【python】if range1_start and range1_end: 是判断”“ 还是none

都会检查

The condition if range1_start and range1_end: checks for both empty strings and None values. In Python, both empty strings ("") and None are considered falsy values.

This means:

• If range1_start or range1_end is an empty string (""), the condition will evaluate to False
• If range1_start or range1_end is None, the condition will also evaluate to False

So your code correctly handles both cases - it will skip adding a range when either the start or end time is an empty string or None.

Looking at your current code, you’re setting:

range1_start = ""
range1_end = ""

With these empty string values, the first range won’t be included in the merged_ranges result, and only the second range (with values “01:20.92” and “02:00.76”) will be processed.