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mailbox Module¶
The mailbox module provides classes for reading, writing, and manipulating various mailbox formats (mbox, Maildir, MMDF, etc.).
Complexity Reference¶
| Operation | Time | Space | Notes |
|---|---|---|---|
| Open mailbox | Varies | Varies | Depends on mailbox format and indexing |
| Add message | Varies | Varies | Depends on mailbox type and file I/O |
| Iterate messages | O(n) | O(1) | Sequential access |
Working with Mailboxes¶
Reading Mailbox¶
import mailbox
# Open mbox - cost depends on format and file size
mbox = mailbox.mbox('mail.mbox')
# Iterate - O(n)
for key, message in mbox.items():
print(message['Subject'])
print(message.get_payload())
mbox.close()
Adding Messages¶
import mailbox
from email.message import EmailMessage
# Open - cost depends on format and file size
mbox = mailbox.mbox('mail.mbox')
# Create message - O(1)
msg = EmailMessage()
msg['Subject'] = 'Test'
msg.set_content('Hello')
# Add - cost depends on mailbox type and I/O
key = mbox.add(msg)
# Flush to disk - cost depends on pending changes
mbox.flush()
mbox.close()