How you can calculate lambda utilizing the ecdsa library?

I do know the components λ = (3 * x2^2) * (2 * y2)^-1 mod p and λ = (y₂ – y₁) * (x₂ – x₁)^-1 mod p, however in actuality its values are corrected by the ecdsa library. Does anybody know the way it works? Possibly there’s a Python code that lets you calculate the λ of any level with utilizing ECDSA library? I imply “import ecdsa” in Python.The formulation of this library shouldn’t differ from the library in C++ (in openssl) I imply that the λ worth can’t be taken instantly by the components (see above) from the coordinates of personal key 1 (for instance). x = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798 y = 0x483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8 However this worth λ= 93198780379987365481681632241956844596827457411394035800182702812288411560889 How? I do know ecdsa use one other methodology.