numpy字符串操作 | rjust()函数

numpy.core.defchararray.rjust(arr, width, fillchar=' ')是另一个在 numpy 中进行字符串操作的函数。它返回一个数组，其中 arr 的元素在长度宽度的字符串中右对齐。它使用fillchr参数填充每个数组元素的剩余空间。如果未传递fillchr ，则用空白空间填充剩余空间。

Parameters:
arr : array_like of str or unicode.Input array.
width : The final width of the each string .
fillchar : The character to fill in remaining space.

Returns : [ndarray] Output right justified array of str or unicode, depending on input type.

代码#1：

# Python program explaining
# numpy.char.rjust() method 
  
# importing numpy 
import numpy as geek
  
# input array  
in_arr = geek.array(['Numpy', 'Python', 'Pandas'])
print ("Input array : ", in_arr) 
  
# setting the width of each string to 8
width = 8
  
# output array when fillchar is not passed
out_arr = geek.char.rjust(in_arr, width)
print ("Output right justified array: ", out_arr) 

输出：

Input array :  ['Numpy' 'Python' 'Pandas']
Output right justified array:  ['   Numpy' '  Python' '  Pandas']

代码#2：

# Python program explaining
# numpy.char.rjust() method 
  
# importing numpy 
import numpy as geek
  
# input array  
in_arr = geek.array(['Numpy', 'Python', 'Pandas'])
print ("Input array : ", in_arr) 
  
# setting the width of each string to 8
width = 8
  
# output array 
out_arr = geek.char.rjust(in_arr, width, fillchar ='*')
print ("Output right justified array: ", out_arr) 

输出：

Input array :  ['Numpy' 'Python' 'Pandas']
Output right justified array:  ['***Numpy' '**Python' '**Pandas']

代码#3：

# Python program explaining
# numpy.char.rjust() method 
  
# importing numpy 
import numpy as geek
  
# input array  
in_arr = geek.array(['1', '11', '111'])
print ("Input array : ", in_arr)
  
# setting the width of each string to 5
width = 5
  
# output array
out_arr = geek.char.rjust(in_arr, width, fillchar ='-')
print ("Output right justified array: ", out_arr) 

输出：

Input array :  ['1' '11' '111']
Output right justified array:  ['----1' '---11' '--111']