How to Connect to a Database with a Special Character Password in Python Using SQLAlchemy?

Connecting to a Database with a Special Character Password as Part of a Tidy Connection String in Python Using SQLalchemy

SQLAlchemy is a popular Python library for database interaction. When setting up a connection, it's preferred to use a tidy connection string. However, encountering issues with interpreting special characters in the password can be frustrating.

The Encoding Dilemma

To overcome this challenge, it is essential to URL-encode the password portion of the connection string to ensure proper parsing.

Solution using quote_plus

To achieve this, implement the following code:

from urllib.parse import quote_plus
from sqlalchemy.engine import create_engine

# Encode the password
encoded_password = quote_plus("p@ss")

# Construct the connection string
connection_string = "postgres://user:{}@host/database".format(encoded_password)

# Create the engine
engine = create_engine(connection_string)

Behind-the-Scenes Encoding

The underlying SQLAlchemy implementation escapes passwords in the same manner by URL-encoding the password when converting URL instances to strings.

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