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The Palomar Cosmic Web Imager (PCWI) and Keck Cosmic Web Imager (KCWI) areintegral-field spectrographs on the Hale 5m telescope at Palomar Observatoryand the Keck-2 10m telescope at W. M. Keck Observatory, respectively. In recentyears, these instruments have been increasingly used to conduct survey work; inparticular focused on the circumgalactic and intergalactic media at highredshift. Extracting faint signals from three-dimensional IFU data is a complextask which can become prohibitively difficult for large samples without theproper tools. We present CWITools, a package written in Python3 for theanalysis of PCWI and KCWI data. CWITools is designed to provide a pipelinebetween the output of the standard instrument data reduction pipelines andscientific products such as surface brightness maps, spectra, velocity maps, aswell as a wide array of associated models and measurements. While the packageis designed specifically for PCWI and KCWI data, the package is open source andcan be adapted to accommodate any three-dimensional integral field spectroscopydata. Here, we describe this pipeline, the methodology behind individual stepsand provide example applications.

CWITools: A Python3 Data Analysis Pipeline for the Cosmic Web Imager Instruments