DOC: fix SA01 error for DatetimeIndex: day_of_year, is_leap_year, inferred_freq (#58406)

* DOC: fix SA01 error for DatetimeIndex: day_of_year, is_leap_year, inferred_freq

* fixing line to long error

* Fixing: EXPECTED TO FAIL, BUT NOT FAILING errors

Author: KeiOshima

ci/code_checks.sh

@@ -102,13 +102,9 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.DataFrame.to_markdown SA01" \
         -i "pandas.DataFrame.to_parquet RT03" \
         -i "pandas.DataFrame.var PR01,RT03,SA01" \
-        -i "pandas.DatetimeIndex.day_of_year SA01" \
-        -i "pandas.DatetimeIndex.dayofyear SA01" \
         -i "pandas.DatetimeIndex.freqstr SA01" \
         -i "pandas.DatetimeIndex.indexer_at_time PR01,RT03" \
         -i "pandas.DatetimeIndex.indexer_between_time RT03" \
-        -i "pandas.DatetimeIndex.inferred_freq SA01" \
-        -i "pandas.DatetimeIndex.is_leap_year SA01" \
         -i "pandas.DatetimeIndex.snap PR01,RT03" \
         -i "pandas.DatetimeIndex.std PR01,RT03" \
         -i "pandas.DatetimeIndex.to_period RT03" \
@@ -264,14 +260,11 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.Series.dt.ceil PR01,PR02" \
         -i "pandas.Series.dt.components SA01" \
         -i "pandas.Series.dt.day_name PR01,PR02" \
-        -i "pandas.Series.dt.day_of_year SA01" \
-        -i "pandas.Series.dt.dayofyear SA01" \
         -i "pandas.Series.dt.days SA01" \
         -i "pandas.Series.dt.days_in_month SA01" \
         -i "pandas.Series.dt.daysinmonth SA01" \
         -i "pandas.Series.dt.floor PR01,PR02" \
         -i "pandas.Series.dt.freq GL08" \
-        -i "pandas.Series.dt.is_leap_year SA01" \
         -i "pandas.Series.dt.microseconds SA01" \
         -i "pandas.Series.dt.month_name PR01,PR02" \
         -i "pandas.Series.dt.nanoseconds SA01" \
@@ -400,7 +393,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.TimedeltaIndex.as_unit RT03,SA01" \
         -i "pandas.TimedeltaIndex.components SA01" \
         -i "pandas.TimedeltaIndex.days SA01" \
-        -i "pandas.TimedeltaIndex.inferred_freq SA01" \
         -i "pandas.TimedeltaIndex.microseconds SA01" \
         -i "pandas.TimedeltaIndex.nanoseconds SA01" \
         -i "pandas.TimedeltaIndex.seconds SA01" \

pandas/core/arrays/datetimelike.py

@@ -908,6 +908,11 @@ def inferred_freq(self) -> str | None:
 
         Returns None if it can't autodetect the frequency.
 
+        See Also
+        --------
+        DatetimeIndex.freqstr : Return the frequency object as a string if it's set,
+            otherwise None.
+
         Examples
         --------
         For DatetimeIndex:

pandas/core/arrays/datetimes.py

@@ -1835,6 +1835,11 @@ def isocalendar(self) -> DataFrame:
         """
         The ordinal day of the year.
 
+        See Also
+        --------
+        DatetimeIndex.dayofweek : The day of the week with Monday=0, Sunday=6.
+        DatetimeIndex.day : The day of the datetime.
+
         Examples
         --------
         For Series:
@@ -2155,6 +2160,13 @@ def isocalendar(self) -> DataFrame:
         Series or ndarray
              Booleans indicating if dates belong to a leap year.
 
+        See Also
+        --------
+        DatetimeIndex.is_year_end : Indicate whether the date is the
+            last day of the year.
+        DatetimeIndex.is_year_start : Indicate whether the date is the first
+            day of a year.
+
         Examples
         --------
         This method is available on Series with datetime values under