What does the expression do?
my_tuple = (0, 1, 2, 3, 4, 5)
foo = list(filter(lambda x: x-0 and x-1, my_tuple))
print(foo)
What output is to be expected from above equation?
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lambda is a quick way to create a one liner function, where the left side of the : is the function’s argument and the right side is the returned value.
Let’s break this expression down, working from the inside out:
lambda x:x-0 and x-1is a function that takesx, calculatesx-0(which is justx),x-1and performs a logical “and” operation between them. This function will returnTrueif both sides of theandare not zero. In other words, it will returnTrueifxis neither0nor1.filter(lambda x:x-0 and x-1, my_tuple)takesmy_tuple, and evaluates every element with the function defined above, keeping only those that returnTrue- Applying
listto the result of thefiltercall converts the resultingfilterobject to a list.
So, to summarize – this call retuns a list containing all the elements in my_tuple that aren’t 0 or 1.