我有一个包含很多标记二元组的列表。有些二元组没有正确标记，所以我想将它们从主列表中删除。二元组中的一个单词经常重复，因此如果它包含 xyz 单词，我可以删除该二元组。伪示例如下:
master_list = ['this is', 'is a', 'a sample', 'sample word', 'sample text', 'this book', 'a car', 'literary text', 'new book', 'them about', 'on the' , 'in that', 'tagged corpus', 'on top', 'a car', 'an orange', 'the book', 'them what', 'then how']
unwanted_words = ['this', 'is', 'a', 'on', 'in', 'an', 'the', 'them']
new_list = [item for item in master_list if not [x for x in unwanted_words] in item]
我可以单独删除这些项目，即每次创建列表并删除包含“on”一词的项目时。这很乏味，并且需要数小时的过滤和创建新列表来过滤每个不需要的单词。我认为循环会有帮助。但是，我收到以下类型错误:
Traceback (most recent call last):
File "<pyshell#21>", line 1, in <module>
new_list = [item for item in master_list if not [x for x in unwanted_words] in item]
File "<pyshell#21>", line 1, in <listcomp>
new_list = [item for item in master_list if not [x for x in unwanted_words] in item]
TypeError: 'in <string>' requires string as left operand, not list
非常感谢您的帮助!
最佳答案
您的条件 if not [x for x in irreversible_words] in item 与 if not irreversible_words in item 相同，即您正在检查列表是否 包含在字符串中。
相反，您可以使用 any检查二元组的任何部分是否在 unwanted_words 中。另外，您可以将 unwanted_words 设置为 set 以加快查找速度。
>>> master_list = ['this is', 'is a', 'a sample', 'sample word', 'sample text', 'this book', 'a car', 'literary text', 'new book', 'them about', 'on the' , 'in that', 'tagged corpus', 'on top', 'a car', 'an orange', 'the book', 'them what', 'then how']
>>> unwanted_words = set(['this', 'is', 'a', 'on', 'in', 'an', 'the', 'them'])
>>> [item for item in master_list if not any(x in unwanted_words for x in item.split())]
['sample word', 'sample text', 'literary text', 'new book', 'tagged corpus', 'then how']
关于loops - 从 Python 3.x 中的另一个列表中删除单独的项目列表，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29188896/