NumPy中重复一个字符串数组的所有元素

让我们看看如何将给定的字符串数组的所有元素重复3次。

示例 :

输入 : [‘Akash’, ‘Rohit’, ‘Ayush’, ‘Dhruv’, ‘Radhika’]
输出 : [‘AkashAkash’, ‘RohitRohit’, ‘AyushAyush’, ‘DhruvDhruv’, ‘RadvikaRadhikaRadhika’]

我们将使用numpy.char.multiply(a, i)方法完成这项任务。

numpy.char.multiply(a, i)

语法: numpy.char.multiply(a, i)

参数:

a : str或unicode的数组
i : 要重复的次数

返回：字符串的数组

例子1：重复3次。

# importing the module
import numpy as np
  
# created array of strings
arr = np.array(['Akash', 'Rohit', 'Ayush', 
                'Dhruv', 'Radhika'], dtype = np.str)
print("Original Array :")
print(arr)
  
# with the help of np.char.multiply()
# repeating the characters 3 times
new_array = np.char.multiply(arr, 3)
print("\nNew array :")
print(new_array)

输出 :

Original Array :
[‘Akash’ ‘Rohit’ ‘Ayush’ ‘Dhruv’ ‘Radhika’]

New array :
[‘AkashAkashAkash’ ‘RohitRohitRohit’ ‘AyushAyushAyush’ ‘DhruvDhruvDhruv’ ‘RadhikaRadhikaRadhika’]

例子2：重复2次。

# importing the module
import numpy as np
  
# created array of strings
arr = np.array(['Geeks', 'for', 'Geeks'])
print("Original Array :")
print(arr)
  
# with the help of np.char.multiply()
# repeating the characters 3 times
new_array = np.char.multiply(arr, 2)
print("\nNew array :")
print(new_array)

输出 :

Original Array :
['Geeks' 'for' 'Geeks']

New array :
['GeeksGeeks' 'forfor' 'GeeksGeeks']