Python: Convert camel case string to snake case string

Last update on March 31 2025 12:58:07 (UTC/GMT +8 hours)

36. Camel to Snake

Write a Python program to convert a camel-case string to a snake-case string.

Sample Solution:

Python Code:

def camel_to_snake(text):
        import re
        str1 = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', text)
        return re.sub('([a-z0-9])([A-Z])', r'\1_\2', str1).lower()

print(camel_to_snake('PythonExercises'))

Sample Output:

python_exercises                                                                                              

Pictorial Presentation:

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to convert a camelCase string to snake_case using regex.
• Write a Python script to transform a camelCase identifier into snake_case and then print the result.
• Write a Python program to process multiple camelCase strings and convert each to snake_case.
• Write a Python function to detect camelCase strings in a list and convert them to snake_case.

Python Code Editor:

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