The wget command should work in Jupyter Notebook of VS Code as well since it worked in Google Colab.
You need to have wget installed in order to use it. Relying on external command might cause issues like one that you have encountered. If you want your code to be portable, then avoid relying on such command if possible.
Python standard library has function urllib.request.urlretrieve which will download file for you and is easy to use, consider following simple example
from urllib.request import urlretrieve
urlretrieve("https://www.example.com","example.html")
which does download Example Domain page and save it as example.html in current working directory
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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 I downloaded the instant install version of LiClipse and I had to manually update the pip because it was out of date and that took an hour of research all on it's own to figure out how to do it.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 pretty new to programming, and have never used Zbar before. I am trying to write a simple script that will allow me to import Zbar and use it to decode a barcode image. I already have a script set up to decode text from images that uses Pytesseract and Tesseract OCR, but I need to be able to decode barcodes as well. I have Windows 7 32 bit, and and am using Python 3.4. I have already installed Zbar and have used it from the command line successfully to decode their barcode sample. I have tried using >pip install zbar, but I keep getting the error:
"fatal error C1083: Cannot open include file: 'zbar.h': No such file or directory
error: command 'C:\Program Files\Microsoft Visual Studio 10.0\VC\BIN\cl.exe' failed with exit status 2"
Getting the pytesseract OCR was painless but I have wasted a lot of time on this barcode portion of it, any help or alternatives would be much appreciated.
Seven months later you accepted the best answer, a simple solution for
python3.4+ on Windows OS appeared. A ctypes-based wrapper around the zbar barcode reader, a package named pyzbar. If you are on Linux, you need to install libzbar0 but you said you are using Windows and the zbar library is included as dll with the Windows Python wheels. Today, all you need to do is launch:
pip install pyzbar
References for the package:
https://pypi.python.org/pypi/pyzbar
https://github.com/NaturalHistoryMuseum/pyzbar/
I thought I'd share my explorations and discoveries in relation to this problem, even though #ltadams21 has found a workaround.
The short answer: You can't. The zbar module is only compatible with Python 2. The incompatibilities are at the level of the Python C API, which is deep magic beyond my ken.
There's a bug report for this. In the meantime, use the os.system workaround that #ltadams21 posted, or maybe try zbarlight instead? (I haven't tried it myself, because it says it only reads QR codes, and I need something that reads EAN barcodes.)
The long answer: You can follow along with these steps, which represent my best efforts to get it working, but (spoiler alert) it still won't work at the end.
(Re)install zbar for Windows (zbar-0.10-setup.exe), making sure to tick the "Development Headers and Libraries" option.
Download and extract the zbar Python package (zbar-0.10.tar.bz2).
Open setup.py in your preferred text editor.
Scroll to the bottom, find the line that starts libraries, and insert a new line below it, like so (checking that the path is the same on your system as it is on mine):
libraries = [ 'zbar' ],
include_dirs = ['C:/Program Files (x86)/ZBar/include'],
Open a command prompt inside the extracted package and run python setup.py install.
Observe that the new errors now relate to PyIntObject and PyInt_Type. Discover that these are Python 2-only objects.
If desperate, try to re-#define them to use PyLongObject and PyLong_Type instead. Fail, because of course it's not that easy. Bang head against keyboard (gently).
Give up, and use the os.system workaround that #ltadams21 posted.
Forget wrestling with all of the wrappers. The easiest solution for me was to simply use
import os
os.system(r'D:\Winapps\Zbar\bin\zbarimg.exe -d d:\Winapps\Zbar\Examples
\barcode.png')
Worked instantly. Hope this helps anyone else struggling with that issue.
As of November 2016, there is the package pyzbar. To import Zbar for python3.4+ on Windows OS, all you need to do is launch
pip install pyzbar
This is possible because pyzbar is a ctypes-based wrapper around the zbar library that is included as dll with the Windows Python wheels.
The ZBar for python says you need to have the ZBar library installed for it to work. http://zbar.sourceforge.net/download.html
I found an easy solution for 3.4+. First install pyzbar
pip install pyzbar.
Then the below should work
import pyqrcode
from pyzbar.pyzbar import decode
from PIL import Image
qr = pyqrcode.create("HORN O.K. PLEASE.")
qr.png("horn.png", scale=6)
decode(Image.open('horn.png'))
print(qr.data)
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.
I have just downloaded the youtube-dl-2014.07.15.tar_2.gz in my windows. At first I want to tell I don't know anything about python. And I already have installed python 2.7. Can anyone give me instruction to execute these scripts?
I have already tried to run...but there is some error like these. "No mudule named youtube-dl"
I want a fresh start. Now I am using windows 8.1 and I have also tried youtube-dl.exe. And there is also problem like screenshot
If I want to get worked both script and program what will I do?Any helps will be appreciated. If you give me instruction from scratch that will be better.
To install youtube_dl in Python on Windows (command from their github):
Tested with Python 3.9 on Windows 10
pip install --upgrade youtube-dl
Now when using it, notice that the name of the Python module is with an underscore.
Because it is a Python module, use it like so:
py -m youtube_dl <video url>
Of course video url is the video you want to download
This seems to be caused by a limitation of py2exe. You may want to file a youtube-dl bug report for moving to a cxfreeze, which should not have that problem. In any case, simply moving the youtube-dl.exe file into another directory such as C:\Users\Shamim should fix the problem.
you need just to put the youtube-dl.exe file in in your home directory or any other location on your PATH.
You can see your PATH in your "Envirenment Variables"
I have EPD. I would like to use the ipython shell. I think it's called 'pylab' in your distribution. I would like to be able to append to the system path ($pythonpath) at the moment when the shell loads. Unfortunately, I can not seem to locate the ipy_user_conf.py file that many users on the internet report is where I need to include a line to do that. Please help!!!
I'm going to guess that you're running IPython >= 0.11. (Note the IPython version is displayed when starting up the IPython shell.)
Older versions of IPython (pre-0.11) used ipy_user_conf.py, but IPython's configuration system was overhauled in 0.11. For details, see this overview. If you want to run some code on start up, you can add a python file in your IPython startup directory, which should be here:
~/.ipython/profile_default/startup/
Any python code in that directory gets run on startup, so you can just create a new .py to modify your python path. If the startup directory doesn't exist, you may need to run:
ipython profile create
which creates those directories (plus some other goodies).