I am trying to perform in-place modification of a list of list on the level of the primary list. However, when I try to modify the iterating variable (row in the example below), it appears to create a new pointer to it rather than modifying it. Smallest example of my problem. The above example is a trivial ex…
Tag: python
Pandas: add column with progressive count of elements meeting a condition
Given the following dataframe df: I want to add another column that counts, progressively, the elements with df[‘B’]=’yes’: How can I do this? Answer You can use numpy.where with cumsum of boolean mask: Another solution is count boolean mask created by filtering and then add 0 values b…
multiprocessing.Value doesn’t store float correctly
I try to asign a float to the multiprocessing.Value shared ctype as follows: However, the float stored in multiprocessing.Value is != the input float: Whats the problem here? EDIT: Found the solution (see answers) However, I do not understand, why a “double” is the correct type here and not a R…
Seaborn Color Palette not working appropiate with lineplot
I’m having a little trouble with customizing my colors for a lineplot. I want to show an ensemble of spectras with a sequential color palette. The argument “palette=”blues” works fine, but does not accept any appropriate color lists (like “Blues_d”), which do not include an…
Python w/ Selenium Gmail Email Send Automating To: Field is Giving Me Trouble
The end goal is to send myself an email if my public ip address changes, as I don’t have dynamic dns and have to manually enter the ip addresses myself for my web server. I’ve done all I possibly can to try and get bash utilities to do the job for me, but CenturyLink is unfortunately out to block …
how can I find the path of virtualenv python
how can I find the path of virtualenv python ,built with this tutorial? (i want to find python in this env and use it in my eclipse) Answer You can use which to find out which binary will be executed… For example: By default it just shows the first match, but you can give the -a argument to show all:
How can I install the pylint for python2.7?
I try to install the pylint for the python2.7 which in ubuntu 18.04, but it raises an error with this words: I have been used the pip3 installed the pylint successfully for python3.6. So, how can I install the pylint for python2.7? Answer pylint still maintains support for Python 2 until maybe next year or so…
Alternative to the pandas negation operator
I’m trying to use the pandas negation operator ~ in one of my jinja2 templates but I believe its conflicting with their special operator ~. yields the following exception… I could do the operation on the python side and pass another variable with the negated selection but what’s the method n…
PyCharm 2018 Python Unresolved Reference ‘django’ VirtualEnv
I have the newest PyCharm version (2018) and the latest Django version (2.1) and Python (3.6) When I want to import something in PyCharm from Django: I get an error message under django stating: Unresolved reference ‘django’ I created a virtual environment and I ran a project on it, the most famou…
Installed Docker on Mac but can’t find the command
On My mac I ran: And it seems successfully: However, when I run the ‘docker’ at the terminal, it can’t find it: Then I run: It shows nothing. So how do I get docker to run? Thanks. Answer I’m unsure which instructions you followed to install via pip, however docker-3.4.1 is a very old …