>>> f"{today:%B %d, %Y}"# using date format specifier 'January 27, 2017' >>> f"{today=:%B %d, %Y}"# using date format specifier and debugging 'today=January 27, 2017' >>> number=1024 >>> f"{number:#0x}"# using integerformatspecifier '0x400' >>> foo="bar" >>> f"{ ...
s4 = "xxxx {} XXX {name} xxx {}".format(value2,value1,name="s4") print(s4) # xxxx [9, 0] XXX s4 xxx (7, 8) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 7.3 f-string f-string是2015年python 3.6 根据PEP 498新添加的一种字符串格式化方法,f-string实际上是在运行时计算的表...
Note that you’ve used a string and an integer. Because you use the %s specifier, Python converts both objects to strings.You can also use dictionaries as the right-hand operand in your interpolation expressions. To do this, you need to create conversion specifiers that enclose key names in...
(1)s:string,字符串;(2)d:decimal integer,十进制数;(3)i:integer,用法同%d;(4)u:unsigned integer,无符号十进制数;(5)f:float,浮点数(默认保留小数点后6位);(6)F:Float,浮点数(默认保留小数点后6位);(7)e:exponent,将数字表示为科学计数法(小写e,默认保留小数点后6位);(8)E:Exponent,将数字表...
("." attribute_name | "[" element_index "]")* arg_name ::= [identifier | integer] attribute_name ::= identifier element_index ::= integer | index_string index_string ::= <any source character except "]"> + conversion ::= "r" | "s" | "a" format_spec ::= <described in ...
When working with different data types, f-strings handle each type elegantly. Let's see how f-strings work with various Python data types: # Working with numeric types integer_value = 42 float_value = 23.5 print(f"Integer: {integer_value}") print(f"Float: {float_value}") Powered By ...
print(f'{val:_}') print(f'{val:,}') A big integer is printed in formats where thousand groups are separated with_and,. $ python main.py 1200400001 1_200_400_001 1,200,400,001 Percentage We display a decimal value as percentage using the%format specifier. ...
execute(''' CREATE TABLE users ( login VARCHAR(8), uid INTEGER, prid INTEGER) ''')Unicode 字符串Python 中定义一个 Unicode 字符串和定义一个普通字符串一样简单:>>> u'Hello World !' u'Hello World !'引号前小写的"u"表示这里创建的是一个 Unicode 字符串。如果你想加入一个特殊字符,可以使用 ...
(1) s: string, 字符串; (2) d: decimal integer, 十进制数; (3) i: integer, 用法同%d; (4) u: unsigned integer, 无符号十进制数; (5) f: float, 浮点数(默认保留小数点后6位); (6) F: Float, 浮点数(默认保留小数点后6位); ...
decimal.Decimal("12.34567")>>>f"result:{value:{width}.{precision}}"# nested fields'result: 12.35'>>>today = datetime(year=2017, month=1, day=27)>>>f"{today:%B %d, %Y}"# using date format specifier'January 27, 2017'>>>number =1024>>>f"{number:#0x}"# using integer format ...