I want to upload Box2D‑2.3.2‑cp39‑cp39‑win_amd64.whl to my 3.9 python loaded mac. It always gives me this ERROR: Box2D‑2.3.2‑cp39‑cp39‑win_amd64.whl is not a valid wheel filename. I write the code "pip install Box2D‑2.3.2‑cp39‑cp39‑win_amd64.whl". So what should you offer to do. Thank you,
win in the whl filename stands for windows, so you do not have the correct whl file for your platform. You need to grab a macos labeled whl file from Pypi
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I decided recently that I want to start learning to code. I chose python as my first language because of it's versatility and Open Source connections. Now, of course to learn any programming language, first you have to be able to practice with it by writing code and running it.
I have Python beginner tutorials I am using but as soon as I got to the point where I wanted to run a simple Hello World message, I couldn't figure out how to get my document to actually RUN. I downloaded LiClipse with the hopes of using PyDev. I read that you can run a code directly from PyDev.
Wow, what a confusing mess! I downloaded the instant install version of LiClipse and I had to manually update the pip because it was out of date and that took an hour of research all on it's own to figure out how to do it.
Now that I have the interpreter set up correctly with the most recent pip...(I THINK), when I try to run any code I write, it doesn't let me. It wants me to save it first, which of course is quite logical. But when I try to save it, it says there is no folders to save to. How can there be no folders? I have been reading the install help, but it doesn't say anything about this issue. Or maybe it did explain how to fix this issue and I simply didn't understand all the jargon included in the configuration documentation. It kept instructing me to do technical things I couldn't understand.
Can anyone tell me what is going on? Shouldn't this all be ready to go when I used the "instant install" ?? I am just a beginner here, I don't know all this technical installation jargon. If anyone can help me get this setup, please let me know.
I really want to start learning. But I can't if I don't have the right tools.
Yeah, the technical jargon can be really confusing in the beginning. I've never heard of LiClipse but I can give you a few tips to get started:
Use a good IDE or Editor. For beginning VsCode with the Python PlugIn is quite good. You can also use PyCharm (the free version is enough) but that IDE is quite confusing.
Get comfortable with the commandline. On Windows you can invoke Python by running py on Linux with python3. You open the commandline on Windows by opening the startmenu, entering cmd and hitting enter.
You will have to make sure Python is in your "PATH" enviroment variable. That is a variable telling the Operating System where to find your programms. It should have asked you whether you want to add Python to your PATH during the install.
You run your python programm by saving it as a .py file and running py <filename.py> or python3 <filename.py> on Windows or linux respectively. You have to be in the directory where you saved your file of course.
I hope I could help you. Please mark this answer as accepted if it did answer your question or helped you with your issue.
I want to start by saying I'm mainly experienced in C & C++, not Python, but with programming in general many of the concepts carry over. I also don't have enough rep to comment, or I'd ask for some clarification on how familiar you are with the commandline.
I'm going to assume you're on Windows since you didn't mention the platform.
I wrote this like a tutorial, because I found those to be very helpful when I first started programming.
I can't recommend this enough, start off by using the commandline!
I think you complicated things more by searching for a text editor that can also run code. In order to get something like that working for your setup you need to know what's happening behind-the-scenes first.
Once you have a grasp of how to write & execute Python code, then you can move on to an IDE or advanced text editor like Visual Studio Code or LiClipse with confidence.
R+Click on the Start Menu, then click on Windows PowerShell to open a terminal.
Take a moment to note the filepath shown before the blinking cursor.
This is known as the Working Directory, which works similar to how the file explorer only allows you to "view" one directory at any given time; You can open multiple explorer windows side-by-side, but you can't view multiple directories at the same time in a single window.
You can run commands by typing them and pressing Enter.
You can also use the Tab key to autocomplete things like directory/file names, commands, etc. after typing a few characters.
Now let's create a workspace directory for your first project.
This can be anywhere that you choose, but for the sake of simplicity I'll be using my User directory which is usually where PowerShell will start by default.
To create a new directory named _workspace, use the mkdir (Make Directory) command like so:
mkdir _workspace
Now let's change our working directory to _workspace by using the cd (Change Directory) command like so:
cd _workspace
This directory is empty, but if you want to view the contents of a directory you can use the ls (List Directory) command:
ls
Since this is an empty directory, nothing will happen.
Next, we'll create a Python script file using the touch command, which creates empty files:
touch HelloWorld.py
Now that we have a script file, open HelloWorld.py in Notepad by running this command:
notepad HelloWorld.py
If you use a dark desktop theme, now is the time when your retinas may be seared out by the intensity of Notepad's white color scheme.
Now, let's add the code to print "Hello World!" in Python:
print("Hello World!")
Once you're done, you can save & close Notepad to save your retinas.
Now it's time to run the program! In the PowerShell window, enter this command:
py HelloWorld.py
which will show:
Hello World!
If you see an error saying this:
The term 'py' is not recognized as the name of a cmdlet, function, script file, or operable program.
You should re-install Python and make sure you check this box in the installer:
After re-installing Python and checking the Add to PATH box, close and reopen the PowerShell window, enter the cd _workspace command again, followed by py HelloWorld.py, which should be successful this time.
