n = np.cos(np.pi())#报错 #n = np.cos(np.pi) #先import numpy as np #n = np.cos(math.pi/2) #先import math
n = np.cos(np.pi())#报错 #n = np.cos(np.pi) #先import numpy as np #n = np.cos(math.pi/2) #先import math
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