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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 I downloaded the instant install version of LiClipse and I had to manually update the pip because it was out of date and that took an hour of research all on it's own to figure out how to do it.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 was previously using RubyMine to run cucumber test scripts and it works just fine, but I am looking for an alternative to run those scripts from command line.
When I try to run a specific .feature file from cmd, I get an error stating that my Ruby step definitions are undefined. I am assuming this is because they are not located in the same directory as the .feature file that I am trying to run.
Here is my cmd output:
Undefined Steps error output
Any suggestions welcome! Thanks
If you're running cucumber from your_directory. Then your .feature files should be in your_directory/features and step definitions (.rb files) in your_directory/features/step_definitions Subfolders are supported.
Look at https://docs.cucumber.io/guides/10-minute-tutorial/
If you're running Win10, check WSL - makes your life better ;-)
Using Shoes (v3.2) to 'Package my App'. Package directory with start script.
Including full copy of shoes.
Opening the packaged app e.g. double click icon, the error console opens:
No such file or directory # rb_sysopen -
/private/var/folders/20/9wqryt1n76s1f0b9mpq500nc0000gp/T/shoes-upload-gui.40507/upload-gui.shy
Visiting the temp directory the shy file is not packaged as part of that directory.
I have tried
putting the shy into the directory then packaging again works, but the package is now twice as big
creating a dummy (zero byte) .shy file in the directory and packaging it. This fails with a different error (seems to be trying to unpack the shy and it fails to open - no surprise)
run the app from command line via shoes-launch e.g /Applications/Shoes.app/Contents/MacOS/shoes-launch rubystart.rb console log error never appears
i have noticed that if run shoes-launch with an additional argument e.g /Applications/Shoes.app/Contents/MacOS/shoes-launch rubystart.rb blah then i get the same No such file or directory # rb_sysopen - blah error for that file
so it seems like the ruby-shoes packager is trying to call shoes-launch with additional command line parameters (its own shy file?)
anyone come across or fixed this e.g. not needed to put the full shy package within itself?
thanks
Ben
I never fixed the shoes packager. I had to manipulate the final xxx.app as follows
remove the .shy file
copy over my ruby files
ensure gems copied over into lib/gems/... (Note i had issues with gems being picked up via rvm anyhow )
edit XXX-launch script removing .shy file with my own ruby file
and it all works. there is no error when opening the app.
conclusion: something in the .shy file perhaps? shoes is being upgraded to shoes 4 anyhow, and all this was on shoes 3.
It seems to happen only when trying to package the whole directory.
(Which also requires creation of a .shy file)
My workaround would be: Package a single file and copy the rest into the bundled application.
I only tryed this on MacOSX and the path inside the App would be "Contents/MacOS/".
After doing this everything worked fine, my app is very simple though.
I'm trying to use p4 commands in my batch files on Mac like p4 login etc.
I keep getting the error "-bash p4: command not found".
I followed the top 7 steps here and got the same error:
http://www.endlesslycurious.com/2008/11/11/configuring-p4-command-line-client-on-mac-os-x/
I couldn't find anything else useful when searching.
Has anyone else encountered a similar issue and resolved it?
Just drop the "p4" executable in /usr/local/bin or even /usr/bin if you prefer. ;-)
How-To steps:
(1) Download p4 file for macOS from:
https://www.perforce.com/downloads/helix-command-line-client-p4
(2) Copy the item to any local folder under any custom folder. For ex: '/Users//perforce'
(3) Run the following commands in terminal.
chmod +x /Users/<yourname>/perforce/p4
export PATH=/Users/<yourname>/perforce:$PATH
(4) Now run 'p4' in terminal.
This should not fail!
To add to the existing answers, on my macOS Mojave, downloading Perforce 2019.1/1796703 for OSX 10.10+ using Safari gives me a p4.dms file.
You must rename it to p4 first before using it. Any attempt to unarchive the .dms file will fail. It is not a valid DMS archive.
I installed Plone 4.1.3 and I am trying to make a theme. I saw this link talk about this issue:
http://www.treebrolly.com/blog/turbo-plone-theming-with-xdv-diazo
and I followed the commands. When I run this command
$ ./bin/instance fg
it says
Error: error opening file /home/hosam/plone413/zinstance/parts/instance/etc/zope.conf: [Errno 2] No such file or directory: '/home/hosam/plone413/zinstance/parts/instance/etc/zope.conf'
For help, use ./bin/instance -h
hosam#hosam-desktop:~/plone413/zinstance$
I noticed that when I run this command
$ ./bin/buildout -c demo.cfg
this directory and its contents are deleted /home/hosam/plone413/zinstance/parts/instance/
and so this error appears to me, Any can help??
When you run :
$ ./bin/buildout -c demo.cfg
the parts folder is supposed to be deleted and rebuilt (that's fine).
The error you are facing says that this command doesn't end correctly. Try to add the -v parameter
$ ./bin/buildout -v -c demo.cfg
so you will have a more verbose output and you can provide here a complete error traceback
Set up your demo.cfg in a different buildout directory. Looking at the blog entry you mentioned, it's meant to standalone, not share the same buildout directory with a zope/plone instance.
You might want to consider using plone.app.theming instead of XDV. The big difference is that plone.app.theming runs inside Plone and doesn't require any separate build. That really simplifies things if you don't need to mix in content from non-Plone sources.