Concatenate string to the end of all elements of a list in python

问题

I would like to know how to concatenate a string to the end of all elements in a list.

For example:

List1 = [ 1 , 2 , 3 ]
string = "a"

output = ['1a' , '2a' , '3a']

回答1:

rebuild the list in a list comprehension and use str.format on both parameters

>>> string="a"
>>> List1 = [ 1 , 2 , 3 ]
>>> output = ["{}{}".format(i,string) for i in List1]
>>> output
['1a', '2a', '3a']

回答2:

In one line:

>>> lst = [1 , 2 , 3]
>>> my_string = 'a'
>>> [str(x) + my_string for x in lst]
['1a', '2a', '3a']

You need to convert the integer into strings and create a new strings for each element. A list comprehension works well for this.

回答3:

L = [ 1, 2, 3 ]
s = "a"
print map(lambda x: str(x)+s, L);

output ['1a', '2a', '3a']

回答4:

You can use map:

List1 = [ 1 , 2 , 3 ]
string = "a"
new_list = list(map(lambda x:"{}{}".format(x, string), List1))

Output:

['1a', '2a', '3a']

回答5:

result = map(lambda x:str(x)+'a',List1)

回答6:

List1 = [ 1 , 2 , 3 ]
str1="a"
new_list = []
for item in List1:
    new_list.append(str(item)+str1)
print(new_list)

Convert each element in the list to string and then add the required string to each element of the list.

回答7:

A 1 liner:

List1= [s + a for s in List1]

来源：https://stackoverflow.com/questions/48243018/concatenate-string-to-the-end-of-all-elements-of-a-list-in-python