fast_mail_parser

fast_mail_parser is a Python library for .eml files parsing. The main benefit is a performance: the library is much faster than python implementations.

Based on mailparse library using pyo3.

Benchmark

 -------------------------------------------------------------------------------------------- benchmark: 2 tests -------------------------------------------------------------------------------------------
Name (time in ms)                              Min                Max               Mean            StdDev             Median               IQR            Outliers       OPS            Rounds  Iterations
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
test__fast_mail_parser___parse_message      1.8136 (1.0)       1.8938 (1.0)       1.8426 (1.0)      0.0176 (1.0)       1.8465 (1.0)      0.0277 (1.0)         180;0  542.7141 (1.0)         450           1
test__mail_parser___parse_message          14.5583 (8.03)     15.8571 (8.37)     15.0264 (8.16)     0.2368 (13.49)    14.9702 (8.11)     0.2887 (10.42)         5;1   66.5495 (0.12)         32           1
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Legend:
  Outliers: 1 Standard Deviation from Mean; 1.5 IQR (InterQuartile Range) from 1st Quartile and 3rd Quartile.
  OPS: Operations Per Second, computed as 1 / Mean

Installation

Use the package manager pip to install fast_mail_parser.

pip install fast-mail-parser

Usage

import sys
from fast_mail_parser import parse_email, ParseError

with open('message.eml', 'r') as f:
    message_payload = f.read()

try:
    email = parse_email(message_payload)
except ParseError as e:
    print("Failed to parse email: ", e)
    sys.exit(1)

print(email.subject)
print(email.date)
print(email.text_plain)
print(email.text_html)
print(email.headers)

for attachment in email.attachments:
    print(attachment.mimetype)
    print(attachment.content)
    print(attachment.filename)

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.