  Asteroseismology is well-established in astronomy as the gold standard for
determining precise and accurate fundamental stellar properties like masses,
radii, and ages. Several tools have been developed for asteroseismic analyses
but many of them are closed-source and therefore not accessible to the general
astronomy community. Here we present $\texttt{pySYD}$, a Python package for
detecting solar-like oscillations and measuring global asteroseismic
parameters. $\texttt{pySYD}$ was adapted from the IDL-based $\texttt{SYD}$
pipeline, which was extensively used to measure asteroseismic parameters for
$\textit{Kepler}$ stars. $\texttt{pySYD}$ was developed using the same
well-tested methodology and comes with several new improvements to provide
accessible and reproducible results. Well-documented, open-source
asteroseismology software that has been benchmarked against closed-source tools
are critical to ensure the reproducibility of legacy results from the
$\textit{Kepler}$ mission. Moreover, $\texttt{pySYD}$ will also be a promising
tool for the broader astronomy community to analyze current and forthcoming
data from the NASA TESS mission.
