Lambda calculus it’s not a new. Alonzo Church formalized this calculus in 1930’s.
Lambda can be undertand with a anonymous function. Yes, in Python, Lambda is a function.
To use in Python it’s very simple. Follow the example:
xpto = lambda x : x * 120
In the example before, our lambda function receive one argument and return the multiply by 120.
We can make lambda functions better. For example, give a list, we want take the value more near of zero, but for example, there are -1 and 1, the positive value is printed.
With Lambda:
result = [-2,-3,-1, 1,3,2]
print(min(result, key=lambda v: (abs(v), v < 0)))
In this case, we’re using the function min that receive a lambda function that use abs to calculate the value.
For more references: Doc
and that’s all folks!
If you have any doubts, problems or suggestions, just leave a message.