其他语言可能没有直接测试子字符串的方法,因此您必须使用这些类型的方法,但是对于Python,使用incomparison运算符效率更高。 性能比较 我们可以比较实现同一目标的各种方式。 AI检测代码解析 import timeit def in_(s, other): return other in s def contains(s, other): return s.__contains__(other) def find...
下边内容是关于python判断字符串(string)是否包含(contains)子字符串的方法的内容。 方法2:使用find函数实现contains的功能 s = "This be a string" if s.find("is") == -1: print "No 'is' here!" else: print "Found 'is' in the string."...
特别是最后一行,冒号后面没有其它字符了,但是*表示可以匹配0次, 所以表达式也是成立的。 python代码如下: AI检测代码解析 import re content = ''' 我最喜欢的颜色:蓝色 她最喜欢的颜色:粉色 小红最喜欢的颜色:红色 : ''' p = re.compile(r':.*') for one in p.findall(content): print(one) 运行结...
print('First Input String Contains Second String? ', input_str1.__contains__(input_str2)) Output: Please enter first input string JournalDev is Nice Please enter second input string Dev First Input String Contains Second String? True You can checkout more Python string examples from ourGitHub...
4. Python String __contains__ __contains__() is an instance method which return true, if the substring exists, otherwise false is returned. 4.1 Syntax – String __contains__() The following is the syntax of the String __contains__() method ...
Python has built-in string function for finding substring in the given string using String._contains_() function. Syntax: str._contains_(substring) So this function _contains_() takes two strings. In the above syntax, we can see “str” is a string object which has one string and “subs...
Get Your Code:Click here to download the free sample codethat you’ll use to check if a string contains a substring. Take the Quiz:Test your knowledge with our interactive “How to Check if a Python String Contains a Substring” quiz. You’ll receive a score upon completion to help you...
If you are looking to find or replace items in a string, Python has several built-in methods that can help you search a target string for a specified substring. .find() Method Syntax string.find(substring, start, end) Powered By Note: start and end are optional arguments. From the ...
Checking whether a string contains a substring aids to generalize conditionals and create more flexible code. Additionally, depending on your domain model - che...
Python offers many ways to check if a string contains a substring. The simplest and fastest way to check whether a string contains a substring or not in Python is using the in operator, which is used as a comparison operator.