Sometimes, while working with data, we can have a problem in which we need to remove a particular column, i.e the Kth character from string list. String are immutable, hence removal just means re creating a string without the Kth character. Let’s discuss certain ways in which this task can be performed.
Method #1 : Using list comprehension + list slicing
This is the shorthand that can be used to perform this task. In this we just recreate the required string using slicing and extend logic to each string element in list using list comprehension.
# Python3 code to demonstrate working of# Remove Kth character from strings list# using list comprehension + list slicing # initialize list test_list = ['akash', 'nikhil', 'manjeet', 'akshat'] # printing original list print("The original list : " + str(test_list)) # initialize K K = 3 # Remove Kth character from strings list# using list comprehension + list slicingres = [ele[:K] + ele[K + 1:] for ele in test_list] # printing resultprint("List after removal of Kth character of each string : " + str(res)) |
The original list : ['akash', 'nikhil', 'manjeet', 'akshat'] List after removal of Kth character of each string : ['akah', 'nikil', 'maneet', 'aksat']
Method #2 : Using map() + slicing
This method is similar to above one, only difference is that the extension of logic part to each element of list is done with the help of map().
# Python3 code to demonstrate working of# Remove Kth character from strings list# using list comprehension + list slicing # initialize list test_list = ['akash', 'nikhil', 'manjeet', 'akshat'] # printing original list print("The original list : " + str(test_list)) # initialize K K = 3 # Remove Kth character from strings list# using list comprehension + list slicingres = list(map(lambda ele: ele[ :K] + ele[K + 1 : ], test_list)) # printing resultprint("List after removal of Kth character of each string : " + str(res)) |
The original list : ['akash', 'nikhil', 'manjeet', 'akshat'] List after removal of Kth character of each string : ['akah', 'nikil', 'maneet', 'aksat']
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