在不使用SCP的情况下在远程计算机上运行python脚本

Question

There is any possibility to run the python script in remote machine with out transfer files using SCP or better method? I have search a lot of libraries for solve this issue. But did not find the best solution for it.

I have found some libraries which perform SSH and SCP to remote machine using python script. In their approach first copy files to remote system using SCP and execute command over SSH.

Thanking you

Answer 1

You could use fabric .

Obviously it does depend on what exactly you want your remote python script to do, but it has a lot of helper functions for interacting with the OS including file upload & download but it's written all in Python.

Answer 2

You can invoke python with a flag to read the script from its standard input, and then feed the script to the python instance through the ssh connection, for example:

cat /some/script.py | ssh user@host 'python -'

Running python - will cause the python interpreter to read the script from the process's standard input. In this case, the standard input of the ssh process is passed to the remote system as the standard input of the python instance.

You can supply additional command-line arguments to the python script, if desired:

cat /some/script.py | ssh user@host 'python - arg1 arg2...'

Note that any import statements in the python script will be resolved on the remote system, so the script has to limit itself to modules which are available to the remote python interpreter.

Answer 3

Sure.

ssh remotehost python -c "'print(5)'"

A script needs not to be copied to execute it. The Python interpreter can run a script which is given as argument.

Double quoting is necessary (and will quickly become a hassle) because one level of quoting is removed by the ssh call and another is still necessary to group the script into one argument for the python call.

Multiline is also no problem:

ssh remotehost python -c "'             
import random
print(random.random())'"

will print something like

0.998373816572

Just be aware of the quoting stuff when you use ' or " in your Python script as well.

Another option is to have the script in a variable and then use printf to quote the contents properly:

a='             
import random
print(random.random())'
# or use something like a=$(cat myscript.py)

ssh ttiqadm@ttiq-hv02 python -c "$(printf "%q" "$a")"