Fix for legacy python

Author: bashtage

pandas_datareader/compat/__init__.py

@@ -1,4 +1,5 @@
 from io import StringIO
+import sys
 from urllib.error import HTTPError
 
 from pandas.api.types import is_list_like, is_number
@@ -12,7 +13,7 @@
     "assert_frame_equal",
     "is_list_like",
     "is_number",
-    "reduce",
+    "PYTHON_LT_3_10",
 ]
 
 
@@ -31,3 +32,6 @@ def get_filepath_or_buffer(filepath_or_buffer, encoding=None, compression=None):
             filepath_or_buffer, encoding=encoding, compression=None
         )
         return tmp
+
+
+PYTHON_LT_3_10 = sys.version_info <= (3, 10)

pandas_datareader/famafrench.py

@@ -6,7 +6,7 @@
 from pandas import read_csv, to_datetime
 
 from pandas_datareader.base import _BaseReader
-from pandas_datareader.compat import StringIO
+from pandas_datareader.compat import PYTHON_LT_3_10, StringIO
 
 _URL = "http://mba.tuck.dartmouth.edu/pages/faculty/ken.french/"
 _URL_PREFIX = "ftp/"
@@ -87,7 +87,8 @@ def _read_one_data(self, url, params):
             else:
                 c = ["Count"]
             r = list(range(0, 105, 5))
-            params["names"] = ["Date"] + c + list(zip(r, r[1:], strict=False))
+            kwargs = {} if PYTHON_LT_3_10 else {"strict": False}
+            params["names"] = ["Date"] + c + list(zip(r, r[1:], **kwargs))
 
             if self.symbols != "Prior_2-12_Breakpoints":
                 params["skiprows"] = 1