firstName ='Bob'lastName='Dylan'print('你的名字是%s, 你的姓是%s'% (firstName, lastName)) 对于string, list等类型的变量,一律可用%s代替。 对于int类型,用%d 对于float类型,用%f 如果需要对float类型的变量进行小数点后位数的控制,则使用%.<number of digits>f。如 pai = 3.14159print('%.2f'%pai...
print("This number in scientific notation: %e" % 1234567) print("My chances are %%%d" % 100) # 'My chances are %100' 1. 2. 3. 4. 5. 6. 注意:%的方式虽然可以实现字符串格式化,但在 Python 3.6 以后,官方更推荐使用 f-string(格式化字符串)的方式,例如: name = "Alice" age = 25 pri...
Strings can beconcatenatedto build longer strings using the plus sign and also they can bemultipliedby a number, which results in the continuous repetition of the string as many times as the number indicates. Also, if we want to find out thelengthof the string, we simply have to use thelen...
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...
f-string在功能方面不逊于传统的%-formatting语句和str.format()函数,同时性能又优于二者,且使用起来也更加简洁明了,因此对于Python3.6及以后的版本,推荐使用f-string进行字符串格式化。 用法 此部分内容主要参考以下资料: Python Documentation – Formatted String Literals ...
chars = string.ascii_letters + string.digits s = [random.choice(chars) for i in range(length)] f.write('{0}\n'.format(''.join(s))) f.close() if __name__ == '__main__': rand_str(200) 1 2 3 4 5 6 7 8 9 10 ...
Concatenate any number of strings. The string whose method is called is inserted in between each given string. The result is returned as a new string. Example: '.'.join(['ab', 'pq', 'rs']) -> 'ab.pq.rs' 连接任意数量的字符串。
Here, Argument 0 is a string "Adam" and Argument 1 is a floating number 230.2346. Note: Argument list starts from 0 in Python. The string "Hello {0}, your balance is {1:9.3f}" is the template string. This contains the format codes for formatting. The curly braces are just placeholde...
八、string模块常用字符串常量 结束 《Python语言程序设计基础》: 在Python解析器内部,所有数据类型都采用面向对象方式实现,封装成一个类。 字符串也是一个类,它具有类似.()形式的字符串处理函数。 在面向对象中,这类函数被称为“方法”。 无特别说明,str是将要进行处理的目标字符串。全部方法操作后返回副本,不赋值...
负号指时数字应该是左对齐的,“0”告诉python用前导0填充数字,正号指时数字总是显示它的正负(+,-)符号,即使数字是正数也不例外。 可指定最小的字段宽度,如:"%5d" % 2。也可用句点符指定附加的精度,如:"%.3d" % 3。 e.g. 例:数字格式化