string="Hello, World!"last_three_chars=string[-3:]print(last_three_chars) 1. 2. 3. 运行结果为: ld! 1. 在上面的代码中,我们定义了一个字符串string,然后使用切片操作[-3:]获取了最后三个字符,并将结果赋值给last_three_chars变量。最后,我们使用print()函数输出变量last_three_chars的值。运行代码...
defget_last_three_characters(string):returnstring[-3:]# 测试示例string1="Hello"string2="Mermaid"string3="Python"last_three1=get_last_three_characters(string1)last_three2=get_last_three_characters(string2)last_three3=get_last_three_characters(string3)print(f"The last three characters of '{s...
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...
python的string模块 1.字符串属性方法操作: 1.>字符串格式输出对齐 1 2 3 4 5 6 7 8 9 10 11 >>> str = "Python stRING" >>> print str.center(20) #生成20个字符长度,str排中间 Python stRING >>> print str.ljust(20) #生成20个字符长度,str左对齐 Python stRING >>> print str.rjust...
Note that filter(function, iterable) is equivalent to [item for item in iterable if function(item)] str.isalpha() Return true if all characters in the string are alphabetic and there is at least one character, false otherwise. 本章小结 ...
One way to remember how slices work is to think of the indices as pointing between characters, with the left edge of the first character numbered 0. Then the right edge of the last character of a string of n characters has index n, for example:一种记住切片工作的方法是考虑索引在字符之间...
# Get the first three letters of the first name. # If the name is less than 3 characters, the # slice will return the entire first name. set1 = first[0:3] # Get the first three letters of the last name. # If the name is less than 3 characters, the ...
[2:])print('Item 1 to -1 is',shoplist[1:-1])print('Item start to end is',shoplist[:])# 从某一字符串中切片 #print('characters 1 to 3 is',name[1:3])print('characters 2 to end is',name[2:])print('characters 1 to -1 is',name[1:-1])print('characters start to end is...
if row < 10: extraSpace = ' ' else: extraSpace = '' # Create the string for this row on the board. boardRow = '' for column in range(60): boardRow += board[column][row] print('%s%s %s %s' % (extraSpace, row, boardRow, row)) # Print the numbers across the bottom of ...
If there are two arguments, they must be strings of equal length, and in the resulting dictionary, each character in x will be mapped to the character at the same position in y. If there is a third argument, it must be a string, whose characters will be mapped to None in the result...