💬 Fix chat for windows (#2443)

* fix chat for windows

* add some tests back

* Revert "add some tests back"

This reverts commit 350aef5.

examples/scripts/chat.py

@@ -15,7 +15,7 @@
 import copy
 import json
 import os
-import pwd
+import platform
 import re
 import sys
 import time
@@ -32,6 +32,10 @@
 from trl.trainer.utils import get_quantization_config
 
 
+if platform.system() != "Windows":
+    import pwd
+
+
 init_zero_verbose()
 
 HELP_STRING = """\
@@ -138,7 +142,10 @@ def print_help(self):
 
 
 def get_username():
-    return pwd.getpwuid(os.getuid())[0]
+    if platform.system() == "Windows":
+        return os.getlogin()
+    else:
+        return pwd.getpwuid(os.getuid()).pw_name
 
 
 def create_default_filename(model_name):