How can I add seconds to a datetime.time object in Python?

Adding Seconds to datetime.time in Python

Adding an integer number of seconds to a datetime.time value in Python is not immediately straightforward. Attempts to add a timedelta or another datetime.time object result in errors.

Naive Approaches

Basic attempts such as:

<code class="python">datetime.time(11, 34, 59) + 3
datetime.time(11, 34, 59) + datetime.timedelta(0, 3)
datetime.time(11, 34, 59) + datetime.time(0, 0, 3)</code>

all fail with type errors.

Manual Conversion

One solution involves converting the datetime.time to seconds, adding the desired seconds, and then reconstructing the datetime.time object:

<code class="python">def add_secs_to_time(timeval, secs_to_add):
    secs = timeval.hour * 3600 + timeval.minute * 60 + timeval.second
    secs += secs_to_add
    return datetime.time(secs // 3600, (secs % 3600) // 60, secs % 60)</code>

Using datetime.datetime

A more convenient method is to use a full datetime.datetime object, setting it to a dummy date and then using the time() method to retrieve just the time value. For example:

<code class="python">a = datetime.datetime(100, 1, 1, 11, 34, 59)
b = a + datetime.timedelta(0, 3)
print(a.time())
print(b.time())</code>

Results in:

11:34:59
11:35:02

Alternatively, you can use:

<code class="python">b = a + datetime.timedelta(seconds=3)</code>

Custom Function

If a custom function is desired, you can define one that utilizes the addSecs method:

<code class="python">import datetime

def addSecs(tm, secs):
    fulldate = datetime.datetime(100, 1, 1, tm.hour, tm.minute, tm.second)
    fulldate = fulldate + datetime.timedelta(seconds=secs)
    return fulldate.time()</code>

This method accepts a datetime.time object and an integer representing the number of seconds to add, returning the modified time.

The above is the detailed content of How can I add seconds to a datetime.time object in Python?. For more information, please follow other related articles on the PHP Chinese website!