Python String Manipulation | Decapitalize First Letter

Introduction

In Python, strings are immutable, meaning that they cannot be changed once they are created. However, there are times when we need to modify a string, such as when we want to decapitalize the first letter. This can be useful when dealing with user input or when formatting strings for display purposes. In this challenge, you will be tasked with writing a function that decapitalizes the first letter of a string.

Skills Graph

%%%%{init: {'theme':'neutral'}}%%%% flowchart RL python(("`Python`")) -.-> python/BasicConceptsGroup(["`Basic Concepts`"]) python(("`Python`")) -.-> python/ControlFlowGroup(["`Control Flow`"]) python(("`Python`")) -.-> python/DataStructuresGroup(["`Data Structures`"]) python(("`Python`")) -.-> python/FunctionsGroup(["`Functions`"]) python/BasicConceptsGroup -.-> python/comments("`Comments`") python/BasicConceptsGroup -.-> python/booleans("`Booleans`") python/ControlFlowGroup -.-> python/conditional_statements("`Conditional Statements`") python/DataStructuresGroup -.-> python/lists("`Lists`") python/DataStructuresGroup -.-> python/tuples("`Tuples`") python/FunctionsGroup -.-> python/function_definition("`Function Definition`") python/FunctionsGroup -.-> python/default_arguments("`Default Arguments`") subgraph Lab Skills python/comments -.-> lab-13616{{"`Decapitalize First Letter in Python`"}} python/booleans -.-> lab-13616{{"`Decapitalize First Letter in Python`"}} python/conditional_statements -.-> lab-13616{{"`Decapitalize First Letter in Python`"}} python/lists -.-> lab-13616{{"`Decapitalize First Letter in Python`"}} python/tuples -.-> lab-13616{{"`Decapitalize First Letter in Python`"}} python/function_definition -.-> lab-13616{{"`Decapitalize First Letter in Python`"}} python/default_arguments -.-> lab-13616{{"`Decapitalize First Letter in Python`"}} end

Decapitalize String

Write a function decapitalize(s, upper_rest = False) that takes a string s and returns a new string with the first letter decapitalized. The function should also have an optional parameter upper_rest that, when set to True, will convert the rest of the string to uppercase.

def decapitalize(s, upper_rest = False): return ''.join([s[:1].lower(), (s[1:].upper() if upper_rest else s[1:])])

decapitalize('FooBar') ## 'fooBar' decapitalize('FooBar', True) ## 'fOOBAR'

Summary

In this challenge, you learned how to decapitalize the first letter of a string in Python. You used list slicing and str.lower() to decapitalize the first letter of the string, and str.join() to combine the lowercase first letter with the rest of the characters. You also learned how to use an optional parameter to convert the rest of the string to uppercase.

Decapitalize First Letter in Python

Introduction

Skills Graph

Decapitalize String

Summary

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