#(1)add() 对两个数组的元素进行字符串连接
import numpy as np
print(np.char.add(["xiaodu"],["good"]))
print(np.char.add(["xiaodu","dudu"],["good","nice"]))
#output:['xiaodugood'] ['xiaodugood' 'dudunice']
#(2)multiply() 返回按元素多重连接后的字符串
import numpy as np
print(np.char.multiply("good",3))
#output:goodgoodgood