In addition, we canaccess just a specific characteror aslice of charactersof a string. We might want to do this, for example, if we have a text that’s too long to display and we want to show just a portion of it. Or if we want to make an acronym by taking the first letter of...
string.join(iterable),表示把每个元素都按照指定的格式连接起来。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 l=[]forninrange(0,100000):l.append(str(n))l=' '.join(l) 由于列表的append操作是O(1)复杂度,字符串同理。因此,这个含有for循环例子的时间复杂度为n*O(1)=O(n)。 接下来,我们...
string模块的历史可以追溯到Python最早的版本,以前在此模块中实现的许多函数已迁移至str对象方法。 目的:包含用于处理文本的常量和类。 函数(Functions) 函数capwords()用于分割一个句子的所有单词,然后将每个单词的首字母大写。 # string.capwords()例子importstringexample_str='you are the apple of my eye!'result...
54 55 """ 56 return (sep or ' ').join(x.capitalize() for x in s.split(sep)) 57 58 59 # Construct a translation string 60 _idmapL = None 61 def maketrans(fromstr, tostr): 62 """maketrans(frm, to) -> string 63 64 Return a translation table (a string of 256 bytes long) ...
以上的问题,也可以使用.strings,然后迭代判断,但是语法没有.text简单 strings = movie.find('p', class_='pTxt pIntroShow').strings for string in strings: if string != '展开全部': intro = string break 此文参考:Edit BeautifulSoup的教程很多,兴趣的可以参考 ...
print"join","=>", string.join(string.split(text),"+")#字符串连接 print"replace","=>", string.replace(text,"Python","Java")#字符串替换 print"find","=>", string.find(text,"Python"), string.find(text,"Java")#字符串查找 print"count","=>", string.count(text,"n")#字符串计数 ...
seek(0) #没有指定whence默认是0从文件首部偏移0 In [73]: f1.tell() Out[73]: 0 代码语言:javascript 代码运行次数:0 运行 AI代码解释 In [29]: help(file.read) Help on method_descriptor: read(...) read([size]) -> read at most size bytes, returned as a string. If the size ...
To check if a certain phrase or character is present in a string, we can use the keywords in or not in.ExampleGet your own Python Server Check if the phrase "ain" is present in the following text: txt = "The rain in Spain stays mainly in the plain"x = "ain" in txt print(x) ...
insert(index, string) 1. index若是END或者是INSERT,表示将字符串插入文件末端位置 例子: import tkinter root = () text = tkinter.Text(root, height=2, width=15) text.pack() text.insert(tkinter.END, 'Python\n') text.insert(tkinter.INSERT, 'Tkinter') ...
text ="Temperatures on the Moon can vary wildly."print("temperatures"intext.lower()) 輸出:True 您可能不需要每次都執行不區分大小寫的驗證,但當文字混合使用大小寫時,將所有字母轉換成小寫會是個好方法。 分割文字並執行轉換之後,您可能需要將所有段落重新組合在一起。 就像.split()方法可以分割字元一樣,...