正則表達式拆分含連字符的單詞串

Question

我有以下字符串：

test_string = '"abc" + "def" + "-xyz - rst"' 

我試圖分裂基礎上，這個字符串 - 或+運營商只，但不包括連字符的話，從這個表達式拆分。我能走到今天：

In [205]: [n.strip() for n in re.split(r'[ ]{1}[-+]', test_string) if n != ''] 
Out[205]: ['"abc"', '"def"', '"-xyz', 'rst"'] 

我期待我的結果是：

In [205]: [n.strip() for n in re.split(r'[ ]{1}[-+]', test_string) if n != ''] 
Out[205]: ['"abc"', '"def"', '"-xyz - rst"'] 

我缺少什麼？謝謝。

Answer 1

考慮使用shlex：

import shlex 
test_string = '"abc" + "def" + "-xyz - rst"' 
# Parse the string into space-separated elements treating quotes as the shell does 
# lone + and - signs will be their own element 
arr = shlex.split(test_string) 
# remove any element that is either '+' or '-' 
final_arr = [x for x in arr if x not in ['+', '-']] 

變量：

>>> print(arr) 
['abc', '+', 'def', '+', '-xyz - rst'] 
>>> print(final_arr) 
['abc', 'def', '-xyz - rst']