This paper deals with the modelling of load bearing capacity of bored-pile groups under the vertical eccentric load using Python. In many practical problems, the pile foundations of civil engineering structures (such as bridges, retaining walls, offshore structures) are frequently subjected to eccentric loads. There are two main tasks considered in the present work: (1) a group of equally spaced, identical piles subjected to an external moment vector, and (2) general case of a group of unevenly distributed and dissimilar piles. It is observed that the pile group subjected to vertical eccentric load failed by a cap rotation about the head of a pile and all piles within the group achieve the ultimate axial capacity in compression under the collapse mechanism. Finally, a wind turbine (with 95 m height) having a circular raft (with 16 bored piles, 22 m long, 0.8 m diameter) is modelled in the present work considering typical sub-soil profile (consisting of a deep layer of over consolidated, inorganic silty clay of high plasticity up to a depth of about 15 m with the ground water table 2.0 m from the ground level) and estimated the undrained shear strength in the intermediate layer and in the lower stiff clay. The authors will optimise the pile group under eccentric loading for the cost–benefit analysis.