I notice there might be a misunderstanding in your question. In Prefect 3.x,

scheduled_start_time

is actually an attribute, not a method, so you would access it as

flow_run.scheduled_start_time

rather than calling

flow_run.get_scheduled_start_time()

. The

scheduled_start_time

is typically returned as an ISO-formatted string. To convert it to a Python datetime object, you can use one of these approaches:

python
from datetime import datetime
from dateutil import parser

# Option 1: Using datetime.fromisoformat()
datetime_obj = datetime.fromisoformat(flow_run.scheduled_start_time)

# Option 2: Using dateutil parser (more flexible)
datetime_obj = parser.parse(flow_run.scheduled_start_time)

The

dateutil.parser

approach is more flexible and can handle various datetime string formats, while

datetime.fromisoformat()

is built into Python's standard library but expects specifically formatted ISO strings. If you're seeing a different return type or getting any errors with these conversions, please let me know what type you're actually getting (you can check with

print(type(flow_run.scheduled_start_time))

) and I can provide more specific guidance.