Fix date formatting for windows

pysr/sr.py

@@ -198,7 +198,7 @@ def pysr(X=None, y=None, weights=None,
     if maxdepth is None:
         maxdepth = maxsize
     if equation_file is None:
-        date_time = datetime.now().strftime("%Y_%m_%d_%H:%M:%S")
+        date_time = datetime.now().strftime("%Y-%m-%d_%H%M%S.%f")[:-3]
         equation_file = 'hall_of_fame_' + date_time + '.csv'
 
     if isinstance(X, pd.DataFrame):

setup.py

@@ -5,7 +5,7 @@ with open("README.md", "r") as fh:
 
 setuptools.setup(
     name="pysr", # Replace with your own username
-    version="0.3.33",
+    version="0.3.34",
     author="Miles Cranmer",
     author_email="[email protected]",
     description="Simple and efficient symbolic regression",