string.digits:包含数字0～9的字符串。 string.ascii_letters:包含所有ASCII字母(大写和小写)的字符串。 string.ascii_lowercase:包含所有小写ASCII字母的字符串。 string.printable:包含所有可打印的ASCII字符的字符串。 string.punctuation:包含所有ASCII
之前就是field_name,可以是索引数字,也可以是字典中的键(也就是parse(format_string )函数返回的field_name) (2)!之后跟一个字符,这里跟了s和r,分别是str和raw的缩写,结果很明显,r原样输出了字符串里的\n,s转义了\n(3):之后就是format_spec部分,这里是让0位置的参数居中显示,两边用*填充,更多format_spec...
Return the integer represented by the string s in the given base, which defaults to 10. The string s must consist of one or more digits, possibly preceded by a sign. If base is 0, it is chosen from the leading characters of s, 0 for octal, 0x or 0X for hexadecimal. If base is ...
To interpolate values into a string template using .format(), you can use positional arguments in the method call. You can then use integer indices to determine which replacement field to insert each value into:Python 👇 👇 👇 >>> print("{0} {1} cost ${2}".format(6, "bananas...
digits (2) disk (2) dockerfile (2) document (2) dos (2) dot (2) dp (2) driver (2) eval (2) execute (2) fabric (2) fft (2) fifo (2) fixed (2) flags (2) form (2) gc (2) gd (2) gevent (2) goto (2) gzip (2) handler (2) header (2) im (2) integer (2)...
Format String Syntax Replacement Fields Syntax 替代字段特点 standard format specifier 对齐(align) 符号(sign) \#号选项 千位分隔符(thousand separator) 最小域宽(field width) 精度(precision) 类型(type) 什么是str.format呢? str.format()就是字符串类型的一个函数,它用来执行字符串格式化操作。
十六,for 循环 or循环遍历字符串 for 变量 in 可迭代对象: 循环体 for c in s: # c: charactor(字符) s: string print(c) in有两种⽤法: 1. 在for中. 是把每⼀个元素获取到赋值给前⾯的变量. 2. 不在for中. 判断xxx是否出现在str中....
It determines the type of conversion that Python applies to the corresponding value before inserting it into the format string. Here’s a table that lists the possible conversion types:<type>Conversion Type d, i, u Decimal integer x, X Hexadecimal integer o Octal integer f, F Floating-point...
Example 2: Simple number formatting # integer argumentsprint("The number is:{:d}".format(123))# float argumentsprint("The float number is:{:f}".format(123.4567898))# octal, binary and hexadecimal formatprint("bin: {0:b}, oct: {0:o}, hex: {0:x}".format(12)) ...
import string string.ascii_letters#输出所有的大小写字母 string.digits #输出所有(0-9)的数字 string.ascii_letters #输出大小写的英文字母 string.ascii_lowercase #输出小写英文字母 string.ascii_uppercase #输出小写英文字母 10)格式化字符串 #format(修饰符及说明符同c语言) "{name}huh{age}".format(name...