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Page 5 of 2107
How to delete consonants from a string in Python?
The consonants are the alphabetic characters that is not a vowel (a, e, i, o, u). In Python, String manipulation is the common task, In this article we will explore how to delete consonants from a string using different approaches, including loops, list comprehensions and regular expression. Using Loop In this approach, we are going to declare the variable assignment with vowels in both upper and lower case and then looping through each character in the string. If the character is vowel or a non-alphabet character we will retrieve them and add to result. Example Let's ...
Read MoreHow to convert date to datetime in Python?
In this article, we will discuss how to convert a date to a datetime object in Python. We use the combine() method from the Date & Time module to combine a date object and a time object into a single datetime object. While the date object represents only the calendar date (year, month, day), sometimes we need the full datetime object that includes time (hour, minute, second) as well. Following are the several ways to achieve this. The syntax of the combine() method is as follows. datetime.combine(date, time) Converting a date object to a datetime Object Using the combine() Method The ...
Read MoreHow to perform arithmetic operations on a date in Python?
Performing arithmetic operations on dates allows us to calculate differences between dates, add or subtract time intervals, or compare one date with another using the datetime module in Python. This article will discuss how to perform several arithmetic operations using the datetime module in Python. Adding and Subtracting Days Using timedelta In the Python datetime module, timedelta is a class that represents the difference or duration between two dates or times. We can use timedelta objects to perform date arithmetic, such as adding or subtracting a certain number of days, weeks, hours, minutes, etc. To add or subtract days, we ...
Read MoreHow to get min, seconds and milliseconds from datetime.now() in Python?
Python's datetime module is used to extract various components of the current date and time, such as minutes, seconds, and even milliseconds. The datetime.now() method defined in the datetime module returns the current local date and time as a datetime object. This object allows us to access its individual components like minute, second, and millisecond. Using Attributes of datetime.now() to Extract Values Here we use the datetime.now() method to get the current minutes, seconds, and milliseconds. The now() function is defined under the datetime module. And retrieve the current minutes, seconds, and milliseconds by using .minute, .second, and .microsecond, respectively. ...
Read MoreHow to subtract Python timedelta from date in Python?
The Python datetime module provides various ways for manipulating dates and times. One of its key features is the timedelta object, which represents duration and also the difference between two dates or times. Subtracting a specific amount of time from a date can be done using timedelta. For example, if we want to find the date a day before today, then we create a timedelta object with days=1 and then subtract it from the current date. Subtracting One Day from Today's Date Using timedelta The basic use case is subtracting a single day from today's date. This can be done ...
Read MoreHow to write a regular expression to match either a or b in Python?
In Python regular expressions, one of the common tasks is matching either one character or another. we can done this easily by using the re module along with the pipe symbol |, which acts as an OR operator. In this article, we’ll explore how to match either 'a' or 'b' in a string using regex. The following are the various methods included. Using re.search() with the | symbol The re.search() combined with the | (OR) symbol allows us to search for multiple patterns within a single string. It returns a match object if any of the patterns are found. The ...
Read MoreWhy do I get different timestamps in python on different machines?
A timestamp represents a specific point in time as a numerical value. It typically measures the number of seconds that have elapsed since the Unix epoch, which is January 1, 1970, at 00:00:00 Coordinated Universal Time (UTC). The main reasons behind timestamp variations on different machines include differences in time zones, system clocks, locale settings, and the use of UTC and local time (such as IST, PST, or CET). In this article, we will explore timestamp differences across different machines by considering the following key factors. Different System Time Zones If each system were set to different time zones like ...
Read MoreHow to convert a datetime string to millisecond UNIX time stamp?
A millisecond UNIX timestamp is a number that shows how many milliseconds have elapsed since the beginning of the Unix epoch, which is January 1, 1970, at 00:00:00 Coordinated Universal Time (UTC) up to the current moment or specified date and time. Instead of counting time in days, hours, or minutes, it counts in milliseconds (1 second = 1000 milliseconds). In Python, the common way to convert a Datetime object to a milliseconds timestamp involves using the strptime() function (to parse a string into a Datetime object), then converting this datetime object into a UNIX timestamp by using the timestamp() method, ...
Read MoreHow to match anything except space and new line using Python regular expression?
Python's re module provides various tools for pattern matching using regular expressions (regex). With the help of regex, we can define flexible patterns that match or exclude particular characters or sequences. In this article, we will focus on how to match everything except spaces and newlines using regular expressions. The following are the methods involved to match the regex pattern, except for space and new line. Using re.findall() Method Using re.split() Method Replace Spaces and Newlines with Empty String Match Words Without Space/Newline Using re.findall() Instead ...
Read MoreHow to compare Python DateTime with Javascript DateTime?
Both Python and JavaScript have unique ways of representing date and time data. To compare Python datetime objects with JavaScript Date objects, we must ensure that both are converted to a common format, such as ISO 8601 strings or Unix timestamps (milliseconds since epoch). The following are two major differences between Python (datetime) and JavaScript (date) objects. Month Representation: JavaScript uses a 0-indexed month (0 for January, 11 for December), while Python uses a 1-indexed month (1 for January, 12 for December). Default Time Zone: Python defaults to UTC, while JavaScript defaults to ...
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