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QUESTION
I have this component with two text-fields with two expressions that should evaluate to the same thing.
...ANSWER
Answered 2022-Feb-04 at 22:55This is because properties are reactive and function calls are not. However, you can achieve this with computed properties:
QUESTION
I've been trying to download a lib called simpful. But I was just about start to python and I think I am missing something very basic. I searched for some sort of solution online for so long nothing worked for me yet. I haven't downloaded anything with pip before.pip version is 21.3 and python 3.10. I know its just and error log but perhaps someone could recognize it.
...ANSWER
Answered 2021-Oct-21 at 10:28down to the very bottom of the stack error:
QUESTION
After the release of Python 3.10, I reinstalled my modules for the newest version and I'm getting some trouble. First of all I tried to pip Numpy as it's the required one for matplotlib. But I got this problem:
...ANSWER
Answered 2021-Nov-06 at 23:20As others have stated, Python 3.10 is not currently compatible with Matplotlib. You need to install and use Python 3.9 until it is supported. Until then you have a few options:
WindowsYou can use the Python Launcher for Windows (py.exe) script to choose which Python version to run like so:
py.exe script help:
py -h
List all installed versions
py -0
Use a specified version
py -3.9
e.g. 1
Create a virtual environment using python 3.9
py -3.9 venv .venv
e.g. 2
install matplotlib with pip using python 3.9
py -3.9 -m pip install matplotlib
On Linux you can run whatever Python version you like like so:
python3.9
You can set up a local (your working directory and all sub-directories) virtual environment that will use your specified version like so:
python3.9 -m venv .venv
Which will set the version of python used to 3.9 while in the local directory, and allow you to type python
instead of python3.9
each time you need it.
Another relevant and helpful post by Rotareti here.
Please note that I have not described how to activate and use Python Virtual Environments here in detail, for more information on using them read the python docs.
Reference this answer if you're interested in installing a matplotlib release candidate.
QUESTION
I have install Python 3.10 on Windows 10.
Then I installed numpy and matplotlib without problem.
But when I try to install scipy, I get a ton of errors.
The install sequence is below.
Is this related to needing MKL/BLAS libraries? If so, what should I install?
...ANSWER
Answered 2021-Oct-31 at 13:24In scipy's PyPI page, it looks like scipy doesn't support 3.10 as the meta says
QUESTION
First, I do not believe this is a duplicate post of matplotlib installation issue python 3 this
issue is relevant to matplotlib and Python 3.10
which was just recently released.
I am having issues installing matplotlib with Python 3.10.
I did not have these issues Python 3.9.6
. When installing matplotlib, I referenced the official instructions and I used the following command:
python -m pip install -U matplotlib
Then I got this very long error message:
...ANSWER
Answered 2021-Oct-26 at 16:49Not totally sure, but I ran into the same issue. After some digging and testing I think I've found out that Matplotlib, and pylab aren't compatible with python3.10 yet. For the time being I've kept python3.9 along with 3.10 so whenever I use matplotlib, numpy, or pylab, I just use version 3.9.
QUESTION
I recently upgraded to the latest version of python
version 3.10.0
and upgraded pip
also to the latest version 21.2.4
.
Now I cannot use pip
to install anything. This is the error it gives for anything I try to install.
ANSWER
Answered 2021-Oct-09 at 05:14Try to upgrade your pip
QUESTION
Given source and target dataframes in Pandas, I need to update a column in the target dataframe by an amount specified in a column of the source dataframe, for every match on a key column.
In the example below, the source and target dataframes are RecetteDF
and InventaireDF
, respectively. The key column common to both is Codes interne
. Quantite Reserver
in the target has to be incremented with values from Quantite requise
from the source on matching key.
I've made it work, but it's really not optimal.
So far my function looks like this:
...ANSWER
Answered 2021-Sep-24 at 06:54You can use pandas.merge
to pull Quantite requise
in from RecetteDF
whenever you have a match. The merge should be done using left
, so that we preserve rows of InventaireDF
even when there is no match. Here is some code that should work:
QUESTION
I am trying to pause a thread until the initial thread finishes.
