Python analog for Groovy's it?

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Groovy has nice syntax for simple clojures, which eliminates the need to explitly name the single parameter. It will be named it by default.

def closure = { print it }
closure( "hi there" ) //prints "hi there"

What is the best way to emulate it magikal parameter in Python?

Example of what I want:

>>> it = It()
>>> print map(it + 5, [1, 2, 3])
[6, 7, 8]
3

There are 3 answers

0
uhbif19 On BEST ANSWER

So far I have found the exact anwser on my question. This is the library fn.py which implements _ magikal variable and some usable functional programming conceptions.

Example of use:

>>> from fn import _
>>> list(map(_ * 2, range(5)))
[0,2,4,6,8]
0
uhbif19 On

My first thougt is to do some magikal it object with magik methods producing curryied function.

class It :
    def __add__(self, another_one) :
         return lambda x: x + another_one



it = It()
print map(it + 5, [1, 2, 3])
0
Martijn Pieters On

You just give your lambda or function an explicit first argument:

lambda it: ' {}'.format(it)

This fits with the Zen of Python:

Explicit is better than implicit