[environment]
python-platform = "all"

import os

reveal_type(os.name)  # revealed: LiteralString

[environment]
python-platform = "win32"

import os

reveal_type(os.name)  # revealed: Literal["nt"]

[environment]
python-platform = "linux"

import os

reveal_type(os.name)  # revealed: Literal["posix"]

[environment]
python-platform = "linux"

import os

if os.name == "nt":
    windows = True
else:
    posix = True

# error: [unresolved-reference]
windows

# no error
posix

if os.name == "nt":
    os.startfile("foo.txt")

[environment]
python-platform = "win32"

import os

if os.name != "nt":
    os.uname()

if os.name == "nt":
    os.startfile("foo.txt")