78#但是关键字参数必须位于位置参数之后9print('这是一个关于{0}、{1}和{girl}的故事。'.format('小明', girl='阿香','阿飞'))10###11File"E:/python文件夹/jiujiu.py", line 112print('这是一个关于{0}、{1}和{girl}的故事。'.format('小明', girl='阿香','阿飞'))13SyntaxError: positional...
ValueError: Precision not allowed in integer format specifier print('{0:.3}'.format(1.0/3)) 如果除法运算符的两个输入都是整数,则返回的结果也将是 int,小数部分被截断。 输出 float data = 1 print('{0:.3}'.format(float(data) / 3))...
print("Without specified width:", no_width) # formatting number with a width of 10, right-alignedright_aligned = format(123,'>10d') print("Right-aligned with width 10:", right_aligned) # formatting number with a width of 10, left-alignedleft_aligned = format(123,'<10d') print("Left...
17) Out[54]: '10001' In [55]: '{:d}'.format(17) Out[55]: '17' In [56]: '{:o}'.format(17) Out[56]: '21' In [57]: '{:x}'.format(17) Out[57]: '11' 设置二进制输出位宽32位输出,前面不足的补0。 print('{:032b}'.formati)) # bin(i) 用,号还能用来做金额...
print("你是:%s, %d岁" % ("CSDN", 22) # % 操作符也可以实现字符串格式化 # 推荐使用str.format(),{}里可以添加可选项:和格式标识符,这样可以对值进行更好的格式化 1. 2. 3. 4. 5. 6. %或者{}都可以看做转换说明符,转换说明符(Conversion Specifier)只是一个占位符,它会被后面表达式(变量、常...
str.format() 方法通过字符串中的花括号 {} 来识别替换字段 replacement field,从而完成字符串的格式化。替换字段 由字段名 field name 和转换字段 conversion field 以及格式说明符 format specifier 组成,即一般形式为 {字段名!转换字段:格式说明符}。字段名分为简单字段名 simple field name 和复合字段名 compound...
Once expressions in a format specifier are evaluated (if necessary), format specifiers are not interpreted by the f-string evaluator. Just as instr.format(), they are merely passed in to the__format__()method of the object being formatted. ...
a Unicode object.If format requires a single argument, values may be a single non-tuple object. [4] Otherwise, values must be a tuple with exactly the number of items specified by the format string, or a single mapping object (for example, a dictionary).A conversion specifier ...
Note that the format specifiers in these examples are the same ones that you used in the section on .format(). In this case, the embedded expression comes before the format specifier, which always starts with a colon. This syntax makes the string literals readable and concise....
>>> print('1 precision 3 is {:.3}'.format(1)) Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: Precision not allowed in integer format specifier >>> print('1.1 precision 3 is {:.3}'.format(1.1)) 1.1 precision 3 is 1.1 >>> print('1.123456...