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class AttachmentType

Maturity: 27

A simple enumeration-like class that defines constants for different types of attachments in a system.

File:
/tf/active/vicechatdev/SPFCsync/venv/lib64/python3.11/site-packages/office365/outlook/mail/attachments/attachment_type.py
Lines:
1 - 9
Complexity:
simple

Purpose

AttachmentType serves as a namespace for attachment type constants, providing standardized string identifiers for three types of attachments: 'file', 'item', and 'reference'. This class follows a pattern similar to an enumeration, allowing code to reference attachment types using class attributes rather than hardcoded strings, improving code maintainability and reducing errors from typos.

Source Code

class AttachmentType:
    def __init__(self):
        pass

    file = "file"

    item = "item"

    reference = "reference"

Parameters

Name Type Default Kind
bases - -

Parameter Details

self: Standard instance reference in __init__, though no instance variables are set. The class is designed to be used via class attributes rather than instances.

Return Value

Instantiation returns an AttachmentType object, though the class is typically used by accessing its class attributes directly (AttachmentType.file, AttachmentType.item, AttachmentType.reference) rather than creating instances. The class attributes return string values: 'file', 'item', or 'reference'.

Class Interface

Methods

__init__(self)

Purpose: Constructor that initializes an AttachmentType instance, though it performs no operations

Parameters:

  • self: Instance reference

Returns: None (implicit). Creates an AttachmentType instance.

Attributes

Name Type Description Scope
file str String constant 'file' representing a file-type attachment class
item str String constant 'item' representing an item-type attachment class
reference str String constant 'reference' representing a reference-type attachment class

Usage Example

# Typical usage - accessing class attributes directly without instantiation
attachment_type = AttachmentType.file
print(attachment_type)  # Output: 'file'

# Using in conditional logic
if attachment_type == AttachmentType.file:
    print("Processing file attachment")

# Using in function parameters
def process_attachment(attachment_type):
    if attachment_type == AttachmentType.item:
        return "Processing item"
    elif attachment_type == AttachmentType.reference:
        return "Processing reference"
    return "Processing file"

result = process_attachment(AttachmentType.reference)

# Less common - creating an instance (not necessary for typical usage)
instance = AttachmentType()
print(instance.file)  # Output: 'file'

Best Practices

  • Use class attributes directly (AttachmentType.file) rather than creating instances, as the class is designed as a constant namespace
  • This pattern is useful for avoiding magic strings in code - always reference AttachmentType.file instead of hardcoding 'file'
  • Consider using Python's enum.Enum for more robust enumeration behavior in production code, as it provides better type safety and IDE support
  • The empty __init__ method suggests this class is not meant to maintain state or be instantiated frequently
  • All three attributes (file, item, reference) are class-level variables, making them accessible without instantiation
  • This class has no side effects and is thread-safe since it only defines immutable string constants

Tags

enumeration constants attachment type-definition namespace configuration string-constants

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