23 guides filed under this subject.
How do you remove leading zeroes in Python formatted dates? I have been sending data through to a Suitescript API endpoint and have received the error that the date information I am sending through needs to be of the format D/M/YYYY , here’s the error specifically: Currently, the way the date is formatted and sent from my Python code is as follows: The f-string enables me to construct the date…
Read guideHow do you remove a newline character \n from a string in Python? The easiest way to remove a new line from a string in Python is by using the string method .replace() . Another way is to use the string method .strip() if the new line is at the start or end of the string. Here are some examples demonstrating how to remove the new line characters: As you…
Read guideHow do you create a file name with an incrementing number in Python? To create an incrementing file name in Python, run a while loop that checks the existence of a file, and if it exists, use Regex to modify the file name by replacing the integer at the end of the file with the next number. Continue looping until the file name does not exist in the destination folder.…
Read guideHow do you format time to be in 24-hours using Python? In Python you can format a datetime object to be displayed in 24-hour time using the format %H:%M . This is not to be confused with the 12-hour time which uses the format %I:%M and may have %p appended to the end to denote AM/PM . Here’s an example demonstrating the conversion of time from 12-hour format to a…
Read guideHow do you format a string in the format of HH:MM AM/PM to 24-hour time in Python? To change a string in the format HH:MM AM/PM to 24-hour time in Python use the datetime.datetime.strptime(original string, format string) function located in the datetime library. As the datetime class needs to be imported from the datetime library you need to make sure you include the reference twice, otherwise you may get strptime…
Read guideHow do you convert a string in the format of DD/MM/YY to a date in Python? To convert a string in the format of DD/MM/YY to a date in Python import the datetime library and use the datetime.datetime.strptime(date string, format string) function (yes, that is not a typo the datetime library has a datetime class and it contains the strptime function). To make it easier to access the strptime() function…
Read guideHow do you remove a trailing slash in a string using Python? There are two popular ways to remove a trailing slash from a string in Python. The most common approach is to use the .rstrip() string method which will remove all consecutive trailing slashes at the end of a string. If you only need to remove one trailing slash the string slice operator can be another alternative. Here’s how…
Read guideHow do you convert a list of strings to a list of integers in Python? And can you do it with one line of code? To convert a list of strings to a list of integers use the built-in map() function if you know the contents of the original list will all convert to integers, otherwise use a lambda function in your map() , or use a list comprehension with…
Read guideWhat are the most common string operators used in Python and why they’re essential to know? It doesn’t take long when you begin programming in Python to work with strings and to start modifying these strings by using common operators. Here I’ll look at 5 of the most common string operators I use in my own Python code and how you can use them in your own code. String Concatenation…
Read guideHow do you remove the file extension from a path in Python? And can you do it using just one line of code? The file extension is generally the last set of characters after the final period in a path string. Removing the file extension helps with trying to either rename the file name or with renaming the file extension. For example, if my full path string to a particular…
Read guideWhat does [:-1] in Python actually do and why would you want to use it? [:-1] in Python is a slice operation used on strings or lists and captures all contents of the string or list except for the last character or element . Here are some examples demonstrating the operation of this code with strings: As you can see from the simple code example above a variable my string…
Read guideLearn what a single asterisk before a Python variable means in unpacking, function calls, starred assignment and *args parameters.
Read guideGet the first or last N characters of a Python string with text[:n] and text[-n:], including zero, oversized and combined slices.
Read guideHow do you convert a string representing a percentage number into an actual number that can be used to perform calculations? To convert a string represented as a percentage number into an actual decimal number in Python use the built-in float() function after removing the percent symbol from the string and any other characters that prevent numeric conversion. Without purging from the original string the percent symbol you will get…
Read guideCheck whether a Python string is a valid integer using int(), try and except, or string methods, including signs and surrounding whitespace.
Read guideHow do you split a string into two equal halves using Python? To tackle this exercise you need to know how you’re going to operate on odd numbered string lengths. For example, how would you like your code to operate on the string halve . As it has 5 characters you’re going to have 5 possible solutions: hal and ve OR ha and lve ha, l and ve halve OR…
Read guideHow do you get a string to be all lowercase in Python? Thankfully there’s a built-in method that doesn’t require importing any external libraries to get a string to lower case, here’s how you do it. To get a string to all lowercase, use the built-in string method .lower() , which turns all characters in the string variable to lower case. Here is an example demonstrating the transformation of a…
Read guideIs there a quick and easy way to get the first character from a string in Python? Yes, there is using the slice operator. To get the first character in a string simply use the code my string[0] where my\ string is a variable containing the string and the slice operator [0] captures the first index of that string, being the first character. Index numbers start at 0 from the…
Read guideHow do you get the last character from a string using Python? Thankfully Python has an easy way to fetch the last character from a string using the slice operator . To get the last character of the string in Python use the syntax my string[-1] . The square brackets are used to indicate a specific character by index number, and as string data types can be iterated, you can…
Read guideHow can you remove the first and last characters from a string easily in Python? Can it be done using just one line of code? To remove the first and last characters from a string in Python use the slice operator on the string to return the needed characters, for example, my string[1:-1] . Here is an example demonstrating the technique: Slice Notation: How Does It Work? The powerful slice…
Read guideHow can you check if a string is empty in Python? To determine if a string is empty in Python use of the following three means available: see if the string has any length by using the built-in len() function, do a direct comparison using the expression == "" or convert the string to a boolean data type and if the result is false it is an empty string. Let’s…
Read guidePrint a tab character in Python with the \t escape sequence, align multiple values, show a literal \t, and use tabs safely in f-strings.
Read guideHow can you check if a word is found in a string using Python? Recently, I had an issue where I wanted to exclude strings from a list if they contained a certain word. I thought I could use the following common code familiar to most using Python: But the problem ended up being a little more difficult than that. For example, what if you want to exclude the term…
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