How to Handle Special Characters in SQLalchemy Connection Strings?

Handling Special Characters in Connection Strings for SQLalchemy

When constructing connection strings with SQLalchemy, handling passwords containing special characters can be tricky. If the password includes delimiters like '@' or '/', the connection string parsing may fail.

To address this issue, it's recommended to utilize the URL-encoding technique. This method escapes special characters within the password, allowing it to be properly parsed by the connection string module.

Here's an example demonstrating how to URL-encode the password:

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

password = "p@ss"
encoded_password = quote_plus(password)

connection_string = f"postgresql://user:{encoded_password}@host/database"
engine = create_engine(connection_string)

By URL-encoding the password, the special characters are converted into their escaped representations, such as '@' for '@'. This ensures that the password is interpreted correctly when connecting to the database.

SQLalchemy internally employs this method to escape passwords when converting URL objects into strings. By using the URL-encoding approach, you can create tidy connection strings while accommodating special characters in your password.

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