NumPy: Replace "PHP" with "Python" in the element of a given array
NumPy String: Exercise-13 with Solution
Write a NumPy program to replace "PHP" with "Python" in the element of a given array.
import numpy as np x = np.array(['PHP Exercises, Practice, Solution'], dtype=np.str) print("\nOriginal Array:") print(x) r = np.char.replace(x, "PHP", "Python") print("\nNew array:") print(r)
(['PHP Exercises, Practice, Solution'], dtype=np.str)
Original Array: ['PHP Exercises, Practice, Solution'] New array: ['Python Exercises, Practice, Solution']
Python Code Editor:
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Previous: Write a NumPy program to make all the elements of a given string a numeric string of 5 digits with zeros on its left.
Next: Write a NumPy program to test equal, not equal, greater equal, greater and less test of all the elements of two given arrays.
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Python: Tips of the Day
Getting the last element of a list:
some_list[-1] is the shortest and most Pythonic.
In fact, you can do much more with this syntax. The some_list[-n] syntax gets the nth-to-last element. So some_list[-1] gets the last element, some_list[-2] gets the second to last, etc, all the way down to some_list[-len(some_list)], which gives you the first element.
You can also set list elements in this way. For instance:
>>> some_list = [1, 2, 3] >>> some_list[-1] = 5 # Set the last element >>> some_list[-2] = 3 # Set the second to last element >>> some_list [1, 3, 5]
Note that getting a list item by index will raise an IndexError if the expected item doesn't exist. This means that some_list[-1] will raise an exception if some_list is empty, because an empty list can't have a last element.
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