在python中将多个变量传递给os.system
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passing more than one variables to os.system in python
提问by hamed
I want to pass two variables to the os.system() for example listing files in different format in specific directory like (ls -l testdirectory) in which both a switch and test directory are variable. I know for single variable this one works:
我想将两个变量传递给 os.system() 例如在特定目录中列出不同格式的文件,如 (ls -l testdirectory) 其中开关和测试目录都是可变的。我知道对于单个变量,这个是有效的:
option=l
os.sytem('ls -%s' option)
option=l
os.sytem('ls -%s' option)
but I dont know how to pass two variables?
但我不知道如何传递两个变量?
回答by Joran Beasley
you are asking about string formating (since os.systemtakes a string, not a list of arguments)
您正在询问字符串格式(因为os.system需要一个字符串,而不是参数列表)
cmd = "ls -{0} -{1}".format(var1,var2)
#or cmd = "{0} -{1} -{2}".format("ls","l","a")
os.system(cmd)
or
或者
cmd = "ls -%s -%s"%(var1,var2)
or
或者
cmd = "ls -"+var1+" -"+var2
回答by Malvolio
This, for example, works:
例如,这有效:
os.system('%s %s' % ('ls', '-l'))

