1. Python Set()从列表中获取唯一值 (1. Python Set() to Get Unique Values from a List) As seen in our previous tutorial onPython Set, we know that Set stores a single copy of the duplicate values into it. This property of set can be used to get unique values from a list in Python...
6]# 使用numpy库找出重复元素的位置my_list_array=np.array(my_list)unique_elements,counts=np.unique(my_list_array,return_counts=True)# 输出重复元素的位置forelement,countinzip(unique_elements,counts):ifcount>1:indexes=np.where(my_list_array==element)[0]print(f"元素{element}的位置是{indexes}"...
6、radiansdict.items():以列表返回可遍历的(键, 值) 元组数组 7、radiansdict.keys():以列表返回一个字典所有的键 8、radiansdict.setdefault(key, default=None):和get()类似, 但如果键不已经存在于字典中,将会添加键并将值设为default 9、radiansdict.update(dict2):把字典dict2的键/值对更新到dict里 1...
from collections import Counter my_list = [1, 2, 2, 3, 4, 4, 5] counter = Counter(my_list) unique_items = [x for x in my_list if counter[x] == 1] print(unique_items) 推荐的腾讯云相关产品:腾讯云数据库(TencentDB),产品介绍链接地址:https://cloud.tencent.com/product/cdb ...
).resolve() for i in (this_dir).rglob("[!~$]*.xls*"): print(i) os操作 #import os package import os 获取当前路径 #Get the path of the current working directory os.getcwd() 获取当前路径下的所有文件 #Get a list of the files under the specified path os.listdir(os.getcwd()) ...
list 对象去重 def distinct_by(lst, key): seen_values=set() unique_items=[]foriteminlst:ifitem[key] notinseen_values: unique_items.append(item) seen_values.add(item[key]) seen_values=Nonereturnunique_items 过滤: my_list =[] my_list.append({"sea1":1,"age":2}) ...
tmpList = platformDict.get( p, [] )forppinplatformDict:ifpinplatformDict[pp]: tmpList.append( pp ) tmpList += platformDict[pp]iftmpList: resultList += tmpListreturnS_OK(uniqueElements( resultList ) ) 开发者ID:graciani,项目名称:DIRAC,代码行数:28,代码来源:Resources.py ...
# list elements get converted to dictionary keys. Keys are always unique! x = dict.fromkeys(li) # storing the keys of the dictionary in a list l2 =list(x.keys()) print("Number of unique values in the list:",len(l2)) # Number of unique values in the list: 4 ...
unique_nums = {1, 2, 3, 3, 4} # 集合,自动去重后为{1, 2, 3, 4}第2章 可变类型详解2.1 可变类型的定义与特性 可变类型是Python中一类允许其内容在创建后发生改变的数据类型。理解并熟练运用这些类型,是实现动态数据管理、高效资源利用的关键。
list类型 遍历数组元素 # 直接遍历数组元素 a = [1,2,3,4,5] for elem in a: print(a) # 输出数组元素,1 2 3 4 5 # 根据下标遍历数组元素 a = [1,4, 3, 5, 2] for i in range(len(a)): print(a[i]) #把list变成类似于java的下标-元素遍历,使用`enumerate()` ...