例2，源字符串为：', string, ' 待查找字符串为：', sub_string)print('子字符串是否包含：', find_substring_regex(string, sub_string))在这个函数中，我们使用了re模块来编译一个正则表达式，然后使用search方法查找sub在s中的位置。如果sub出现了，返回True；否则返回False。执行结果为：总结 通过以上三种方...
substring = 'z' result = any(substring.lower() in word.lower() for word in my_list) print(result) # 👉️ False if any(substring.lower() in word.lower() for word in my_list): # 👇️ this runs print('The substring is contained in at least one of the list items') else:...
for row in infile: # 数据使用 tab 分割 data = [int(x.strip()) for x in row.split('\t') if x.strip() != ''] # 计算行和 rows_sum.append(sum(data)) # 累积列和 if len(cols_sum): for i, x in enumerate(data): cols_sum[i] += x else: cols_sum = data 1. 2. 3. ...
substring=string[:3] print(substring) # Print"All", 停止索引不包含index(3)位置的字符 Udemy 2022 年完整 Python 开发课程:从零到精通 https://www.koudaizy.com/tutorials/complete-python-developer-zero-to-mastery/ 获取字符串的中间部分 同时设置起始索引和停止索引,你可以获得字符串的中间部分。例子: ...
In another way, a substring can be defined as a part or subset of a string. Any modification in text data of a string is a part of the substring process. For example:“This is great work. We must pursue it.” is a type of string, and part of the string “We must pursue it” ...
foriinCOLOR.__members__: print(i) # output:YELLOW\nGREEN\nBLACK\nRED #枚举转换 #最好在数据库存取使用枚举的数值而不是使用标签名字字符串 #在代码里面使用枚举类 a=1 print(COLOR(a))# output:COLOR.YELLOW py2/3 转换工具 six模块:兼容pyton2和p...
match=re.search('first',txt,re.I)print(match)#<re.Match object;span=(100,105),match='first'># 获取匹配开始和结束位置元组 span=match.span()print(span)#(100,105)# 获取开始和结束值,并获截取字字符串 start,end=spanprint(start,end)#100105substring=txt[start:end]print(substring)# first ...
Like S.find() but raise ValueError when the substring is not found. >>>str1="abcdefg">>>str1.index("a")0>>>str1.index("f")5 find S.find(sub[, start[, end]]) -> int #在字符串里查找指定的子串,未找到时返回-1,找到则返回子串在字符串中的索引值 ...
而S.find()在找不到substring时,不会报错,而会返回-1 list 和 tuples获取索引: list.index(),tuple.index() ist和tuple有一个索引方法来获取元素的位置 : alist = [10, 16, 26, 5, 2, 19, 105, 26] #返回元素为16的索引值 print(alist.index(16)) # 注意,这里是通过元素查找索引 print(alist...
importre# The stringstring='Hello World, this is a string'# The substring we are looking forsubstring='this'print(re.search(substring,string)# print:<re.Match object; span=(13, 17), match='this'># span中的13和17分别代表着子字符串出现的起始位置和结束位置。 从上面的示例中我们可以看到,...