我们可以利用Counter类来判断一个列表中是否有重复的元素。 fromcollectionsimportCounterdefcheck_duplicates(lst):counter=Counter(lst)returnany(count>1forcountincounter.values())data=[1,2,3,4,5,1]ifcheck_duplicates(data):print("List contains duplicates")else:print("List does not contain duplicates")...
在这个判断重复值的情况下,设计一个简单的类来封装逻辑也是一个好主意。 ListChecker+list my_list+set unique_values+check_duplicates() : void+add_value(value) : void 这个类ListChecker负责检查一个列表中的重复值,实现一个check_duplicates方法来执行这一检查,并定义一个add_value方法用于添加值到集合中。
Check if an element exists in a list in Python by leveraging various efficient methods, each suited to different scenarios and requirements. This article will guide you through the multitude of ways to determine the presence of an element within a list, ranging from the straightforward in operator...
class TestRelation(): definit(self): super(TestRelation, self).init()获取目标文件数据 self.data = "./relation.xls" self.data_content = pd.DataFrame(pd.read_excel(self.data)>) self.character = self.data_content'character1'.>drop_duplicates().values.tolist() self.characters = self.data_...
If you need to de-duplicate while maintaining the order of your items, use dict.fromkeys instead:>>> unique_items = list(dict.fromkeys(original_items)) That will de-duplicate your items while keeping them in the order that each item was first seen....
1. Using theinOperator (Fastest for Membership Testing) Theinoperator is the most straightforward way to check if a string is present in a list. It is also the fastest method for membership testing, making it a great choice for simple checks. Here’s an example of how to use it: ...
if identifier not in used: used.add(identifier) break 所使用的集合实际上是持久存储的。我不喜欢这段代码,尽管我有一个程序,当它找不到未使用的UUID时,它会以无限循环结束。 有些文档数据库提供自动的UUID分配,它们在内部为您提供这种分配,以确保给定的数据库实例永远不会以具有相同UUID的两个文档结束。
[72]: ACTIVITY_DATE OWNNER_ID OWNER_NAME0 1/1/2020 23344 JAMES NELSON1 2/1/2020 33445 NIGEL THOMAS 或者,如果您只想提供要比较的列的子集,可以这样做: In [77]: df.drop_duplicates(subset=['ACTIVITY_DATE','OWNNER_ID'])Out[77]: ACTIVITY_DATE OWNNER_ID OWNER_NAME0 1/1/2020 23344 ...
How to check if a list contains elements of another list ? check = all(item in List1 for item in List2) check = any(item in List1 for item in List2) Check if Python List Contains Elements of Another List https://www.techbeamers.com/program-python-list-contains-elements/ Built-in...
# List Python files in the directory python_files = [fileforfileinos.listdir(directory)iffile.endswith('.py')] ifnotpython_files: print("No Python files found in the specified directory.") return # Analyze each Python file using pylint and f...