Wrong examples for Lambda operator?

General
1

Course Name: Python for Trading: Basic, Section No: 6, Unit No: 7, Unit type: Notebook

In the part related to Lambda operator the examples are for the function definition not usage of Lambda operator. Can be this corrected then ?

2

Hi Piotr,

Thanks for the feedback!

We’ll work on making the section clearer with a simpler explanation of the difference between defining functions using def and the lambda operator, and when to use each one based on the need.

Here’s a quick explanation to help you:

In Python, both def and lambda are used to define functions, but they serve different purposes:

  • def is used to define regular named functions, usually when the function contains multiple lines or more complex logic.
  • lambda is used to create small, one-line anonymous functions (functions without a name), typically used for short tasks like in map() or filter()as is also explained in the unit.

Try this example—both versions do the same thing, just written differently:

def add_df(x, y): 
    return x + y

add_lambda = lambda x, y: x + y # named version of lambda for comparison with def

print(add_df(5, 3))       
print(add_lambda(5, 3))

I hope it helps.