diff --git a/main.py b/main.py
index 4c0c135f61696bcf42c375ca5ab62aa5b105afc8..d0445971c0df3a71d589c97f75d671208b0df62f 100644
--- a/main.py
+++ b/main.py
@@ -1 +1,17 @@
-print('欢迎来到 InsCode')
\ No newline at end of file
+# Welcome to your new notebook
+# Type here in the cell editor to add code!
+from datetime import datetime, timedelta, date, time
+import pandas as pd
+import numpy as np
+import time
+import math
+from pandas.tseries.offsets import MonthBegin,MonthEnd
+# import datetime
+import functools
+from datetime import date
+from pyspark.sql import SparkSession
+spark = SparkSession.builder \
+    .appName("differences") \
+    .config("spark.kryoserializer.buffer.max", "2047m") \
+    .getOrCreate()
+!free -m