Prior versions relied on .update() or verbose unpacking ( **d1, **d2 ). Python 3.9 introduces native merge ( | ) and update ( |= ) operators:
def process_data(items: list[str]) -> dict[str, int]: return item: len(item) for item in items Use code with caution. The IANA Time Zone Library python 3.9.1 download
Requires local compilation ( ./configure , make , sudo make altinstall ). Step-by-Step Installation Guide 1. Windows Installation Navigate to the official download window for Python 3.9.1. Scroll to the "Files" section at the bottom. Select the . Run the downloaded .exe file. Prior versions relied on
Follow the prompts to agree to the license agreements and complete the installation. compile from source:
Because binary installers are not distributed for Linux on the official site, compile from source: