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标点字符的字符串。 string.ascii_uppercase:包含所有大写ASCII字母的...
Perform a string formatting operation. The string on which this method is called can contain literal text or replacement fields delimited by braces {}. Each replacement field contains either the numeric index of a positional argument, or the name of a keyword argument. Returns a copy of the st...
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 ...
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...
format(1234567.89) '1,234,567.89' 👇 >>> "{0:_.2f}".format(1234567.89) '1_234_567.89' In these examples, you’ve used a comma and an underscore as thousand separators for integer and floating-point values. Setting the grouping_option component to an underscore (_) may also be ...
将String 变量转换为 float、int 或 boolean # String to Float float_string="254.2511"print(type(float_string))string_to_float=float(float_string)print(type(string_to_float))# String to Integer int_string="254"print(type(int_string))string_to_int=int(int_string)print(type(string_to_int))...
Rounds number to p significant digits. (Default precision: 6) G Same as 'g'. Except switches to 'E' if the number is large. % Percentage. Multiples by 100 and puts % at the end. Example 2: Simple number formatting # integer arguments print("The number is:{:d}".format(123)) # ...
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...
We usestr()to get a string representation of an object. >>>'Hello, Number '+str(5)'Hello, Number 5' Python Unlike JavaScript, we cannot concatenate an integer to a string in Python, otherwise we’ll get a TypeError: can only concatenate str (not “int”) to str. ...
>>> 052 File "", line 1 SyntaxError: leading zeros in decimal integer literals are not permitted; use an 0o prefix for octal integers 您可以使用任何提到的整数文字以不同的方式表达相同的值: >>> >>> 42 == 0b101010 == 0x2a == 0o52 True ...