Python set difference 集合求差集

环境信息

• ModelArts
  • Notebook - Multi-Engine 2.0 (python3)
    • JupyterLab - Notebook - Conda-python3

Python set difference 集合求差集

# list
col_name_dataset_a = ['a','b','c','d']
col_name_dataset_b = ['b','c','d','e']

# list -> set
# 在a，不在b
set(col_name_dataset_a).difference(set(col_name_dataset_b))

{'a'}

# 在b，不在a
# 应用场景之一是：比较两个数据集的特征维度，看看相互之间差在哪里了
set(col_name_dataset_b).difference(set(col_name_dataset_a))

{'e'}

help

help(set.difference)

Help on method_descriptor:

difference(...)
    Return the difference of two or more sets as a new set.
    
    (i.e. all elements that are in this set but not the others.)

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