删除Python字典中的某些元素

Question

我有一本字典和一个列表。我想从字典中删除出现在列表中的那些值（如果这些值出现在字典中）。这些元素可以多次出现在字典中。

例如：
my_dic={'key1':['a','b','c'],'key5':['d','a','e']}。
我想在不调用键（键1和键5）的情况下删除值'a'和'c'。

我该怎么办？

Answer 1

像这样的事情，我认为

lst = ['val1','val2','val3'] 
dct = { 
    'key1': ['val1','val6'], 
    'key2': ['val2','val45'], 
    'key3': ['val52','val48'] 
} 

for key in dct.keys(): 
    vals = dct[key] 
    for value in vals: 
     if value in lst: 
      while value in vals: 
       vals.remove(value) 
    dct[key] = vals 


print dct >>> {'key3': ('val52', 'val48'), 'key2': ('val45',), 'key1': ('val6',)} 

Answer 2

target_dict = {'key1':['a','b','c'],'key5':['d','a','e']} 
values_to_detele = ['a', 'c'] 
In [225]: for val_list in target_dict.itervalues(): 
    for del_val in values_to_detele: 
     while del_val in val_list: 
      val_list.remove(del_val) 
    .....:    

In [226]: target_dict 
Out[226]: {'key1': ['b'], 'key5': ['d', 'e']}