import ast
l = ast.literal_eval('[ "A","B","C" , " D"]')
l = [i.strip() for i in l]

有一个快速解决方案：

x = eval('[ "A","B","C" , " D"]')

可以通过以下方式删除列表元素中不需要的空白：

x = [x.strip() for x in eval('[ "A","B","C" , " D"]')]

这个解决方案比我在前面的答案中看到的一些简单，但它需要匹配列表中的所有功能。

x = '[ "A","B","C" , " D"]'
[i.strip() for i in x.split('"') if len(i.strip().strip(',').strip(']').strip('['))>0]

输出：

['A', 'B', 'C', 'D']

为了使用JSON进一步完成Ryan的回答，一个非常方便的Unicode转换函数就在这个答案中。

带双引号或单引号的示例：

>print byteify(json.loads(u'[ "A","B","C" , " D"]')
>print byteify(json.loads(u"[ 'A','B','C' , ' D']".replace('\'','"')))
['A', 'B', 'C', ' D']
['A', 'B', 'C', ' D']

import ast
l = ast.literal_eval('[ "A","B","C" , " D"]')
l = [i.strip() for i in l]

不需要导入任何内容或进行评估。对于大多数基本用例，包括原始问题中给出的用例，您可以在一行中完成此操作。

一个衬垫

l_x = [i.strip() for i in x[1:-1].replace('"',"").split(',')]

解释

x = '[ "A","B","C" , " D"]'
# String indexing to eliminate the brackets.
# Replace, as split will otherwise retain the quotes in the returned list
# Split to convert to a list
l_x = x[1:-1].replace('"',"").split(',')

输出：

for i in range(0, len(l_x)):
    print(l_x[i])
# vvvv output vvvvv
'''
 A
B
C
  D
'''
print(type(l_x)) # out: class 'list'
print(len(l_x)) # out: 4

您可以根据需要使用列表理解来解析和清理此列表。

l_x = [i.strip() for i in l_x] # list comprehension to clean up
for i in range(0, len(l_x)):
    print(l_x[i])
# vvvvv output vvvvv
'''
A
B
C
D
'''

嵌套列表

如果您有嵌套列表，它确实会变得有点烦人。如果不使用正则表达式（这将简化替换），并且假设您希望返回一个扁平列表（python的zen表示扁平优于嵌套）：

x = '[ "A","B","C" , " D", ["E","F","G"]]'
l_x = x[1:-1].split(',')
l_x = [i
    .replace(']', '')
    .replace('[', '')
    .replace('"', '')
    .strip() for i in l_x
]
# returns ['A', 'B', 'C', 'D', 'E', 'F', 'G']

如果您需要保留嵌套列表，它会变得有点难看，但仍然可以通过正则表达式和列表理解来完成：

import re

x = '[ "A","B","C" , " D", "["E","F","G"]","Z", "Y", "["H","I","J"]", "K", "L"]'
# Clean it up so the regular expression is simpler
x = x.replace('"', '').replace(' ', '')
# Look ahead for the bracketed text that signifies nested list
l_x = re.split(r',(?=\[[A-Za-z0-9\',]+\])|(?<=\]),', x[1:-1])
print(l_x)
# Flatten and split the non nested list items
l_x0 = [item for items in l_x for item in items.split(',') if not '[' in items]
# Convert the nested lists to lists
l_x1 = [
    i[1:-1].split(',') for i in l_x if '[' in i
]
# Add the two lists
l_x = l_x0 + l_x1

最后一个解决方案可以处理任何以字符串形式存储的列表，无论是否嵌套。