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We perform a pipeline based on python language to make the   lensing analysis. Its detects and classifies the sources, determines the \textit{Point Spread Function} (henceforth PSF) at the position of every object, measures the shape of the galaxies accounting for the PSF deformation, selects the background galaxies and computes the shear profile. \\  In order to check the pipeline funcionality, we apply it to the \textit{DES Cluster Simulation} images, publically available (Gill et al. 2009).\\  The steps in the weak lensing analysis and the results of the aplication of it to the simulated data, are described in the next subsections.