获取list-python中单词中字母的索引

Question

我有一个长列表，里面有很多单词，我想创建一个只包含单词的新列表以"；a"；。

list_1 = []
for i in range(len(words) - 1):
if words[0: len(words) - 1][0] == "a":
list_1.append(words)
print(list_1)

Answer 1

您可以使用startswith

list_1 = [x for x in words if x.startswith('a')]

Answer 2

尝试：

list_1= [word for word in words if word[0] =='a']

Answer 3

方法1-

list_1 = []
for i in range(len(words) - 1):
if words[i][0] == "a":
list_1.append(words)
print(list_1)

方法2

list_1= [word for i in words if word[0] =='a']

Answer 4

old_list = ['hello', 'world', 'alike', 'algorithm']
new_list = [i for i in old_list if i.startswith('a')]

现在打印new_list将给出[类似，算法]

Answer 5

查看

for i in range(len(words) - 1):
if words[0] == "a":
list_1.append(words)
print(list_1)