import matplotlib as mpl
mpl.use("pgf")
pgf_with_pdflatex = {
    "pgf.texsystem": "pdflatex",
    "pgf.preamble": [
         r"usepackage[utf8x]{inputenc}",
         r"usepackage[T1]{fontenc}",
         #r"usepackage{cmbright}",
         ]
}

begin{figure}
    begin{center}
        input{Figures/pompage_pCav.pgf}
    end{center}
    caption{test}
    label{test}
end{figure}