How to use the time and date modules in Python

<p><img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/887/227/169741507768925.jpg" class="lazy" alt="How to use the time and date modules in Python"></p> <p>How to use the time and date module in Python</p> <p>Introduction:<br>In programming, dealing with time and date are very common tasks. Python provides powerful time and date modules, making time and date operations easier and more convenient. This article will introduce the time and date modules in Python and provide specific code examples to help readers better understand and apply them. </p> <p>1. Introducing the time and date module <br>Python’s built-in time and date module is the <code>datetime</code> module. We need to introduce this module first before we can use its functions and classes. The sample code is as follows: </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>import datetime</pre><div class="contentsignin">Copy after login</div></div><p> 2. Get the current date and time <br> If we want to get the current date and time, we can use <code>datetime</code> in the <code>datetime</code> module The <code>now()</code> method of the class. The sample code is as follows: </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>current_datetime = datetime.datetime.now() print("当前日期和时间：", current_datetime)</pre><div class="contentsignin">Copy after login</div></div><p>The execution result is as follows: </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>当前日期和时间： 2023-01-01 09:00:00</pre><div class="contentsignin">Copy after login</div></div><p>3. Formatted output date and time<br>If we want to output the date and time in a specified format, we can use<code> strftime()</code>method. This method accepts a format string as a parameter and outputs the date and time in the specified format. The following are some commonly used format strings and their meanings: </p><ul><li><code>%Y</code>: year (four digits) </li><li><code>%m</code>: Month (01-12) </li><li><code>%d</code>: Date (01-31) </li><li><code>%H</code>: Hour (00-23) </li><li><code>%M</code>: Minutes (00-59) </li><li><code>%S</code>: Seconds (00-59) </li></ul><p>The sample code is as follows: </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>formatted_datetime = current_datetime.strftime("%Y-%m-%d %H:%M:%S") print("格式化后的日期和时间：", formatted_datetime)</pre><div class="contentsignin">Copy after login</div></div><p>The execution results are as follows: </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>格式化后的日期和时间： 2023-01-01 09:00:00</pre><div class="contentsignin">Copy after login</div></div><p>4. Addition and subtraction of dates and times<br>In Python, we can add and subtract dates and times. The <code>datetime</code> class provides the <code>timedelta</code> class for representing time intervals. We can use the <code>total_seconds()</code> method of the <code>timedelta</code> class to get the total seconds of the time interval, and then perform the corresponding addition and subtraction operations on the date and time. The sample code is as follows: </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>import datetime current_datetime = datetime.datetime.now() print("当前日期和时间：", current_datetime) delta = datetime.timedelta(days=1, hours=2, minutes=30, seconds=30) future_datetime = current_datetime + delta print("加上时间间隔后的日期和时间：", future_datetime) past_datetime = current_datetime - delta print("减去时间间隔后的日期和时间：", past_datetime)</pre><div class="contentsignin">Copy after login</div></div><p>The execution result is as follows: </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>当前日期和时间： 2023-01-01 09:00:00 加上时间间隔后的日期和时间： 2023-01-02 11:30:30 减去时间间隔后的日期和时间： 2022-12-30 06:29:30</pre><div class="contentsignin">Copy after login</div></div><p>5. Comparison of dates and times<br>In Python, we can use comparison operators (such as <code><</code>, <code>></code>, <code>==</code>, etc.) to compare different dates and times. The sample code is as follows: </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>datetime1 = datetime.datetime(2023, 1, 1, 9, 0, 0) datetime2 = datetime.datetime(2024, 1, 1, 9, 0, 0) if datetime1 < datetime2: print("datetime1 在 datetime2 之前") elif datetime1 > datetime2: print("datetime1 在 datetime2 之后") else: print("datetime1 和 datetime2 相等")</pre><div class="contentsignin">Copy after login</div></div><p>The execution results are as follows: </p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>datetime1 在 datetime2 之间</pre><div class="contentsignin">Copy after login</div></div><p>Conclusion: <br>This article introduces how to use the time and date module in Python, including obtaining the current date and time and formatting output Operations such as date and time, addition and subtraction of date and time, and comparison of date and time. Through specific code examples, readers can better understand and apply these functions, making it easier to perform time and date-related programming tasks. Hope this article is helpful to readers. </p>

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