在Python脚本的bash命令中使用三个不同的引号

Question

I want to have three different quotation marks in a python script, because I want to execute a two-line python command, on a different computer. For example:

import commands
command = "ssh someothercomputer 'python -c `import psutil; print psutil.cpu_percent()`'"
output = commands.getstatusoutput(command)[1]

However, the backticks are not recognized as quotation marks. The error is the following:

"Badly placed ()'s.\nArgument expected for the -c option\nusage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...\nTry `python -h' for more information."

How can I get this to work?

Answer 1

Instead of using backticks, you can escape the inner quotation marks, to have them in command . Like this:

command =  "ssh someothercomputer 'python -c \"import psutil; print psutil.cpu_percent()\"'"

Executing this command with commands yields the wanted output (the current cpu percentage at the other computer)