Compare and return True if two string arrays are equal in Numpy

To compare and return True if two string arrays are equal, use the numpy.char.equal() method in Python Numpy. The arr1 and arr2 are the two input string arrays of the same shape. Unlike numpy.equal, this comparison is performed by first stripping whitespace characters from the end of the string. This behavior is provided for backward-compatibility with numarray

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 two One-Dimensional arrays of string −

arr1 = np.array(['Bella', 'Tom', 'John', 'Kate', 'Amy', 'Brad'])
arr2 = np.array(['Cio', 'Tom', 'Cena', 'Kate', 'Adams', 'brad'])

Display the arrays −

print("Array 1...\n", arr1)
print("\nArray 2...\n", arr2)

Get the type of the arrays −

print("\nOur Array 1 type...\n", arr1.dtype)
print("\nOur Array 2 type...\n", arr2.dtype)

Get the dimensions of the Arrays −

print("\nOur Array 1 Dimensions...\n",arr1.ndim)
print("\nOur Array 2 Dimensions...\n",arr2.ndim)

Get the shape of the Arrays −

print("\nOur Array 1 Shape...\n",arr1.shape)
print("\nOur Array 2 Shape...\n",arr2.shape)

To compare and return True if two string arrays are equal, use the numpy.char.equal() method. The arr1 and arr2 are the two input string arrays of the same shape −

print("\nResult...\n",np.char.equal(arr1,arr2))

Example

import numpy as np

# Create two One-Dimensional arrays of string
arr1 = np.array(['Bella', 'Tom', 'John', 'Kate', 'Amy', 'Brad'])
arr2 = np.array(['Cio', 'Tom', 'Cena', 'Kate', 'Adams', 'brad'])

# Display the arrays
print("Array 1...\n", arr1)
print("\nArray 2...\n", arr2)

# Get the type of the arrays
print("\nOur Array 1 type...\n", arr1.dtype)
print("\nOur Array 2 type...\n", arr2.dtype)

# Get the dimensions of the Arrays
print("\nOur Array 1 Dimensions...\n",arr1.ndim)
print("\nOur Array 2 Dimensions...\n",arr2.ndim)

# Get the shape of the Arrays
print("\nOur Array 1 Shape...\n",arr1.shape)
print("\nOur Array 2 Shape...\n",arr2.shape)

# To compare and return True if two string arrays are equal, use the numpy.char.equal() method in Python Numpy
# The arr1 and arr2 are the two input string arrays of the same shape.
print("\nResult...\n",np.char.equal(arr1,arr2))

Output

Array 1...
['Bella' 'Tom' 'John' 'Kate' 'Amy' 'Brad']

Array 2...
['Cio' 'Tom' 'Cena' 'Kate' 'Adams' 'brad']

Our Array 1 type...
<U5

Our Array 2 type...
<U5

Our Array 1 Dimensions...
1

Our Array 2 Dimensions...
1

Our Array 1 Shape...
(6,)

Our Array 2 Shape...
(6,)

Result...
[False True False True False False]

AmitDiwan

Updated on 22-Feb-2022 06:36:55

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