Hi, I see the description of lambda at the online tutorial, but I cannot understand it. '42' is transferred to the function. What 'x' value should be? I do not see it says that it is '0'. And, what is 'x'?
>>> def make_incrementor(n): ... return lambda x: x + n ... >>> f = make_incrementor(42) >>> f(0) 42 >>> f(1) 43 The second lambda example is even more obscure to me: >>> pairs = [(1, 'one'), (2, 'two'), (3, 'three'), (4, 'four')] >>> pairs.sort(key=lambda pair: pair[1]) >>> pairs [(4, 'four'), (1, 'one'), (3, 'three'), (2, 'two')] Could you explain 'key=lambda pair: pair[1]' to me? Python grammar seems too succinct to me. Thanks, -- https://mail.python.org/mailman/listinfo/python-list
