python读写

from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
import numpy as np
 
 

fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')

n = 100
x=[]
y=[]
z=[]
# For each set of style and range settings, plot n random points in the box
# defined by x in [23, 32], y in [0, 100], z in [zlow, zhigh].

with open('KeyFrameTrajectory.txt') as file:
         for line in file:
                 tmp=line.split()
            x.append(tmp[1])
            y.append(tmp[2])
            z.append(tmp[3])
x = [ float( x ) for x in x if x ]  
y = [ float( y ) for y in y if y ]  
z = [ float( z ) for z in z if z ]        
fig=plt.figure()  
ax=Axes3D(fig)  
ax.scatter3D(x, y, z)  
ax.set_xlabel('x')  
ax.set_ylabel('y')  
ax.set_zlabel('z')  
plt.show()