pretty_plots.py

import matplotlib.pyplot as plt
def setdefaults():
  plt.rcParams.update({'font.size': 22})
  plt.rcParams['lines.linewidth'] = 3
  plt.rcParams['text.usetex'] = True
  plt.rcParams['text.latex.unicode'] = True
  plt.rcParams['text.latex.preamble'] = [
         r'\usepackage{siunitx}',   # I need upright \micro symbols, but you need...
         r'\sisetup{detect-all}',   # ...this to force siunitx to actually use your fonts
         r'\usepackage{helvet}',    # set the normal font here
         r'\usepackage{sansmath}',  # load up the sansmath so that math -> helvet
         r'\sansmath'               # <- tricky! -- gotta actually tell tex to use!
  ]