On 7/11/19 18:10, Stephen Waldron wrote:
> What I'm aiming for is the ability to, within a function call, pass a suite
> that would be there automatically defined by the compiler/interpreter.
> Another comment did mention lambda functions, which does to some degree
> provide that capability, but is restricted to well, lambda functions (only
> expressions, not statements).
I don't think those restrictions are that limiting. Certainly not since
python3.8 and python acquired an assigment operator. And you should also
note that a list is an expression. So we could do something like the
following.
class Book:
def __init__(self, name, author):
self.name = name
self.author = author
def doToBooks (bookList, first, then, book = None):
for book in bookList:
first(book = book)
then(book = book)
myBooks = [
Book("The Way of the World", "Lucy Cole"),
Book("To Live or To Love", "Georgio Dunham"),
Book("Twelve Days of Success", "Anita Duvette")
]
import sys
write = sys.stdout.write
doToBooks (myBooks,
first = lambda book: [write(book.name), write("\n")],
then = lambda book: [write(" - "), write(book.author), write("\n")]
)
The above code will print the following:
The Way of the World
- Lucy Cole
To Live or To Love
- Georgio Dunham
Twelve Days of Success
- Anita Duvette
--
Antoon.
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