numpy 字符串操作| ljust()函数
原文:https://www . geesforgeks . org/numpy-string-operations-ljust-function/
numpy.core.defchararray.ljust(arr, width, fillchar=' ')是 numpy 中做字符串运算的另一个函数。它返回一个数组，arr 的元素在一个长度和宽度的字符串中左对齐。它使用fillchr参数填充每个数组元素的剩余空间。如果fillchr没有通过，那么它用空格填充剩余的空间。
参数: arr : 类似字符串或 unicode 的数组。输入数组。 宽度:每根弦的最终宽度。 fillchar : 要填充剩余空间的字符。
返回:字符串或 unicode 的输出数组，具体取决于输入类型。
代码#1 :
# Python program explaining
# numpy.char.ljust() 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.ljust(in_arr, width)
print ("Output left justified array: ", out_arr)
Output:
Input array : ['Numpy' 'Python' 'Pandas']
Output left justified array: ['Numpy ' 'Python ' 'Pandas ']
代码#2 :
# Python program explaining
# numpy.char.ljust() 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.ljust(in_arr, width, fillchar ='*')
print ("Output left justified array: ", out_arr)
Output:
Input array : ['Numpy' 'Python' 'Pandas']
Output left justified array: ['Numpy***' 'Python**' 'Pandas**']
代码#3 :
# Python program explaining
# numpy.char.ljust() 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.ljust(in_arr, width, fillchar ='-')
print ("Output left justified array: ", out_arr)
Output:
Input array : ['1' '11' '111']
Output left justified array: ['1----' '11---' '111--']
