Concatenate list of string in Python

Question

Hello enthusiast programmers, It seems I am very bad at manipulating lists in Python (I come from the IDL world, and I really struggle with Python). I have a list of string, say:

mylist =['boring', 'enjoyable', 'great']

and a string, say:

s = 'Python is '

and I want to build the list: ['Python is boring', 'Python is enjoyable', 'Python is great']

mynewlist = s + l

as I would have simply done in IDL, doesn't work of course ... I am not able to do it simply! (i.e. without a loop and intermediate variables)

Thanks for the help!

s.

Amadan · Accepted Answer · 2015-10-15 07:20:28Z

2

Use map or list comprehensions:

map(lambda x: "Python is " + x, mylist)

["Python is " + x for x in mylist]

Both solutions will do an implicit loop, just like IDL would; it is inevitable to have one in this scenario. But no overt loop like for ...:.

answered Oct 15, 2015 at 7:20

Amadan

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jake77 · Accepted Answer · 2015-10-15 07:19:48Z

2

that would be:

newlist = [s + x for x in mylist]

You basically carry out the same addition for each element of mylist; the result is a list itself. The way it is done is called list comprehension, one of the most powerful tools for list manipulation.

answered Oct 15, 2015 at 7:19

jake77

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