我想做的事情是:
foo = {
'foo': 1,
'zip': 2,
'zam': 3,
'bar': 4
}
if ("foo", "bar") in foo:
#do stuff
我如何检查是否foo和酒吧都在dict foo?
我想做的事情是:
foo = {
'foo': 1,
'zip': 2,
'zam': 3,
'bar': 4
}
if ("foo", "bar") in foo:
#do stuff
我如何检查是否foo和酒吧都在dict foo?
当前回答
在确定是否只有一些键匹配的情况下,这是有效的:
any_keys_i_seek = ["key1", "key2", "key3"]
if set(my_dict).intersection(any_keys_i_seek):
# code_here
pass
还有另一个选项,如果只有一些键匹配:
any_keys_i_seek = ["key1", "key2", "key3"]
if any_keys_i_seek & my_dict.keys():
# code_here
pass
其他回答
检查字典中是否存在所有键:
{'key_1', 'key_2', 'key_3'} <= set(my_dict)
检查字典中是否存在一个或多个键:
{'key_1', 'key_2', 'key_3'} & set(my_dict)
>>> if 'foo' in foo and 'bar' in foo:
... print 'yes'
...
yes
Jason,()在Python中不是必需的。
并不是说这不是你没有想过的事情,但我发现最简单的事情通常是最好的:
if ("foo" in foo) and ("bar" in foo):
# do stuff
检测是否所有键都在字典中的另一个选项:
dict_to_test = { ... } # dict
keys_sought = { "key_sought_1", "key_sought_2", "key_sought_3" } # set
if keys_sought & dict_to_test.keys() == keys_sought:
# True -- dict_to_test contains all keys in keys_sought
# code_here
pass
如果你想:
还可以获取键的值 多查字典
然后:
from operator import itemgetter
foo = {'foo':1,'zip':2,'zam':3,'bar':4}
keys = ("foo","bar")
getter = itemgetter(*keys) # returns all values
try:
values = getter(foo)
except KeyError:
# not both keys exist
pass