I installed Anaconda3 so I can create environments and install different packages in each environment. But I fail to understand the difference between the Python in and I can seem to access Python 3.6.5 Anaconda from both, why is that? And, what is the difference between both? Furthermore, I would like to ins…
Tag: shell
Set shell environment variable via python script
I have some instrument which requires environment variable which I want to set automatically from python code. So I tried several ways to make it happen, but none of them were successful. Here are some examples: I insert following code in my python script I created bash script(env.sh) and run it from python: …
“Syntax error: Unterminated quoted string” error when calling a bash script from Python
I have a situation where, I need to call a bash script inside a python script which is in turn called inside another python script. download-output-files.py: watcher.py: copy_output_file.sh: When I run download-output-files.py , it calls watcher.py , which in turn calls copy_output_file.sh and below is the er…
how to check which version of nltk, scikit learn installed?
In shell script I am checking whether this packages are installed or not, if not installed then install it. So withing shell script: but it stops shell script at import line in linux terminal tried to see in this manner: which gives nothing thought it is installed. Is there any other way to verify this packag…
Shell – Trying to output last portion of a logfile (Time-stamp is the separator)
I would like to read in a logfile into shell, and output the last logged event that had occurred. These logs are selenium-python automated test results that I am using in larger script. This script requires the last chunk of the log. Here is an example of one of the last logged events from an example output f…
Change working directory in shell with a python script
I want to implement a userland command that will take one of its arguments (path) and change the directory to that dir. After the program completion I would like the shell to be in that directory. So I want to implement cd command, but with external program. Can it be done in a python script or I have to writ…
What is the subprocess.Popen max length of the args parameter?
I am using Popen function from the subprocess module to execute a command line tool: The tool I am using takes a list of files that it then processes. In some cases, this list of files can be very long. Is there a way to find the max length that the args parameter can be? With a large number of
os.system() execute command under which linux shell?
I am using /bin/tcsh as my default shell. However, the tcsh style command os.system(‘setenv VAR val’) doesn’t work for me. But os.system(‘export VAR=val’) works. So my question is how can I know the os.system() run command under which shell? Answer os.system() just calls the syst…
How do I execute a program or call a system command?
How do I call an external command within Python as if I had typed it in a shell or command prompt? Answer Use the subprocess module in the standard library: The advantage of subprocess.run over os.system is that it is more flexible (you can get the stdout, stderr, the “real” status code, better er…