I hope I could be of some help, if so, I'd greatly appreciate marking this answer as accepted so I can write comments. Happy coding!
If you are using Linux following will work.
Install python3 first (Its better to stuck on python3 now. Once you get use-to then you can code in python2.7 also.)
Open a terminal, go the folder contains your code. If your source code is in hello.py then type python3 hello.py on terminal. It will execute and print the output on terminal.
The suggestions given by both #radj and #C. Dautermann are excellent.
Like others here, I will be assuming that you are on Windows.
Before jumping into LiClipse and PyDev, I highly recommend making sure that Python and packages (such as pip) are functioning on their own first. Command line is a great tool for this.
Windows Command Line can be accessed in a variety of ways, one of which is to go to your start menu and search "cmd." Command Prompt should return. In the command prompt, run the following:
python
This should return the version of Python installed on your machine if it is configured properly. For example, you may see the following:
Python 3.10.1 (...)[...] on win32
If this does not appear, I recommend uninstalling Python and reinstalling. In the installer, you will want to check the "Add Python ... to PATH" option. This will configure your environment variables on your machine. If you plan on running multiple versions of Python down the road, don't worry; you can use batch files to set the PATH variable to another version.
Once you have Python working, your command prompt will lead with the following:
>>>
Notice that there is no longer a file path followed by >>. This is because you are now in the Python interpreter. Congratulations!
To exit the Python interpreter, enter Ctrl+Z. It should appear as the following:
^Z
After we know Python works, we will check to see that pip works. Ensure you have pip installed by entering the following:
python -m pip --version
You should then be able to see the pip version. For example:
pip 22.0.3 from C:\...
If pip is not working, you can consult this documentation on pip to make sure pip gets installed properly.
Once pip is working, again, congratulations! You've gotten over some of the biggest hurdles. At this point, you can open up any text editor, type in:
print('Hello World!')
save the file with the extension .py, then run the script through command prompt. To run a script through the command line, you have to cd to the file location, then run the script with python, like so:
cd filepath
python filename.py
Where filepath is the path to the Python file and filename is the name of the file. For example:
cd C:\Users\name\Documents\PythonPractice
python helloworld.py
Usually, command line is all that is needed when starting out with Python outside of a text editor. Notepad comes standard on Windows computers, but there are plenty of other editors out there. Sublime text and Notepad++ are some of my favorites, personally.
Now, if you're able to run everything prior, the good news is that your Python and pip are both working, and you have everything you need to get started learning Python. If Python and/or pip are not functioning, there's thankfully a huge body of troubleshooting tips out there.
Unfortunately, from what I get of your initial post, you might be struggling with configuring LiClipse. I personally do not use LiClipse, nor do I use PyDev, so my help at this point may be limited. You may want to uninstall and reinstall after confirming your Python and pip work as a first step. After that, perhaps check that you are following the practices outlined in the LiClipse manual. Worst case scenario, you can try a different version of Python (I believe it has some Python3 incompatibilities), try running PyDev independent of LiClipse, or look at a different tool. If you believe the problem lies with file locations/existence, I would look at radj's post or play around in File Explorer to see what is going on for yourself.
Again, to get familiar with Python, you don't even need these extra tools. All you need is a text editor and the command line to get started.
Some other tools to help you get started:
PyPI
A venv virtual environment tutorial
PyDev
A comparison of LiClipse alternatives in case you continue to struggle
Hope this helps. Happy Coding!
I am just starting with Python, and I need to install Python 3.8 version. I assume this is the right place to get it:
https://www.python.org/downloads/release/python-3811/
After extracting .tar I get these files: screenshot of folder
but I don't know what to do next.
I searched for the answer and then I tried installing it from command line, however - without success.
I would be grateful if you could help me with such a basic but essential issue.
Thank you!
Read this Using Python on Windows
Followed the instructions in transcrypt "getting started" docs, I entered the examples 'hello.html' and 'hello.py' in a separate directory.
Entering from the command line: "transcrypt -b -m hello.py" resuleds in the error message: "'transcrypt' is not recognized as an internal or external command,
operable program or batch file."
I'm using python3.6, with transcrypt installed in: C:\program files\python36\lib\site-packages\transcrypt
Any help to activate the sample hello.html would be appreciated.
Could you try python -m transcrypt -b -m hello.py
and tell me what the console output is?
Also: are you on Windows, Linux or OsX?
Answer: Windows 10
[EDIT 1]
Looks like Transcrypt was installed under a different Python distro. Would be good to know what's going on, so please keep us informed. I also have several Python installs on my Windows 10 computer and it can be confusing indeed.
[EDIT 2]
Another possibility is manual installation (although it isn't elegant...). From the docs
http://www.transcrypt.org/docs/html/installation_use.html#installation-troubleshooting-checklist
Alternatively, for manual installation under Windows or Linux, follow
the steps below:
Download the Transcrypt zip and unpack it anywhere you like
Add ../Transcrypt-/transcrypt to your system path
To enable minification, additionally the Java Runtime Environment 6 or later has to be installed
Note If you install Transcrypt manually, Trancrypt is started by typing run_transcrypt rather than transcrypt. This allows a pip
installed Transcrypt and a manually installed Transcrypt to be used
side by side selectively
BTW Thanks for the suggestion on Github. We'll look into it and try to improve the docs on this point. It seems to be quite difficult to really draw up a bullet proof installation procedure for each platform.
