from ROOT import TCanvas, TPad, TH1D, TLatex, gROOT

gROOT.SetBatch()

canvas = TCanvas("canvas")
canvas.cd()

pad = TPad("pad", "pad", 0.0, 0.0, 1.0, 1.0)
pad.Draw()
pad.cd()

h1_tpl = TH1D("tpl", "tpl", 1, 0.0, 1.0)

h1_tpl.Draw()

tl = TLatex()
tl.SetTextSize(0.1)
tl.SetNDC()  
tl.DrawLatex(0.2, 0.6, "\sqrt{s} = 8 TeV")
tl.DrawLatex(0.2, 0.4, "\int L dt = 20.3 \; fb^{-1}")

h1_tpl.SetTitle("PNG")
canvas.SaveAs("MWE.png")
h1_tpl.SetTitle("PDF")
canvas.SaveAs("MWE.pdf")
h1_tpl.SetTitle("EPS")
canvas.SaveAs("MWE.eps")