DOC: Fixing EX01 - Added examples (pandas-dev#53274)

* Added Examples

* corrected code_checks

Author: DeaMariaLeon

ci/code_checks.sh

@@ -169,11 +169,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         pandas.Timedelta.to_numpy \
         pandas.Timedelta.total_seconds \
         pandas.arrays.TimedeltaArray \
-        pandas.Period.freqstr \
-        pandas.Period.is_leap_year \
-        pandas.Period.month \
-        pandas.Period.quarter \
-        pandas.Period.year \
         pandas.Period.asfreq \
         pandas.Period.now \
         pandas.arrays.PeriodArray \

pandas/_libs/tslibs/period.pyx

@@ -1984,6 +1984,12 @@ cdef class _Period(PeriodMixin):
     def year(self) -> int:
         """
         Return the year this Period falls on.
+
+        Examples
+        --------
+        >>> period = pd.Period('2022-01', 'M')
+        >>> period.year
+        2022
         """
         base = self._dtype._dtype_code
         return pyear(self.ordinal, base)
@@ -1992,6 +1998,12 @@ cdef class _Period(PeriodMixin):
     def month(self) -> int:
         """
         Return the month this Period falls on.
+
+        Examples
+        --------
+        >>> period = pd.Period('2022-01', 'M')
+        >>> period.month
+        1
         """
         base = self._dtype._dtype_code
         return pmonth(self.ordinal, base)
@@ -2301,6 +2313,12 @@ cdef class _Period(PeriodMixin):
     def quarter(self) -> int:
         """
         Return the quarter this Period falls on.
+
+        Examples
+        --------
+        >>> period = pd.Period('2022-04', 'M')
+        >>> period.quarter
+        2
         """
         base = self._dtype._dtype_code
         return pquarter(self.ordinal, base)
@@ -2409,6 +2427,16 @@ cdef class _Period(PeriodMixin):
     def is_leap_year(self) -> bool:
         """
         Return True if the period's year is in a leap year.
+
+        Examples
+        --------
+        >>> period = pd.Period('2022-01', 'M')
+        >>> period.is_leap_year
+        False
+
+        >>> period = pd.Period('2020-01', 'M')
+        >>> period.is_leap_year
+        True
         """
         return bool(is_leapyear(self.year))
 
@@ -2428,6 +2456,11 @@ cdef class _Period(PeriodMixin):
     def freqstr(self) -> str:
         """
         Return a string representation of the frequency.
+
+        Examples
+        --------
+        >>> pd.Period('2020-01', 'D').freqstr
+        'D'
         """
         return self._dtype._freqstr