如何向列表中的每个项目添加文本

Question

I want to add text to each item in a list and then it back into the list.

Example

foods = [pie,apple,bread]
phrase = ('I like')
statement = [(phrase) + (foods) for phrase in foods]

I want to have the output (I like pie, I like apple, I like bread)

It prints out something along the lines of (hI like,pI like,pI like)

Answer 1

You should avoid declaring phrase on another line, here is the sample that should make it.

statement = ['I like ' + food for food in foods]  # Note the white space after I like

In your code you probably coded it too quickly because you are reasigning the value of phrase with the for phrase in foods . Also when you do phrase + foods foods is a list which cannot be concatenated with string

Answer 2

I prefer string formatting:

foods = ['pie','apple','bread']

phrase = 'I like'

statement = ['{0} {1}'.format(phrase, j) for j in foods]

# Python 3.6+
statement = [f'{phrase} {j}' for j in foods]

Answer 3

You can also create a container and use .format :

phrase = 'I like {}'
statement = [phrase.format(food) for food in ("pie","apple","bread")]

Answer 4

foods = ['pie','apple','bread']

phrase = 'I like'

statement = [phrase + ' ' + j for j in foods]

>>> statement
['I like pie', 'I like apple', 'I like bread']

The problem in your code was that you were using the iterator incorrectly.