009  NaN
2  25 july 2009  5.1
In[56]:df4=df1.merge(df2,on=0,how='left').merge(df3,on=0,how='left').rename(columns={0:'Date','1_x':'Stock1','1_y':'Stock2',1:'Stock3'}).fillna('No value')

df4
Out[57]: 
           Date    Stock1    Stock2    Stock3
0  23 july 2009     10.03  No value       5.4
1  24 july 2009     10.07      3.07  No value
2  25 july 2009  No value       3.1       5.1
Unexpected behaviour when using OpenCV remap in Python

Unexpected behaviour when using OpenCV remap in Python


By : adrian_25
Date : March 29 2020, 07:55 AM
it should still fix some issue I think you misunderstand how remap() works. Let me quote from the OpenCV documentation for the function initUndistortRectifyMap():
"The function actually builds the maps for the inverse mapping algorithm that is used by remap(). That is, for each pixel (u, v) in the destination image, the function computes the corresponding coordinates in the source image."
code :
At x=383,y=0mapping is:199.102
Opencv cuda python remap error cv.cuda.remap(raw, mapx, mapy, cv.INTER_CUBIC, borderMode=cv.COLOR_RGB2GRAY)

Opencv cuda python remap error cv.cuda.remap(raw, mapx, mapy, cv.INTER_CUBIC, borderMode=cv.COLOR_RGB2GRAY)


By : user3629440
Date : March 29 2020, 07:55 AM
I hope this helps you . I have installed opencv '4.2.0 dev' ,an already built package from https://jamesbowley.co.uk/accelerate-opencv-4-2-0-build-with-cuda-and-python-bindings/ (https://jamesbowley.co.uk/downloads/).I'm trying to use cv2.cuda.remap but it's throwing error as below , I Got the Answer!!!
Updated Code :
code :
sz = (1024,1024,3)
npMat = (np.random.random(sz)*255).astype(np.uint8)
cuMat = cv.cuda_GpuMat(npMat)
npMapX = np.random.rand(sz[0],sz[1]).astype('float32')
npMapY = np.random.rand(sz[0],sz[1]).astype('float32')

cuMapX = cv.cuda_GpuMat(npMapX)
cuMapY = cv.cuda_GpuMat(npMapY)
cuDst = cv.cuda_GpuMat(cuMat.size(),cuMat.type())
cv.cuda.remap(cuMat,cuMapX,cuMapY,dst=cuDst,interpolation=cv.INTER_LINEAR)
cuDst = cv.cuda.remap(cuMat,cuMapX,cuMapY, interpolation=cv.INTER_LINEAR)
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