How to write Strategy Pattern in Python differently than example in Wikipedia?
In the 2009 Wikipedia entry for the Strategy Pattern, there’s a example written in PHP.
python
Find out how many times a regex matches in a string in Python
Is there a way that I can find out how many matches of a regex are in a string in Python? For example, if I have the string "It actually happened when it acted out of turn."
search by ObjectId in mongodb with pymongo
I need to search an ObjectId with python using pymongo but I always get this error. Any ideas how to search?
Why does a space affect the identity comparison of equal strings?
I’ve noticed that adding a space to identical strings makes them compare unequal using is, while the non-space versions compare equal. a = 'abc' b = 'abc' a is b #outputs: True a = 'abc abc' b = 'abc abc' a is b #outputs: False I have read this question about comparing strings with == … Read more
floating point in python gives a wrong answer
I calculated the following: >>> float(10.0-9.2) 0.800000000000000*7* even doing 10.0-9.2 gave the above result. Why is the extra 7 coming in the result? I’m on python 3.2. Answers: Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them … Read more
Pandas: resample timeseries with groupby
Given the below pandas DataFrame:
Printing a list separated with commas, without a trailing comma
I am writing a piece of code that should output a list of items separated with a comma. The list is generated with a for loop:
pygame platformer – How can I make the bottom solid?
So I was making a pygame platformer and I got stuck on one thing. I coudn’t find a way to make the bottom of my platforms solid. The player could land on the top of it but when it tries to go through the bottom it bounces back down. I tried this but it didnt work:
Making a python iterator go backwards?
Is there anyway to make a python list iterator to go backwards?
How to find children of nodes using BeautifulSoup
I want to get all the <a> tags which are children of <li>: