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Python: Remove lowercase substrings from a given string

Python Regular Expression: Exercise-53 with Solution

Write a Python program to remove lowercase substrings from a given string.

Sample Solution:

Python Code:

import re
str1 = 'KDeoALOklOOHserfLoAJSIskdsf'
print("Original string:")
print(str1)
print("After removing lowercase letters, above string becomes:")
remove_lower = lambda text: re.sub('[a-z]', '', text)
result =  remove_lower(str1)
print(result)

Sample Output:

Original string:
KDeoALOklOOHserfLoAJSIskdsf
After removing lowercase letters, above string becomes:
KDALOOOHLAJSI

Flowchart:

Flowchart: Regular Expression -  Remove lowercase substrings from a given string.

Python Code Editor:

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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.

Ref: https://bit.ly/3d8TfFP