My thread_pool starts like:
...ANSWER
Answered 2021-Sep-17 at 22:11This is a classic use case for threading.Semaphore
Inside each function that can't be run concurrently, Instantiate it globally (in the main thread) using Semaphore(1)
. Use acquire()
and release()
methods accordingly to serialize access to your "shared resource" (inside the main monitir_folder
function or the process_csv
functions, depends on where you're getting the error - in this case, CSV processing internal state
As the number of permits is 1, an RLock
will also make a good fit, but A Semaphore better express what you are trying to achieve.
Example:
QUESTION
I hope I can ask this question in a way that makes some sense as the data itself is not good. However, as it was written in the 1950s, I have no option but to try to make the best of it in trying to bring it into the current century for those of us who need it. Also, Benchmark speed is not an issue as this is run manually and only rarely, and always on my local PC rather than on the live server. The resulting table is then uploaded.
To outline, it is looking in the Models
field in parts_listing
to see any with the ordinal numbers 22ND, 23RD etc. If there are any, then it looks in parts_modelno
to find all that begin with the cardinal number 22, 23 etc. It takes all that match and populates parts_parsed
with the rows in the select statement. It is doing that but it is getting all from parts_modelno
, not just those that match.
For the first query below, it works well but needs multiple copies, one for each of the ordinal and cardinal values of 22ND, 23RD, 24TH, 25TH, 26TH, 54TH
and 22, 23, 24, 25, 26, 54
.
The Models
field being queried in parts_listing contains data that varies considerably and another query has already extracted the bulk of it. For example, 2250-51-52-55-70-71
is a shortcut for 2250, 2251, 2252, 2255, 2270, 2271
and there are others such as these below with each example being in its own row. Those have already been parsed into parts_parsed. Those with BODY (and similar ones with MODEL) are not being parsed properly but that's another issue and not important here.
ANSWER
Answered 2021-Sep-13 at 14:34There are 3 slightly different versions of the solution here, for various versions of MySQL and MariaDB.
MariaDB 10.5 is compatible with all 3 solutions. MySQL 8.0 is compatible with 2, and MySQL 5.7 is compatible with just one of the following.
The pairs
derived table or WITH clause
term provides the pairs of patterns ('25TH', '25')
, etc.
Once we have that, it's just a matter of joining with that list in your original SELECT
query expression, used to generate the rows to be inserted.
QUESTION
I am using the latest (still demo, but yet the last version before the release) python - which is 3.10.0rc2.
I have issues with installing standard libraries such as numpy. I am using pip install
, python -m pip
etc.
cmd output:
...ANSWER
Answered 2021-Sep-09 at 13:23What happens is that some libraries that require compiling, such as numpy, included the pre-compiled binaries inside the installer (wheel) file. But they won't include binaries for non-stable releases (or niche architectures) - instead, the same file has the source code and some of the resources needed to build the binaries on the client (computer that is installing the library) side.
The error indicates that: the binaries are not included, and building them on your computer failed, probably likely to the lack of a build environment. Under Linux it is more or less simple to install everything needed to build numpy (and other libraries). Setting up such an environment on Windows computer can be somewhat complicated.
You'd be better looking for an unofficial build wheel with the package pre-compiled for Python 3.10 - if numpy is already working with 3.10, which might not be the case: while for most end-user code no changes are needed changing from Python 3.9 to 3.10, projects like numpy depend heavily on internal details of the language.
One of the mirrors which keep pre-compiled binaries for various Python package seems to have a numpy for Python 3.10 on windows: https://www.lfd.uci.edu/~gohlke/pythonlibs/#numpy (please note that while looking alright, there is no mechanism to verify these packages are not adulterated from the source code, as happens with all binary installs (binary installs from official sources usually will have hashes or other verifying mechanisms + the certificate chain to the domain/brand names) , so, while I personally would use packages from lfd.uci.edu, this is not risk free)
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