import numpy as np import matplotlib.pyplot as plt import matplotlib.ticker as ticker fig = plt.figure() ax = fig.add_subplot(111) ax.plot(100*np.random.rand(20)) formatter = ticker.FormatStrFormatter('$%1.2f') ax.yaxis.set_major_formatter(formatter) for tick in ax.yaxis.get_major_ticks(): tick.label1On = False tick.label2On = True tick.label2.set_color('green')