问如何在火星雨中度过一年中的第一天

EN

df = spark.createDataFrame([()], [])
(
    df
    .withColumn('current_date', f.current_date())
    .withColumn("year_start", f.trunc("current_date", "year"))
    .show()
)

# Output
+------------+----------+
|current_date|year_start|
+------------+----------+
|  2022-02-23|2022-01-01|
+------------+----------+

x = '12/09/2021'

'01/01/' + x[-4:]

output: '01/01/2021'

df = pd.DataFrame({
        'Date':['2021-01-23','2002-02-09','2009-09-19'],
})

sparkDF = sql.createDataFrame(df)

sparkDF.show()

+----------+
|      Date|
+----------+
|2021-01-23|
|2002-02-09|
|2009-09-19|
+----------+

sparkDF = sparkDF.withColumn('first_day_year_dt',F.to_date(F.date_trunc('year',F.col('Date')),'yyyy-MM-dd'))\
                 .withColumn('first_day_year_timestamp',F.date_trunc('year',F.col('Date')))

sparkDF.show()

+----------+-----------------+------------------------+
|      Date|first_day_year_dt|first_day_year_timestamp|
+----------+-----------------+------------------------+
|2021-01-23|       2021-01-01|     2021-01-01 00:00:00|
|2002-02-09|       2002-01-01|     2002-01-01 00:00:00|
|2009-09-19|       2009-01-01|     2009-01-01 00:00:00|
+----------+-----------------+------------------------+