Issue with ginput and adding points to an exisiting plot

[gaminer]

I am using ginput to plot additional points to an exisiting scatter plot, however when the new points are added the previously set x and y limits change. Attached is the code and visualizations to help explain the issue I am having.

#### CODE ####

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import pandas as pd import matplotlib.pyplot as plt from mpl_toolkits.mplot3d import Axes3D import numpy as np   #### Read CSV File #### mb = pd.read_csv('CuerpoGeologico.csv') topo = pd.read_csv('Superficie.csv')     #### Create Subplots ####   fig = plt.figure()   ax1 = fig.add_subplot(211) ax2 = fig.add_subplot(234) ax3 = fig.add_subplot(235) ax4 = fig.add_subplot(236)   #### PLot Data ####   ax1.scatter(mb.x, mb.y, c = 'blue', s=10) ax2.scatter(mb.x, mb.z, c = 'magenta', s=1) ax3.scatter(mb.y, mb.z, c = 'magenta', s=1) ax4.scatter(mb.x, mb.y, c = 'magenta', s=1)   #### Set Grid ##### ax1.grid()   #### Set Axis Limits and Ticks #### ax1.set_xticks(np.arange(3000, 9000, 1000)) ax1.set_yticks(np.arange(4000, 9000, 1000))   ax2.set_xlim([3000, 8000]) ax2.set_xticks([4000, 6000, 8000]) ax2.set_yticks(np.arange(0, 5000, 1000))   ax3.set_xticks([4000, 6000, 8000]) ax3.set_yticks(np.arange(0, 5000, 1000))   ax4.set_xlim([3000, 8000]) ax4.set_xticks([4000, 6000, 8000]) ax4.set_yticks(np.arange(4000, 9000, 1000))   #### Set Axis Labels #### ax1.set_xlabel('East') ax1.set_ylabel('North')   ax2.set_xlabel('East') ax2.set_ylabel('Elevation')   ax3.set_xlabel('North') ax3.set_ylabel('Elevation')   ax4.set_xlabel('East') ax4.set_ylabel('North')   fig.tight_layout()   #### Select Drillhole Locations ####   collars = plt.ginput(2)   x = [] y = []   for i in collars:               #Create list of x and y coordinates of collars     x.append(i[0])     y.append(i[1])       ax1.scatter(x, y, c='black', marker='x')        #Plot drillhole collars

As you can see after the points are placed in Figure_1b that the plot zooms in and the axis limits change. I would like for the figure to maintain the format of Figure_1a after placing the points with ginput.