Python拆分字符串数组

Question

我有一个Python列表，它看起来像这样：

["Hello, My Name is John", "Good Afternoon, my name is David", "I am three years old"]

我希望将每个字符串分割成逗号分隔列表并存储结果，同时将每个单词转换为小写：

[['hello','my','name','is','john'], ['good','afternoon','my','name','is','david'],['i','am','three','years','old']]

有什么建议可以实现这个吗？ 谢谢。

- Thomas Moore

---

[[j.lower() for j in i.replace(",","").split()] for i in mylist] - itzMEonTV

@itzMEonTV 你忘了去掉逗号。 - kerwei

Answer 1

你可以简单地用空格替换逗号，并去掉字符串的其余部分。

strList = ["Hello, My Name is John", "Good Afternoon, my name is David", "I am three years old"]
[i.lower().replace(',', '').split() for i in strList]

- sanyam

Answer 2

你可以拆分每个字符串，然后过滤掉逗号，得到你想要的列表。

a = ["Hello, My Name is John", "Good Afternoon, my name is David", "I am three years old"]
b = [[j.lower().replace(',', '') for j in i.split()] for i in a]

b
'''
Outputs:[['hello', 'my', 'name', 'is', 'john'],
         ['good', 'afternoon', 'my', 'name', 'is', 'david'],
         ['i', 'am', 'three', 'years', 'old']]
'''

- Osman Mamun

---

就快了……hello保留了逗号，我认为你想要的不是j!= ','，因为这里的j是每个单词 :) - LeKhan9

Answer 3

请尝试以下代码：

x = ["Hello, My Name is John", "Good Afternoon, my name is David", "I am three years old"]

z = []

for i in x:
    # Replacing "," , converting to lower and then splitting
    z.append(i.replace(","," ").lower().split())

print z

输出：

[['hello', 'my', 'name', 'is', 'john'], ['good', 'afternoon', 'my', 'name', 'is', 'david'], ['i', 'am', 'three', 'years', 'old']]

- skaul05

Answer 4

import re

def split_and_lower(s): 
    return list(map(str.lower, re.split(s, '[^\w]*'))) 

L = ["Hello, My Name is John", "Good Afternoon, my name is David", "I am three years old"] 
result = list(map(split_and_lower, L))
print(result)

输出：

[['hello', 'my', 'name', 'is', 'john'],
 ['good', 'afternoon', 'my', 'name', 'is', 'david'],
 ['i', 'am', 'three', 'years', 'old']]

- BallpointBen

Answer 5

我会选择使用replace和split。

strlist = ["Hello, My Name is John", "Good Afternoon, my name is David", "I am three years old"]
>>>[x.replace(',','').lower().split() for x in strlist]
[['hello', 'my', 'name', 'is', 'john'], ['good', 'afternoon', 'my', 'name', 'is', 'david'], ['i', 'am', 'three', 'years', 'old']]

- kerwei

Answer 6

一种使用rstrip对每个单词进行处理的方法 :)

ls = ["Hello, My Name is John", "Good Afternoon, my name is David", "I am three years old"]

output_ls = [[word.lower().rstrip(',') for word in sentence.split()] for sentence in ls]

输出：

[['hello', 'my', 'name', 'is', 'john'], ['good', 'afternoon', 'my', 'name', 'is', 'david'], ['i', 'am', 'three', 'years', 'old']]

- LeKhan9