如何在計算圖像小波時限制numpy陣列的打印輸出？

Question

此代碼從圖像小波到控制檯打印出一串無窮無盡的數字。我需要限制輸出到前50或100個項目。我試圖做到這一點，但沒有得到我所需要的。

def waveletdbbiorone(self):  #function for Wavelets computation 
      for filename in glob.iglob ('*.tif'): 
      imgwbior = mahotas.imread (filename) #read the image 
      arraywbior = numpy.array([imgwbior])#make an array 
      coefwbior = pywt.wavedec(arraywbior,'db1')#compute wavelet coefficients 
      arr = numpy.array([coefwbior]) 
      np.set_printoptions(threshold=3) 
      # print arr 
      for elem in arr.flat: 
       print('{}\t'.format(elem)) #, end ='') #print out the result 

Answer 1

嘗試這樣：

for i in range(min(50, len(arr.flat))): 
    elem = arr.flat[i] 
    print('{}\t'.format(elem)) 

可以縮短爲：

for i in range(min(50, len(arr.flat))): 
    print('{}\t'.format(arr.flat[i])) 

編輯：

或者，由Jaime，將更多Python的建議：

for elem in arr.flat[:50]: 
    print('{}\t'.format(elem))