I want a method, written in Python with the following signature: def validate_and_normalize_timestamp(timestamp: str) -> str: ... that validates that the input timestamp: str is a valid RFC3339 timestamp and outputs a normalized string in the format: YYYY-MM-DDTHH:MM:SS.SSSZ This should support arbitrary precision in the fractional seconds, i.e., S, S.S, S.SS, S.SSS, S.SSSS, and so on. There are multitude of methods in Python, but I am looking for the most simple and robust way. Python's built-in datetime module cannot be used due to lack of support for nanoseconds. And I don't want a data structure output. I want a string. Building a relatively basic regular expression and validation logic can be done, but that would require more work to handle timezones and things that may hope is already handled properly. Continue reading...
