Using Python 3 in virtualenv
Using virtualenv, I run my projects with the default version of Python (2.7). On one project, I need to use Python 3.4.
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How can I quantify difference between two images?
Here’s what I would like to do:
Pandas: convert categories to numbers
Suppose I have a dataframe with countries that goes as:
Can you explain closures (as they relate to Python)?
I’ve been reading a lot about closures and I think I understand them, but without clouding the picture for myself and others, I am hoping someone can explain closures as succinctly and clearly as possible. I’m looking for a simple explanation that might help me understand where and why I would want to use them.
Get list from pandas dataframe column or row?
I have a dataframe df imported from an Excel document like this:
What’s a good rate limiting algorithm?
I could use some pseudo-code, or better, Python. I am trying to implement a rate-limiting queue for a Python IRC bot, and it partially works, but if someone triggers less messages than the limit (e.g., rate limit is 5 messages per 8 seconds, and the person triggers only 4), and the next trigger is over the 8 seconds (e.g., 16 seconds later), the bot sends the message, but the queue becomes full and the bot waits 8 seconds, even though it’s not needed since the 8 second period has lapsed.
Difference between two dates in Python
I have two different dates and I want to know the difference in days between them. The format of the date is YYYY-MM-DD.
plot different color for different categorical levels using matplotlib
I have this data frame diamonds which is composed of variables like (carat, price, color), and I want to draw a scatter plot of price to carat for each color, which means different color has different color in the plot.
Get a filtered list of files in a directory
I am trying to get a list of files in a directory using Python, but I do not want a list of ALL the files.