如何向列表中的每個項目添加文本

Question

我想在列表中的每個項目中添加文本，然后將其重新添加到列表中。

例

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

我想要輸出（我喜歡餡餅，我喜歡蘋果，我喜歡面包）

它打印出的東西（hI like，pI like，pI like）

Answer 1

你應該避免在另一行上聲明短語，這是應該制作它的樣本。

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

在您的代碼中，您可能編寫的代碼太快，因為您正在重新分配短語的值與for phrase in foods的for phrase in foods 。 此外，當你做phrase + foods食品是一個不能與字符串連接的列表

Answer 2

我更喜歡字符串格式：

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

您還可以創建容器並使用.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']

您的代碼中的問題是您錯誤地使用了迭代器。