Fixed mpl import.

pes_to_spec/test/offline_analysis.py

@@ -18,7 +18,7 @@ matplotlib.use('Agg')
 
 import matplotlib.pyplot as plt
 from matplotlib.gridspec import GridSpec
-from mpl_toolkits.axes_grid.inset_locator import InsetPosition
+from mpl_toolkits.axes_grid1.inset_locator import InsetPosition
 import seaborn as sns
 import scipy
 from scipy.signal import fftconvolve