<p>Python's datetime module is used to process dates and times. Common operations include: 1. Use datetime.now() to obtain the current time; 2. Use date() or time() to extract the date or time part; 3. Use strftime() to format the output; 4. Use timedelta objects for adding and subtracting time; 5. Use , == and other symbols for time comparison; 6. Use strptime() to convert strings and datetime; 7. Use fromtimestamp() to convert timestamps, pay attention to time zone issues. Mastering these basic methods can address most of the time processing needs. </p> <p><img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/175173959352202.jpg" class="lazy" alt="Handling Date and Time Operations in Python"></p> <p> Processing dates and times is a common requirement in programming, especially in data analysis, logging, or timing tasks. Python provides a variety of ways to manipulate time and dates, the most commonly used is the <code>datetime</code> module. It is comprehensive and easy to use and is suitable for most everyday development scenarios. </p> <img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/175173959471098.jpeg" class="lazy" alt="Handling Date and Time Operations in Python"><h2 id="Get-the-current-time"> Get the current time</h2> <p> Getting the current time and date is one of the most basic operations. You can easily accomplish this using <code>datetime.now()</code> method of the <code>datetime</code> module: </p> <img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/175173959659132.jpeg" class="lazy" alt="Handling Date and Time Operations in Python"><pre class='brush:php;toolbar:false;'> from datetime import datetime now = datetime.now() print("Current time:", now)</pre><p> This method returns a complete time object containing year, month, day, hour, minute, second, and microseconds. If you only need the date or time part, you can use <code>date()</code> and <code>time()</code> methods to extract it respectively:</p><ul><li> <code>now.date()</code> returns the date part (year-month-day)</li><li> <code>now.time()</code> returns the time part (hour: minute: seconds. microseconds)</li></ul><p> If you want to format the output, you can use <code>.strftime()</code> method to customize the format, such as: </p><img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/175173959851287.jpeg" class="lazy" alt="Handling Date and Time Operations in Python" /><pre class='brush:php;toolbar:false;'> print(now.strftime("%Y-%m-%d %H:%M:%S")) # Output example: 2025-04-05 14:30:00</pre><h2 id="Addition-and-subtraction-of-time-and-comparison"> Addition and subtraction of time and comparison</h2><p> Many times we need to add or subtract time, such as calculating the time one hour after an event, or the interval between two times. At this time, you can use the <code>timedelta</code> object:</p><pre class='brush:php;toolbar:false;'> from datetime import timedelta one_hour_later = now timedelta(hours=1) print("One hour later:", one_hour_later)</pre><p> You can also subtract the time difference:</p><pre class='brush:php;toolbar:false;'> time_diff = one_hour_later - now print("Time Difference:", time_diff) # The output is similar: 1:00:00</pre><p> Note that subtracting two <code>datetime</code> objects will result in a <code>timedelta</code> object, indicating the time interval between the two. You can extract the total number of seconds, days and other information from it:</p><ul><li> <code>time_diff.days</code> get the number of days that differ</li><li> <code>time_diff.total_seconds()</code> gets the total number of seconds (including the fractional part)</li></ul><p> The comparison of time is also very intuitive, and you can directly use symbols such as <code><</code> , <code>></code> , <code>==</code> to determine the order.</p><h2 id="Handle-conversions-in-different-time-formats"> Handle conversions in different time formats</h2><p> Sometimes we encounter time data in the form of strings and need to convert it into a <code>datetime</code> object for operation. At this time, you need to use <code>strptime()</code> method:</p><pre class='brush:php;toolbar:false;'> date_str = "2025-04-05 12:00:00" dt = datetime.strptime(date_str, "%Y-%m-%d %H:%M:%S")</pre><p> Conversely, it is also very common to convert <code>datetime</code> objects into strings, and <code>strftime()</code> mentioned above is used to do this.</p><p> If you get a timestamp (such as Unix timestamp) from the API or database, you can also use <code>datetime.fromtimestamp()</code> to convert:</p><pre class='brush:php;toolbar:false;'> timestamp = 1743681600 # Example timestamp dt_from_ts = datetime.fromtimestamp(timestamp)</pre><p> It should be noted that timestamps are usually based on UTC, and <code>fromtimestamp()</code> will be converted based on the system's local time zone by default. If you want to keep it as UTC time, you can add time zone information (requires the <code>zoneinfo</code> module of <code>pytz</code> or Python 3.9).</p> <hr> <p> Basically that's it. By mastering the basic usage of the <code>datetime</code> module, you can meet the needs of most of the time processing. Although it looks simple, it is prone to errors in details, such as time zone problems, format string errors, etc. It is recommended to add more tests to ensure the logic is correct.</p>

The above is the detailed content of Handling Date and Time Operations in Python. For more information, please follow other related articles on the PHP Chinese website!