How can I run a command that requires a filepath that contains spaces when using the `start` command with `os.system`

For Example:

```
# path_d[key] = C:\Users\John\Documents\Some File With Space.exe
path = path_d[key]
os.system("start {0}".format(path))

```

When I try running it I end up getting an error saying:

```
Windows cannot find 'C:\Users\John\Documents\Some.'. Make sure you typed the name correctly, and then try again.

```