I have a string. I want to generate all permutations from that string, by changing the order of characters in it. For example, say: what I want is a list like this, Currently I am iterating on the list cast of the string, picking 2 letters randomly and transposing them to form a new string, and adding it to s…
Tag: string
How can I remove duplicate words in a string with Python?
Following example: How can I remove the second two duplicates “calvin” and “klein”? The result should look like only the second duplicates should be removed and the sequence of the words should not be changed! Answer
Python split string in moving window
I have a string with digits like so – digit = “7316717” Now I want to split the string in such a way that the output is a moving window of 3 digits at a time. So I get – [“731”, “316”, “167”, “671”, “717”] How would the approa…
Best way to convert string to bytes in Python 3?
TypeError: ‘str’ does not support the buffer interface suggests two possible methods to convert a string to bytes: Which method is more Pythonic? Answer If you look at the docs for bytes, it points you to bytearray: bytearray([source[, encoding[, errors]]]) Return a new array of bytes. The bytearr…
What is the difference between a string and a byte string?
I am working with a library which returns a “byte string” (bytes) and I need to convert this to a string. Is there actually a difference between those two things? How are they related, and how can I do the conversion? Answer Assuming Python 3 (in Python 2, this difference is a little less well-def…
Joining pairs of elements of a list [duplicate]
This question already has answers here: How to iterate over a list in chunks (39 answers) Closed 8 months ago. I know that a list can be joined to make one long string as in: Obviously this would output: However, what I am trying to do is simply join the first and second strings in the list, then join the
Can you have variables within triple quotes? If so, how?
This is probably a very simple question for some, but it has me stumped. Can you use variables within python’s triple-quotes? In the following example, how do use variables in the text: I would like it to result in: If not what is the best way to handle large chunks of text where you need a couple varia…
Titlecasing a string with exceptions
Is there a standard way in Python to titlecase a string (i.e. words start with uppercase characters, all remaining cased characters have lowercase) but leaving articles like and, in, and of lowercased? Answer There are a few problems with this. If you use split and join, some white space characters will be ig…
Product code looks like abcd2343, how to split by letters and numbers?
I have a list of product codes in a text file, on each line is the product code that looks like: abcd2343 abw34324 abc3243-23A So it is letters followed by numbers and other characters. I want to split on the first occurrence of a number. Answer Or, if you want to split on the first occurrence of a digit: d+
How to insert a character after every 2 characters in a string
Is there a pythonic way to insert an element into every 2nd element in a string? I have a string: ‘aabbccdd’ and I want the end result to be ‘aa-bb-cc-dd’. I am not sure how I would go about doing that. Answer Assume the string’s length is always an even number, The t can also be…