In advance, sorry if this is question ought be on SuperUser or another site
The python3 shebang doesn't seem to work on win10. (I cant check right now, but I believe the analogous approach worked on MacOS for me last night). Consider the following
#!/usr/bin/env python3
print("hello world")
Leads to the error 'python' is not recognized as an internal or external command,
operable program or batch file. This makes sense because I only have a python3 distro on my machine (which can only be called like python3). However, Atom seems to be ignoring the shebang altogether. FYI, I'm running the script with the popular "script" atom package.
I've tried the permutation, #!/usr/bin python3, but this doesn't work either.
I've tried permutations
I'm still interested in how shebangs work within the Atom environment, but as far as getting python3 up and running, you dont need a shebang. You can simply change a config file (python.coffee) from within Atom, then relaunch. See Daniel Chamorro's excellent answer here: How to setup Atom's script to run Python 3.x scripts? May the combination with Windows 7 Pro x64 be the issue?
Related
I am looking for a way to upgrade my dumb reverse-shell to an interactive shell. I want to upgrade it with Method 3, which can be found here:
https://blog.ropnop.com/upgrading-simple-shells-to-fully-interactive-ttys/
The commands work properly until I try to foreground my shell. 'fg' is working like it is described in the guide but after my shell is foregrounded I am not anymore able to type in commands. It seems like my Shell is frozen. 'reset' would follow now which is necessary to proceed but since I can't type in anything, I cant proceed
Any Suggestions are very welcome
Thanks in advance
Okay, I found it out myself:
First of all I upgraded my dumb shell into a python shell which provides more feature than the original shell but is not completely interactive. Afterwards I used the method above to upgrade the python shell to a TTY shell.
I used:
which Python, Python2, Python3
to check my Python Version.
The command 'which' shows the complete Path and says not found if python is not installed.
Afterwards I have been running the following command (in my case was python3 installed):
python3 -c 'import pty; pty.spawn("/bin/bash")'
If you have another version installed than I had, you need to change python3 to python or python2.
I guess the problem was a bug with the dumb shell but this should fix it.
With the python shell you can follow the instructions I posted above :)
I think the problem occurs when you try to foreground the shell in a different line. If you are having a zsh shell you have to make sure to run the command as stty raw -echo;fg. For other shells you can run it in separate line.enter image description here
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I faced this silly problem since the last 2 days, and it turns me mad.
Since I installed python 3.9 on my new Windows 10 machine, when I run the command python3 -m venv .\venv, I get the error "Python was not found; run without arguments to install from the Microsoft Store, or disable this shortcut from Settings > Manage App Execution Aliases."
If I switch off the app execution aliases, as mentioned in the message, I got a message:
'python3' is not recognized as an internal or external command,
operable program or batch file.
So, I looked at similar issues on Stackoverflow and fixed the path in the environment variables (in the user variables and in the system variables).
I added to the variable 'paths' the 2 following entries:
C:\Users{myuser}\AppData\Local\Programs\Python\Python39
C:\Users{myuser}\AppData\Local\Programs\Python\Python39\Scripts\
In all cases seen on Stack, that should have been enough. Not in my case.
I rebooted my machine twice, to make sure the new variables were picked up, but it's still the same.
I must add that I am using daily my Jupyter Lab environment, and everything works fine.
It's just this venv that refuses to work.
Does anyone has a hint on other places I should look for ?
Solution found thanks to Michael Vine.
To summarize:
referring to python instead of python3 in the command line
using [virtualenv venv] instead of [python -m venv .\venv] as I did
I have a Python virtual environment on my linux machine. It has been working fine for two weeks, but all of a sudden I woke up today, and while in the environment I can't execute any commands. For example, if I try to use pip list, or jupyter notebook, this is what I get (env is the name of my environment):
~/env/bin$ pip list
-bash: /home/ubuntu/env/bin/pip: /home/ubuntu/env/bin/python: bad interpreter: No such file or directory
The same thing happens with basically any other command, except Python. Typing python brings up the Python shell just fine. Interestingly it says Anaconda though, when I only used pip with this environment.
I've tried to find info on this but they all seem to be pertaining to running scripts.
Edit: Also want to mention that when I manually look in the environment bin, the packages I installed are all there in green, except Python is in red.
Thank you in advance.
You have a script /home/ubuntu/env/bin/pip and the script has shebang #!/home/ubuntu/env/bin/python but the file is either absent or is not executable.
Check if the file /home/ubuntu/env/bin/python exist. Check if it can be executed by the current user (just run it from the command line). If not — you need to find out a working executable (for example, it could be /home/ubuntu/env/bin/python3), edit the first line of /home/ubuntu/env/bin/pip to fix the shebang.
I've been writing a Tkinter program and I don't want the console to show, so I used a .pyw file. However the program ran with an error that said the program could run usr/bin/python3, so I removed the shebang line, and it worked, but do I need a shebang line? Or should I keep it as is.
If it works without the shebang line:
Your computer found a version of Python to run it (likely in your "PATH" environment variables).
If it didn't work with the shebang line, either:
You made a typo, or
You gave it an incorrect path to your version of Python
Make sure you know exactly where Python is installed on your device:
Mac/Linux
Windows
(To anyone simply copy-pasting what you see in tutorials - without a good grasp of what it's doing: Try googling terms like "shebang line" and figure out what they might be doing behind the scenes)
I have some code working with python 3.6.6 but I have 3.7.2 in enviroment too.When I try to run my code in cmd, it's trying to run with 3.7.2.How can I chance it?
There are a couple of ways you can tell a script to run with a specific version of Python, commonly you'd use a shebang:
#!/user/bin/env/python3.x
However, I think this only works for Linux/Mac which it sounds like you aren't on if you're referring to cmd. You may want to check out this answer which has a few other options that may help: How do I tell a Python script to use a particular version
Alternatively you can set up a virtual environment, which allows you to run different versions of Python, modules and any other environment settings for a specific project. If that sounds like a better solution then this answer should help you out: (Easiest) Way to use Python 3.6 and 3.7 on same computer?