python文档中推荐的regex模块支持这一点

words = {'he', 'or', 'low'}
p = regex.compile(r"\L<name>", name=words)
m = p.findall('helloworld')
print(m)

输出:

['he', 'low', 'or']

实现的一些细节:link

data = "firstName and favoriteFood"
mandatory_fields = ['firstName', 'lastName', 'age']


# for each
for field in mandatory_fields:
    if field not in data:
        print("Error, missing req field {0}".format(field));

# still fine, multiple if statements
if ('firstName' not in data or 
    'lastName' not in data or
    'age' not in data):
    print("Error, missing a req field");

# not very readable, list comprehension
missing_fields = [x for x in mandatory_fields if x not in data]
if (len(missing_fields)>0):
    print("Error, missing fields {0}".format(", ".join(missing_fields)));

如果a或str中的字符串变长，您应该小心。简单的解决方案是O(S*(A^2))，其中S是str的长度，A是A中所有字符串长度的总和。要获得更快的解决方案，请查看用于字符串匹配的Aho-Corasick算法，该算法在线性时间O(S+A)内运行。

你可以使用任何:

a_string = "A string is more than its parts!"
matches = ["more", "wholesome", "milk"]

if any([x in a_string for x in matches]):

类似地，要检查是否找到列表中的所有字符串，请使用all而不是any。

如果你想要的只是True或False, any()是目前为止最好的方法，但如果你想知道具体匹配哪个字符串/字符串，你可以使用一些东西。

如果你想要第一个匹配(默认为False):

match = next((x for x in a if x in str), False)

如果你想获得所有匹配项(包括重复项):

matches = [x for x in a if x in str]

如果你想获得所有非重复的匹配(不考虑顺序):

matches = {x for x in a if x in str}

如果你想按正确的顺序获得所有非重复的匹配项:

matches = []
for x in a:
    if x in str and x not in matches:
        matches.append(x)

的元素上进行迭代。

a = ['a', 'b', 'c']
str = "a123"
found_a_string = False
for item in a:    
    if item in str:
        found_a_string = True

if found_a_string:
    print "found a match"
else:
    print "no match found"