检查一个列表是否是Python中其他列表的子集
在文本分析和数据分析的其他各个领域中，通常需要查找给定列表是否已经是更大列表的一部分。在本文中，我们将看到实现此要求的python程序。
所有
我们使用for循环来检查较小列表中的每个元素是否在较大列表中。all函数可确保每次评估返回true。
示例
Alist = ['Mon','Tue', 5, 'Sat', 9]
Asub_list = ['Tue',5,9]
# Given list and sublist
print("Given list ",Alist)
print("Given sublist",Asub_list)
# With all
if (all(x in Alist for x in Asub_list)):
print("Sublist is part of bigger list")
else:
print("Sublist is not part of bigger list")
# Checkign again
Asub_list = ['Wed',5,9]
print("New sublist",Asub_list)
if (all(x in Alist for x in Asub_list)):
print("Sublist is part of bigger list")
else:
print("Sublist is not part of bigger list")输出结果
运行上面的代码给我们以下结果-
Given list ['Mon', 'Tue', 5, 'Sat', 9] Given sublist ['Tue', 5, 9] Sublist is part of bigger list New sublist ['Wed', 5, 9] Sublist is not part of bigger list
带子集
在这种方法中，我们将列表转换为集合，并使用子集函数来验证小列表是否是大列表的一部分。
示例
Alist = ['Mon','Tue', 5, 'Sat', 9]
Asub_list = ['Tue',5,9]
# Given list and sublist
print("Given list ",Alist)
print("Given sublist",Asub_list)
# With all
if(set(Asub_list).issubset(set(Alist))):
print("Sublist is part of bigger list")
else:
print("Sublist is not part of bigger list")
# Checkign again
Asub_list = ['Wed',5,9]
print("New sublist",Asub_list)
if(set(Asub_list).issubset(set(Alist))):
print("Sublist is part of bigger list")
else:
print("Sublist is not part of bigger list")输出结果
运行上面的代码给我们以下结果-
Given list ['Mon', 'Tue', 5, 'Sat', 9] Given sublist ['Tue', 5, 9] Sublist is part of bigger list New sublist ['Wed', 5, 9] Sublist is not part of bigger list
使用路口
相交函数可以找到两个集合之间的公共元素。在这种方法中，我们将列表转换为集合并应用交集函数。如果相交的结果与子列表相同，则我们得出子列表是该列表的一部分的结论。
示例
Alist = ['Mon','Tue', 5, 'Sat', 9]
Asub_list = ['Tue',5,9]
# Given list and sublist
print("Given list ",Alist)
print("Given sublist",Asub_list)
# With all
if(set(Alist).intersection(Asub_list)== set(Asub_list)):
print("Sublist is part of bigger list")
else:
print("Sublist is not part of bigger list")
# Checkign again
Asub_list = ['Wed',5,9]
print("New sublist",Asub_list)
if(set(Alist).intersection(Asub_list)== set(Asub_list)):
print("Sublist is part of bigger list")
else:
print("Sublist is not part of bigger list")输出结果
运行上面的代码给我们以下结果-
Given list ['Mon', 'Tue', 5, 'Sat', 9] Given sublist ['Tue', 5, 9] Sublist is part of bigger list New sublist ['Wed', 5, 9] Sublist is not part of bigger list