How to do shear transformation Python

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What can i do to get the help i need ?

have a look at remapping

" pixel by pixel." -- that's exactly the opposite, of how it should be done.

calculate the mapping once, re-use for any further image..

that i do not know to do. I'm in this big dilemma, i have to learn opencv and python at the same time, and python is so simpel my mind cant comprehend. Iknow that image shearing is an affine transformation, but how to make an algortihm out of it is getting to me. I'm stuck at the point of not knowing how to od it.

yea, noobs will be noobs. just take your sweet time. but learn, that blindly asking around won't get you anywhere. it's YOUR ellbow grease required here.

Hate it, i have to make the algortihm before 26th okt :D

again,we can't help you with the algorithm, or mend your (lack of) programming skills, sorry for being brutal, hate it

// Shear

    double shear = 2;

    vector_3 vertex0(-0.5,  0.5, 0); // v0  v3
    vector_3 vertex1(-0.5, -0.5, 0); //
    vector_3 vertex2( 0.5, -0.5, 0); //
    vector_3 vertex3( 0.5,  0.5, 0); // v1  v2

    vertex0.x = vertex0.x + shear*vertex0.y;
    vertex1.x = vertex1.x + shear*vertex1.y;
    vertex2.x = vertex2.x + shear*vertex2.y;
    vertex3.x = vertex3.x + shear*vertex3.y;

I do not understand much of that :/ sorry