Returning Values¶
Let us understand more about returning values to the caller.
- We typically have one or more return statements inside the function body.
- The statement
returnexits a function, we can return back an expression or variable or object to the caller. A return statement with no expression is the same as return None. - If there is no return statement in the function body then the function returns None object.
- We can return multiple expressions in Python.
In [1]:
def get_commission_amount(sales_amount, commission_pct):
"""Function to compute commission amount. commission_pct should be passed as percent notation (eg: 20%)
20% using percent notation is equal to 0.20 in decimal notation.
"""
commission_amount = (sales_amount * commission_pct / 100) if commission_pct else 0
return commission_amount
In [2]:
get_commission_amount(1000, 20)
Out[2]:
200.0
In [3]:
def get_phone_count(employee_id: int, phone_numbers: list):
valid_count = 0
invalid_count = 0
for phone_number in phone_numbers:
if len(phone_number) != 10:
invalid_count += 1
else:
valid_count += 1
return valid_count, invalid_count
In [4]:
get_phone_count(1, ['1234567890', '245 789 1234', '+1 156 290 1489'])
Out[4]:
(1, 2)