Learn Python DECORATORS in 10 mins
A decorator in Python is a function that takes another function, adds extra functionality to it, and returns the modified function without changing the original function’s code.
from datetime import datetime
def etl_logs(func): # handle_failure(load_table)
def wrapper(*args,**kwargs):
print("load starting")
print("start time", datetime.now())
func(*args,**kwargs)
print("load done")
print("end time", datetime.now())
return wrapper
def handle_failure(func): #etl_logs(load_table))
def wrapper(*args, **kwargs):
try:
func(*args, **kwargs)
except Exception as e:
print("job failed")
print("error:", e)
return wrapper
handle_failure(etl_logs(load_table))
@handle_failure
@etl_logs
def load_table(tablename , schema , databasename):
write code here
print(f"loading data into {databasename}.{schema}.{tablename}")
a=1/0
print(a)
load_table('sales', 'dbo' ,'namastesql')
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