You might also find it easier to use python3's built in virtual env, so that you install Transcrypt and other python modules only into one project folder at a time. It's much easier to use than it at first sounds.
Here's how you might do that on Windows 10.
mkdir mynewproject
cd mynewproject
py -3 -m venv myvirtualenv # installs venv files into myvirtualenv
myvirtualenv\Scripts\activate # activates the virtual env
The py -3 command uses the python windows launcher to use the latest version of python 3. The launcher is defined in Pep 397 and the docs are here.
Once the virtual environment is activated, the prompt will change to show that. After which any 'pip install' commands will install packages into 'myvirtualenv', instead of the system wide location. If you want to deactivate it, just type 'deactivate' or close the shell window. You can also just use 'python' to refer to python3 from within the virtual env. This has saved many people from madness.
In case this helps for other newbies. A few problems I encountered when setting up transcrypt.
Path issues: I had multiple versions of python, in different folders: \python26, \python27, and \Program Files\python36.
This caused all sorts of grief, despite setting the environmental path to include the python36 distro. I fixed this issue by renaming the other versions \python26x and \python27x. This left those distros intact if ever I needed to use them, but stopped the system from finding them. Thus, it only found python36
My earlier suggestion of py -3 didn't really solve the multiple distro issue completely after all.
After doing that, I reinstalled transcrypt and it seemed OK (sort of: read on)
Second issue was trying to run the sample hello.py. I tried "transcrypt -b hello.py" and got a "'transcrypt' is not recognized.." message.
But this worked: python -m transcrypt -b -m hello.py
That worked because the system had finally found the correct version of python, due to the above fix.
Similarly, trying to run the sample hello.py as recommended in the docs caused a problem. run_transcrypt -b hello.py
The reason for this was that run_transcrypt resolved to "python $(dirname $0)/main.py $*"
But, because I had python v3.6 installed in c:\Program Files, the batch file run_transcrypt caused this output:
c:\transcrypt>python C:\Program Files\Python36\Lib\site-packages\transcrypt__main__.py -b hello.py
python: can't open file 'C:\Program': [Errno 2] No such file or directory
Consequently, I had to place Program Files in quotes and run it this way:
"C:\Program Files"\Python36\Lib\site-packages\transcrypt__main__.py -b hello.py
or else, as above: python -m transcrypt -b -m hello.py
I think, with respect, the docs should raise a warning flag here for users who have python installed in \Program Files, rather than, for example, in c:\python[x]
Third issue Changing hello.py to "play around" with the code -
I found the files in transcrypt\demos\ to be read-only. To fix this:
1: I opened the command prompt as administrator
2: I ran the attrib command to change the file attributes:
"c:\Program Files\Python36\Lib\site-packages\transcrypt\demos\hello>attrib -r -s -a hello.py"
(Without doing this as administrator you get an access-denied message)
The whole exercise caused a few hours of toing and froing, but it seems that things are better now.
I know that similar- questions about installing modules in Portable Python have been
asked but I have looked at all of them and another website. I didn't have success.
For me, I wanted to install Pygame on Portable Python 3.2.5.1 (on a memory stick). I nearly
managed to install it successfully but when I typed import pygame into the shell window,
there was a weird error in one of the files, displayed in the shell. See image below:
Update: Portable Python at time of writing has been discontinued (not being developed anymore)
and there are other alternatives available in suggested links on their website or internet search
engine query results. I have managed to add the Pygame Python module to my version
of one of these continuing projects so this question is not of use to me anymore.
I had this same problem today. I may have managed it. This is what I did:
I installed pygame to an empty folder so I could see all the things it needed. this was two folders:
Include>pygame and
Lib>site-packages
I went to Lib>site-packages and copied all the things there, then pasted them into
G:\Portable Python 3.2.5.1\App\Lib\site-packages
I also copied all the things in:
G:\Include\pygame
and pasted them into:
G:\Portable Python 3.2.5.1\App\include
from a quick play, this seems to work.
Although it isn't really the proper answer I was looking for a while ago when I posted the question (how to install Pygame on Portable Python 3.2.5.1), I have a possible answer for my question that could work.
It is possible (although I haven't personally tested it yet) run a Python
program using Portable Python and with the Pygame library folder stored in the directory the program is stored in. Python's module search path includes the current directory (of the running file) so import pygame would import it.
This question is old and maybe this is a possibility that was not possible at this time but simply:
From a command prompt go to your Portable Python's python.exe folder with cd <path to Portable Python>\App\Python,
Run: .\python.exe -m pip install pygame,
Now you have pygame module installed, you can check in your <path to Portable Python>\App\Python\Lib\site-packages that you have now pygame.
Note: I used Portable Python from here, version 3.10.5 at the time I wrote this.