Extending builtin classes in python

by

Just subclass the type

>>> class X(str):
...     def my_method(self):
...         return int(self)
...
>>> s = X("Hi Mom")
>>> s.lower()
'hi mom'
>>> s.my_method()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 3, in my_method
ValueError: invalid literal for int() with base 10: 'Hi Mom'

>>> z = X("271828")
>>> z.lower()
'271828'
>>> z.my_method()
271828

More Related Contents:

  1. Python String concatenation with in double quotes [closed]
  2. User input integer list [duplicate]
  3. How to extract numbers from a string in Python?
  4. String comparison in Python: is vs. == [duplicate]
  5. Simpler way to create dictionary of separate variables?
  6. Pandas filtering for multiple substrings in series
  7. What does preceding a string literal with “r” mean? [duplicate]
  8. How do I format a string using a dictionary in python-3.x?
  9. How to split strings into text and number?
  10. Convert floating point number to a certain precision, and then copy to string
  11. Is there a generator version of `string.split()` in Python?
  12. ValueError: could not convert string to float: id
  13. String to Dictionary in Python [duplicate]
  14. Convert hex string to integer in Python
  15. Python string with space and without space at the end and immutability
  16. Time complexity of string concatenation in Python [duplicate]
  17. How to make a string’s content appears on screen as we type on keyboard? [duplicate]
  18. Perform a string operation for every element in a Python list
  19. ValueError: invalid literal for int() with base 10: ‘stop’
  20. Change a string of integers separated by spaces to a list of int
  21. How to remove empty lines with or without whitespace in Python
  22. How to create a list with the characters of a string? [duplicate]
  23. Python: How to check a string for substrings from a list? [duplicate]
  24. How do I put a variable’s value inside a string (interpolate it into the string)?
  25. Pandas read_csv dtype leading zeros
  26. Determine the common prefix of multiple strings
  27. Wrap long lines in Python [duplicate]
  28. How to remove leading and trailing spaces from a string?
  29. Modifying a list while iterating when programming with python [duplicate]
  30. Splitting a math expression string into tokens in Python

Leave a Comment