Raw string to a Powershell script through command line - python-2.7

Question

I have powershell script which takes input from a python GUI. And the script looks like (foo.ps1):
#.\foo.ps1
[String]$UserName = $args[0]
[String]$Password = $args[1]
[String[]] $ComputerName = $args[2]
[String[]] $Users = $args[3]
Write-Output "Username is $UserName"
Write-Output "Password is $Password"
foreach ($Computer in $ComputerName) {
Write-Output "Computer is $Computer"
}
foreach ($User in $Users) {
Write-Output "Users is $User"
}
And my execution line in powershell window looks like:
PS dir>powershell -executionpolicy bypass -Command .\foo.ps1 "my_username" "my_password" "Computer1, Computer2" "User1, User2"
Problem arises when my password has special characters like '}', '{','(', ')', ',', '&', ';' need to be passed within these apostrophes. But when it contains characters like ' " `, it throws an exception: "The string is Missing the terminator: '.
How do I solve it. I use python subprocess to input that line to powershell using variables from that python script.
import subprocess
process = subprocess.Popen(['powershell.exe',"""powershell -executionpolicy bypass -File Foo.ps1 "username" "password" "computer1,computer2" "user1,user2" """], stdin=subprocess.PIPE,stdout=subprocess.PIPE)
print(process.communicate())
Expecting a simple way to address this issue.
When we enter the special characters through prompt, that is from 'read-host' line in powershell, it accepts everything without any trouble.
Is there anyway that I could automate that read-host prompt input using python subprocess ?

Answer 1

Try sending all the cmd arguments in a list format.
import subprocess
process = subprocess.Popen("""powershell.exe powershell -executionpolicy bypass -File Foo.ps1 "username" "password" "computer1,computer2" "user1,user2" """.split(), stdin=subprocess.PIPE,stdout=subprocess.PIPE)
print(process.communicate())