它的原理就是从列表的第一个元素开始逐个比较,直到找到匹配的元素为止。 # 线性查找元素位置的函数deflinear_search(arr,target):foriinrange(len(arr)):ifarr[i]==target:returnireturn-1# 测试线性查找函数arr=[1,2,3,4,5]target=3print(linear_search(arr,target))# 输出:2 1. 2. 3. 4. 5. 6...
found =Trueelse:ifitem < a_list[midpoint]:# 时间都消耗在了这个语句上returnbinary_search(a_list[:midpoint-1], item)else:returnbinary_search(a_list[midpoint+1:], item)returnfound test_list = [0,1,2,8,13,17,19,32,42,]print(binary_search(test_list,3))print(binary_search(test_list...
list.pop([i])Remove the item at the given position in the list, and return it. If no index is specified, a.pop() removes and returns the last item in the list. (The square brackets around the i in the method signature denote that the parameter is optional, not that you should type...
Theindex()method returns the position at the first occurrence of the specified value. Syntax list.index(elmnt,start,end) Parameter Values ParameterDescription elmntRequired. Any type (string, number, list, etc.). The element to search for ...
How can I search from the end of the list? Theindex()method doesn’t support reverse searching. To find thelast occurrence, reverse the list manually or use a comprehension: my_list=[1,2,3,2,1]last_index=len(my_list)-1-my_list[::-1].index(2)print(last_index)# Output: 3 ...
查找list 模糊匹配 python 功能实现: 日志保存与读取SQLite3 等级筛选SQL 模糊查询fuzzywuzzy 时间范围筛选time 日志内容语法高亮PyQt5.Qsci 日志具体信息弹窗Dialog(表单内容双击事件)PyQt5 logging Handler类,此程序可作为模块引入 文章目录 1. SQLite3 数据库...
_ast binhex imaplib scrolledlist _asyncio bisect imghdr search _bisect browser imp...Enter any module name togetmore help.Or,type"modules spam"to searchformodules whose name or summary contain the string"spam".>>>help('print')Help on built-infunctionprintinmodule builtins:print(...)print(...
ncalls tottime percall cumtime percall filename:lineno(function)10.0000.0000.0640.064<string>:1(<module>)10.0640.0640.0640.064test1.py:2(addUpNumbers)10.0000.0000.0640.064{built-inmethod builtins.exec}10.0000.0000.0000.000{method'disable'of'_lsprof.Profiler'objects} ...
这里我们尝试用re.search()来匹配: >>> test = '''Router#show ip int b Interface IP-Address OK? Method Status Protocol GigabitEthernet1/1 192.168.121.181 YES NVRAM up up GigabitEthernet1/2 192.168.110.2 YES NVRAM up up GigabitEthernet2/1 10.254.254.1 YES NVRAM up up GigabitEthernet2/2 10....
To search a string in a list in Python, you can use theinoperator to check if the string is present in the list. For example: my_list=["apple","banana","cherry"]if"banana"inmy_list:print("Found!") Copy Alternatively, you can use theindex()method to find the index of the first...