[Term Entry] Userstring Python collection-module

content/python/concepts/collections-module/terms/userstring/userstring.md

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+---
+Title: 'UserString'
+Description: 'A wrapper class for string objects that makes subclassing easier.'
+Subjects:
+  - 'Computer Science'
+  - 'Data Science'
+Tags:
+  - 'Data Types'
+  - 'Strings'
+CatalogContent:
+  - 'learn-python-3'
+  - 'paths/computer-science'
+---
+
+A **`UserString`** is a class in the `collections` module. It is a custom wrapper for string objects, behaving like a string but allowing easier subclassing. Unlike directly subclassing `str`, `UserString` stores its content in the `.data` attribute.
+
+> **Note:** While `UserString` behaves like a string and supports the same operations, some methods return a regular `str` instead of another `UserString`.
+
+## Syntax
+
+```pseudo
+myString = collections.UserString(seq)
+```
+
+- `seq`: It can be anything that can be converted into a `str` or `iterable of characters`, like a [list](https://www.codecademy.com/resources/docs/python/lists) or [tuple](https://www.codecademy.com/resources/docs/python/tuples) of individual characters.
+
+Return value:
+
+- A `UserString` instance, which is an object that contains the content derived from `seq`.
+
+## Example
+
+The following example demonstrates the usage of the `UserString` method:
+
+```py
+from collections import UserString
+
+myString = 'First example of a UserString!'
+customString = UserString(myString)
+print(customString.data)
+```
+
+This is the output of the above code:
+
+```shell
+First example of a UserString!
+```
+
+## Codebyte Example
+
+The following example creates a `UserString` and demonstrates its usage more in detail, along with a subclass that removes vowels:
+
+```codebyte/python
+from collections import UserString
+myString = 'Welcome to Codecademy Docs!'
+customString = UserString(myString)
+print(f"My personal UserString: {customString.data}\n")
+print(f"{customString.upper()}\n")
+print(f"Substring of the first word: {customString[0 : 7]}\n")
+
+class NoVowels(UserString):
+  def __init__(self, seq):
+    # Remove vowels from the string
+    super().__init__(''.join(ch for ch in seq if ch.lower() not in "aeiou"))
+
+s = NoVowels("Hello World")
+print(f"Word without any vowels left: {s}")
+```