python-如何将空参数传递给Popen(shell = False)?

我有外部脚本(sh),我想做这样的事情:
arg1 = 'some string'
arg2 = 'some string2'
arg3 = ''
cmd = ['/usr/local/bin/myscript', 'arg1', 'arg2', 'arg3']
Popen(cmd, shell=False, stdin=PIPE, stdout=PIPE, stderr=PIPE)
我似乎认为,如果“ arg3”为空,则只用两个参数调用了我的脚本,
如果它为空,如何传递“ arg3”事件?
解决方法:
test.py:
import sys
print(sys.argv)
test2.py:
import subprocess
import shlex
cmd="test.py 'some string' 'some string2' '' "
proc=subprocess.Popen(shlex.split(cmd))
运行test2.py产生
['test.py', 'some string', 'some string2', '']