I’m having trouble with this CodingBat problem: Given an int array length 2, return True if it contains a 2 or a 3. I’ve tried two different ways to solve this. Can anyone explain what I’m doing wrong? Answer Your first one doesn’t work because the for loop in Python isn’t the sa…
Tag: python
How to inspect and cancel Celery tasks by task name
I’m using Celery (3.0.15) with Redis as a broker. Is there a straightforward way to query the number of tasks with a given name that exist in a Celery queue? And, as a followup, is there a way to cancel all tasks with a given name that exist in a Celery queue? I’ve been through the Monitoring and …
How to include the symbol “{” in a Python format string?
How can I include { symbol in a string? My string I’m getting the error: I have escaped the { symbol and have tried without escaping too. I’m getting the same error in both cases. Answer Format strings contain “replacement fields” surrounded by curly braces {}. Anything that is not contained in br…
How can I check if character in a string is a letter? (Python)
I know about islower and isupper, but can you check whether or not that character is a letter? For Example: Is there any way to just ask if it is a character besides doing .islower() or .isupper()? Answer You can use str.isalpha(). For example: Output:
Ensamble methods with scikit-learn
Is there any way to combine different classifiers into one in sklearn? I find sklearn.ensamble package. It contains different models, like AdaBoost and RandofForest, but they use decision trees under the hood and I want to use different methods, like SVM and Logistic regression. Is it possible with sklearn? A…
How do I add these headers to my python urllib opener?
opener.addHeaders(headers)? Answer Something like this may work:
no module named pylab on windows
I faced this issue yesterday. I saw the following questions: No module named pylab python error: no module named pylab Both of the above questions gave instructions for Linux and not for Windows machines. The Problem I have heard about the pylab package for plotting in python. I opened the shell and tried thi…
Pandas ‘count(distinct)’ equivalent
I am using Pandas as a database substitute as I have multiple databases (Oracle, SQL Server, etc.), and I am unable to make a sequence of commands to a SQL equivalent. I have a table loaded in a DataFrame with some columns: In SQL, to count the amount of different clients per year would be: And the result wou…
Django – Custom Admin Actions Logging
All changes you do in Django Admin is logged in the table django_admin_table and you can also see your most recent changes in “Recent Actions”. But when you write own “Admin Actions” and make changes through them nothing is being logged by default. Example: My question is now if itR…
How can I call ‘git pull’ from within Python?
Using the github webhooks, I would like to be able to pull any changes to a remote development server. At the moment, when in the appropriate directory, git pull gets any changes that need to be made. However, I can’t figure out how to call that function from within Python. I have tried the following: B…