zeros((len(S1)-1, len(S2)-1)) # 计算二元子串的Jaccard相似度 for i in range(len(S1)-1): for j in range(len(S2)-1): data[i][j] = jaccard_similarity(S1[i:i+2], S2[j:j+2]) # 去重 data = np.triu(data) # 计算相似子串数量 count = np.count_nonzero(data) return ...
classSolution(object):defnumSimilarGroups(self, strs):""" :type strs: List[str] :rtype: int """N =len(strs) dsu = DSU(N)foriinrange(N):forjinrange(i +1, N):ifself.isSimilar(strs[i], strs[j]): dsu.union(i, j)returndsu.regions()defisSimilar(self, str1, str2): cou...
Python has two basic function for sorting lists:sortandsorted. Thesortsorts the list in place, while thesortedreturns a new sorted list from the items in iterable. Both functions have the same options:keyandreverse. Thekeytakes a function which will be used on each value in the list being ...
text = "Contact us at contact@catswhocode.com or support@catswhocode.com" emails = re.findall(r'\b[\w.-]+@[\w.-]+.\w+\b', text) Common regular expression functions: re.match(): Matches patterns at the start of strings re.search(): Finds patterns anywhere in strings re.findal...
In Python, lists allow us to store multiple items in a single variable. For example, if you need to store the ages of all the students in a class, you can do this task using a list. Lists are similar to arrays (dynamic arrays that allow us to store items of different data types) ...
In these examples, you create a list of integer numbers and then a tuple of similar objects. In both cases, the contained objects have the same data type. So, they’re homogeneous.The elements of a list or tuple can also be of heterogeneous data types:...
We can access the characters in a string in three ways. Indexing:One way is to treat strings as alistand use index values. For example, greet ='hello'# access 1st index elementprint(greet[1])# "e" Run Code Negative Indexing: Similar to a list, Python allows negative indexing for its...
Strings can also be sorted using thesorted()function, which returns a list of characters in alphabetical order. To convert the result back to a string, use''.join(). string_example ="hello" sorted_string =''.join(sorted(string_example))# returns "ehllo" ...
# You can find the length of a string len("This is a string") # => 16 我们可以在字符串前面加上f表示格式操作,并且在格式操作当中也支持运算。不过要注意,只有Python3.6以上的版本支持f操作。 # You can also format using f-strings or formatted string literals (in Python 3.6+) ...
Here, we used list comprehension to convert strings to integers. Learners find list comprehension challenging but let’s make it easy to understand. The [int(item) for item in string_list] is the list comprehension that creates a list of integers by looping over every element, an item in ...