Return element-wise string multiple concatenation in Numpy



To return element-wise string multiple concatenation, use the numpy.char.multiply() method in Python Numpy. The function multiply() returns the output array of string_ or unicode_, depending on input types.

The numpy.char module provides a set of vectorized string operations for arrays of type numpy.str_ or numpy.bytes_.

Steps

At first, import the required library −

import numpy as np

Create a One-Dimensional array of string −

arr = np.array(['Bella', 'Tom', 'John', 'Kate', 'Amy', 'Brad'])

Displaying our array −

print("Array...
",arr)

Get the datatype −

print("
Array datatype...
",arr.dtype)

Get the dimensions of the Array −

print("
Array Dimensions...
",arr.ndim)

Get the shape of the Array −

print("
Our Array Shape...
",arr.shape)

Get the number of elements of the Array −

print("
Elements in the Array...
",arr.size)

The value of i is the number of times to repeat the string −

i = 4

To return element-wise string multiple concatenation, use the numpy.char.multiply() method. The arr1 and arr2 are out two input string arrays −

print("
Result...
",np.char.multiply(arr,i))

Example

import numpy as np

# Create a One-Dimensional array of string
arr = np.array(['Bella', 'Tom', 'John', 'Kate', 'Amy', 'Brad'])

# Displaying our array
print("Array...
",arr) # Get the datatype print("
Array datatype...
",arr.dtype) # Get the dimensions of the Array print("
Array Dimensions...
",arr.ndim) # Get the shape of the Array print("
Our Array Shape...
",arr.shape) # Get the number of elements of the Array print("
Elements in the Array...
",arr.size) # The value of i is the number of times to repeat the string i = 4 # To return element-wise string multiple concatenation, use the numpy.char.multiply() method in Python Numpy # The arr1 and arr2 are out two input string arrays print("
Result...
",np.char.multiply(arr,i))

Output

$python3 main.py
Array...
['Bella' 'Tom' 'John' 'Kate' 'Amy' 'Brad']

Array datatype...
<U5

Array Dimensions...
1

Our Array Shape...
(6,)

Elements in the Array...
6

Result...
['BellaBellaBellaBella' 'TomTomTomTom' 'JohnJohnJohnJohn'
'KateKateKateKate' 'AmyAmyAmyAmy' 'BradBradBradBrad']

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