How to Create Timedelta Objects from Textual Strings?

Constructing Timedelta Objects from Simple Strings

When creating a function that requires parsing strings into timedelta objects, you may encounter various input formats such as "32m", "2h32m", "4:13", or "5hr34m56s". To streamline this task, consider leveraging the powerful capabilities of Python's datetime module and its strptime method.

Using datetime.strptime

The elegant solution is to utilize the strptime method to parse the input string based on a specified format:

<code class="python">from datetime import datetime, timedelta

t = datetime.strptime("05:20:25", "%H:%M:%S")
delta = timedelta(hours=t.hour, minutes=t.minute, seconds=t.second)</code>

Breakdown:

• datetime.strptime: Parses the input string ("05:20:25") based on the specified format string ("%H:%M:%S"), which defines the hours, minutes, and seconds respectively.
• timedelta constructor: Creates a timedelta object using the converted hours, minutes, and seconds.

Once the timedelta object is constructed, you can utilize it normally, such as:

<code class="python">print(delta)
assert(5*60*60+20*60+25 == delta.total_seconds())</code>

By harnessing the capabilities of datetime.strptime, you can efficiently parse strings of various formats into timedelta objects, simplifying your function's implementation.

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