Adding letters to each element of a list-CodePudding

I try to add "G:" in the beginning and a backslash before every point of each element in a list. Therefore I created this example list1:

list1 = ['AEX.EN', 'AXAL.OQ', 'AAPIOE.NW']

And I need something like list2:

list2 = ['G:AEX\.EN', 'G:AXAL\.OQ', 'G:AAPIOE\.NW']

Thank you very much for the help!

CodePudding user response：

Use:

>>> ['G:'   i.replace('.', '\\.') for i in list1]
['G:AEX\\.EN', 'G:AXAL\\.OQ', 'G:AAPIOE\\.NW']
>>>

In this case I prefer re.escape:

>>> import re
>>> ['G:'   re.escape(i) for i in list1]
['G:AEX\\.EN', 'G:AXAL\\.OQ', 'G:AAPIOE\\.NW']
>>>

CodePudding user response：

You can use for join string then use replace() like below:

>>> list1 = ['AEX.EN', 'AXAL.OQ', 'AAPIOE.NW']

>>> [('G:' l).replace('.','\.') for l in list1]
['G:AEX\\.EN', 'G:AXAL\\.OQ', 'G:AAPIOE\\.NW']