add a character to each item in a list

问题:

Suppose I have a list of suits of cards as follows:

suits = ["h","c", "d", "s"]

and I want to add a type of card to each suit, so that my result is something like

aces = ["ah","ac", "ad", "as"]

is there an easy way to do this without recreating an entirely new list and using a for loop?

回答1:

This would have to be the 'easiest' way

>>> suits = ["h","c", "d", "s"] >>> aces = ["a" + suit for suit in suits] >>> aces ['ah', 'ac', 'ad', 'as'] 

回答2:

Another alternative, the map function:

aces = map(( lambda x: 'a' + x), suits) 

回答3:

If you want to add something different than always 'a' you can try this too:

foo = ['h','c', 'd', 's'] bar = ['a','b','c','d'] baz = [x+y for x, y in zip(foo, bar)] >>> ['ha', 'cb', 'dc', 'sd'] 

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