如何知道python中的列表是否包含除'apples'
和'oranges'
之外的其他元素。
fruits = ['apples', 'oranges']
现在,如果列表结果包含任何其他字符串,则假定:
fruits = ['apples', 'oranges', grapes']
要么
fruits = ['oranges', grapes']
如何检查?
答案 0 :(得分:1)
尝试以下代码:
fruits = ['apples', 'oranges', 'grapes']
for i in fruits:
if i not in ['apples','oranges']:
print i # Mismatched values will be printed
输出:
grapes
答案 1 :(得分:1)
您可以使用set object:
target = ['apples', 'oranges']
fruits = ['apples', 'oranges', 'grapes', 'whatever']
set(fruits) - set(target)
#=> {'whatever', 'grapes'}
答案 2 :(得分:0)
尝试一下:
nlr <- nls(formula = valuerange1 ~ exp(m1*temp), data = list(temp,valuerange1), start= list(m1=0.001))
输出:
f = ['apples', 'oranges', 'grapes']
any(x not in ['apples', 'oranges'] for x in f)
答案 3 :(得分:0)
如果您想要另一个列表,其中项目与'apples'
或'oranges'
分开,请尝试以下操作:
fruits = [i for i in fruits if i not in ['apples', 'oranges']]
答案 4 :(得分:0)
您可以使用filter
列表:
fruits_list = ['apples', 'oranges', 'mangoes']
filter_list = ['apples', 'oranges']
print([x for x in fruits_list if x not in filter_list])
输出:
['mangoes']
答案 5 :(得分:0)
如果列表中有多个“橙色”,您期望什么行为? 我考虑忽略所有加倍元素。
一旦从检查列表中找到其他任何元素,该函数应停止检查。
def check_if_there_something_else(original_list: list, checking_for: list):
for fruit in original_list:
if fruit not in checking_for:
return True
return False
original_list = ['oranges', 'oranges', 'grapes']
checking_for = ['oranges', 'grapes']
print(check_if_there_something_else(original_list, checking_for))
错误
original_list = ['oranges', 'oranges', 'grapes', 'grapes', 'grapes', 'kiwi']
checking_for = ['oranges', 'grapes']
print(check_if_there_something_else(original_list, checking_for))
是
您可以通过查找集合之间的差异来进行几乎相同的检查,但是创建两个新对象看起来很多余:
print(any(set(original_list).difference(checking_for)))
是