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...
Return a copy of the string where all tab characters are replaced by one or more spaces, depending on the current column and the given tab size. The column number is reset to zero after each newline occurring in the string. If tabsize is not given, a tab size of 8 characters is assu...
character(字符): 字符串中的一个元素,包括字母、数字和符号。 index(索引): 用于选择序列中项的整数值,例如字符串中的字符。在 Python 中,索引从0开始。 slice(切片): 由一系列索引范围指定字符串的一部分。 emptystring(空字符串): 一个不包含任何字符且长度为0的字符串 ...
现在这里有一个类似repeat的函数,不同之处在于它有一个返回值。 defrepeat_string(word, n):returnword * n 请注意,我们可以在return语句中使用一个表达式,而不仅仅是一个变量。 使用这个版本,我们可以将结果赋值给一个变量。当函数运行时,它不会显示任何内容。 line = repeat_string('Spam, ',4) 但之后我...
String of length 1. Character used to quote fields. line_terminator : str, optional The newline character or character sequence to use in the output file. Defaults to `os.linesep`, which depends on the OS in which this method is called ('\\n' for linux, '\\r\\n' for Windows, i...
If you are in a hurry, below are some quick examples of how to replace a character in a string. # Quick examples of replacing character in string # Initialize the string string = "welcome to sparkbyexamples" # Example 1: Using string.replace() method ...
>>> symbols[-1] # Last character ? >>> symbols[-2] # Negative indices are from end of string ? >>> 在Python 语言中,字符串是只读的。 尝试通过将 symbols 字符串的第一个字符变为小写字母 ‘a’ 来验证这一点。 >>> symbols[0] = 'a' Traceback (most recent call last): File "<stdi...
'stRINg lEArn ' >>> >>> str.rjust(20) #str右对齐 ' stRINg lEArn' >>> >>> str.zfill(20) #str右对齐,左边填充0 '00000000stRINg lEArn' 大小写转换 >>> str='stRINg lEArn' >>> >>> str.upper() #转大写 'STRING LEARN' >>> ...
word[-1]#Thelastcharacter A word[-2]#Thelast-but-onecharacter p word[-2:]#Thelasttwocharacters pA word[:-2]#Allbutthelasttwocharacters Hel 不过-0还是0,所以它不是从右边计数的! word[-0]#(since-0equals0) H 越界的负切片索引会被截断,不过不要尝试在前元素索引(非切片的)中这样做: word...
1 'Take a string and remove all leading and trailing whitespace' 2 3 def newStrip(str): 4 'delete blanks around a string' 5 _end = len(str) 6 _start = 0 7 8 # delete the blanks at the beginning of the string 9 for i in range(_end): ...