Remove Trailing Characters from Numpy Array Elements

To return a copy of an array with the trailing characters removed, use the numpy.char.rstrip() method in Python Numpy. The "chars" parameter is used to set a string specifying the set of characters to be removed. If omitted or None, the chars argument defaults to removing whitespace. The chars argument is not a prefix; rather, all combinations of its values are stripped.

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

The chars parameter is a string specifying the set of characters to be removed. If omitted or None, the chars argument defaults to removing whitespace. The chars argument is not a suffix; rather, all combinations of its values are stripped.

Steps

At first, import the required library −

import numpy as np

Create a One-Dimensional array of string with some leading and trailing characters −

arr = np.array(['zzzzTomzzzz', 'zzzJohnzzzzz', 'zKatezzz', 'zAmyzzz', 'zBradzzzzzz'])

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)

To return a copy of an array with the trailing characters removed, use the numpy.char.rstrip() method in Python Numpy. The "chars" parameter is used to set a string specifying the set of characters to be removed. If omitted or None, the chars argument defaults to removing whitespace. The chars argument is not a prefix; rather, all combinations of its values are stripped −

print("
Result...
",np.char.rstrip(arr, 'z'))

Example

import numpy as np

# Create a One-Dimensional array of string with some leading and trailing characters
arr = np.array(['zzzzTomzzzz', 'zzzJohnzzzzz', 'zKatezzz', 'zAmyzzz', 'zBradzzzzzz'])

# 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("
Number of elements in the Array...
",arr.size)

# To return a copy of an array with the trailing characters removed, use the numpy.char.rstrip() method in Python Numpy
# The "chars" parameter is used to set a string specifying the set of characters to be removed.
# If omitted or None, the chars argument defaults to removing whitespace.
# The chars argument is not a prefix; rather, all combinations of its values are stripped.
print("
Result...
",np.char.rstrip(arr, 'z'))

Output

Array...
['zzzzTomzzzz' 'zzzJohnzzzzz' 'zKatezzz' 'zAmyzzz' 'zBradzzzzzz']

Array datatype...
<U12

Array Dimensions...
1

Our Array Shape...
(5,)

Number of elements in the Array...
5

Result...
['zzzzTom' 'zzzJohn' 'zKate' 'zAmy' 'zBrad']