first_10_chars=my_string[:10] 1. 这行代码的意思是:从字符串my_string的开头(即索引0)开始,取到第10个字符(索引9)。 步骤3:打印结果 最后,我们可以使用print()函数来打印我们获取的前10个字符。 print("The first 10 characters are:",first_10_chars) 1. 饼状图 为了更直观地展示字符串切片的过程,...
运行Python解释器很便捷,在终端里输入python就进入了Python解释器。如果要输出文本“Hello world”,则使用print语句print("Hello world")。 将print("Hello world")保存为Python脚本文件hello_world.py。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 # hello_world.pyprint("Hello world") 运行该脚本的方法...
Python stRING >>> print str.ljust(20) #生成20个字符长度,str左对齐 Python stRING >>> print str.rjust(20) #生成20个字符长度,str右对齐 Python stRING 2.>大小写转换 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 >>> str = "Python stRING" >>> str.upper() #转大写 'PYTHON ...
print("---执行开始---") foriinrange(scale+1): a ='*'* i b ='.'* (scale - i) c = (i/scale)*100 print("{:^3.0f}%[{}->{}]".format(c,a,b)) time.sleep(0.1) print("---执行结束---") 运行结果 ---执行开始--- 0%[->...] 10%[*->...] 20%[**->...] 30...
Return True if the string is printable, False otherwise. A string is printable if all of its characters are considered printable in repr() or if it is empty. """ pass def isspace(self, *args, **kwargs): # real signature unknown ...
>>>string='hello'>>>type(string)<class'str'> 双引号: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 >>>string="hello">>>type(string)<class'str'> 三引号: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 >>>string='''hello'''>>>type(string)<class'str'>>>string="""hello...
make the first character have upper case and the rest lower case. """ pass def casefold(self, *args, **kwargs): # real signature unknown """ Return a version of the string suitable for caseless comparisons. """ pass def center(self, *args, **kwargs): # real signature unknown ""...
在编程中，any这个函数和map函数一起用起来很有帮助。map函数会逐个检查给定字符串中的每个字符，然后...
2 v =a.capitalize()3 print(v) # 输出 # Alex 源码: 1 def capitalize(self, *args, **kwargs): #real signature unknown 2 """ 3 Return a capitalized version of the string.4 5 More specifically, make the first character have upper case and the rest lower6 case.7 """ ...
# access characters in string # declare, assign string str = "Hello world" # print complete string print "str:", str # print first character print "str[0]:", str[0] # print second character print "str[1]:", str[1] # print last character print "str[-1]:", str[-1] # print...