Reverts "filename" parameter rename for consistency

Author: jerluc

pvlib/iotools/tmy.py

@@ -24,7 +24,7 @@
 }
 
 
-def read_tmy3(filename_or_obj, coerce_year=None, map_variables=True, encoding=None):
+def read_tmy3(filename, coerce_year=None, map_variables=True, encoding=None):
     """Read a TMY3 file into a pandas dataframe.
 
     Note that values contained in the metadata dictionary are unchanged
@@ -37,7 +37,7 @@ def read_tmy3(filename_or_obj, coerce_year=None, map_variables=True, encoding=No
 
     Parameters
     ----------
-    filename_or_obj : str, Path, or file-like object
+    filename : str, Path, or file-like object
         A relative file path or absolute file path.
     coerce_year : int, optional
         If supplied, the year of the index will be set to ``coerce_year``, except
@@ -188,7 +188,7 @@ def read_tmy3(filename_or_obj, coerce_year=None, map_variables=True, encoding=No
     """  # noqa: E501
     head = ['USAF', 'Name', 'State', 'TZ', 'latitude', 'longitude', 'altitude']
 
-    with _file_context_manager(filename_or_obj, mode="r", encoding=encoding) as fbuf:
+    with _file_context_manager(filename, mode="r", encoding=encoding) as fbuf:
         # header information on the 1st line (0 indexing)
         firstline = fbuf.readline()
         # use pandas to read the csv file buffer