方法/步骤 1 导入string库文件,输入命令:gedit /usr/lib/python2.7/string.py,如图所示:第537--656行,主要包含:format,vformat,_vformat等函数.调用关系format->vformat->_vformat,我们从底层一步步分析代码如何实现.2 首先看函数_vformat(self, format_string, args, kwargs, used_args, recursion_depth):...
Besides transforming text and performing basic operations, such as matching and searching, it's essential to format the text when you're presenting information. The simplest way to present text information with Python is to use the print() function. You'll find it critical to get information ...
return 'Test str function.' def __repr__(self): return 'Test repr function.' def __ascii__(self): return 'Test ascii function.' print('str: {t!s}, repr: {t!r}, ascii: {t!a}'.format(t=Test())) # Ouput str: Test str function., repr: Test repr function., ascii: Test ...
This is the oldest option. It uses the%operator and classic string format specifies such as%sand%d. print('{} is {} years old'.format(name, age)) Since Python 3.0, theformatfunction was introduced to provide advance formatting options. print(f'{name} is {age} years old') Python f-s...
python3.6引入了一种新的字符串格式化方式:f-string格式化字符串。从%s格式化到format格式化再到f-string格式化,格式化的方式越来越直观,f-string的效率也较前两个高一些,使用起来也比前两个简单一些。同时值得注意的是,f-string就是在format格式化的基础之上做了一些变动,核心使用思想和format一样。
print("int: {0:d}; hex: {0:#x}; oct: {0:#o}; bin: {0:#b}".format(42)) points = 19 total = 22 print('Correct answers: {:.2%}.'.format(points/total)) for align, text in zip('<^>', ['left', 'center', 'right']): ...
In modern Python, you have f-strings and the .format() method to approach the tasks of interpolating and formatting strings.In this tutorial, you’ll learn how to:Use f-strings and the .format() method for string interpolation Format the interpolated values using replacement fields Create ...
Python String Formatting: Available Tools and Their Features You can take this quiz to test your understanding of the available tools for string formatting in Python, as well as their strengths and weaknesses. These tools include f-strings, the .format() method, and the modulo operator. ...
本篇主要针对字符串的输出格式,python2.6 新增了一种格式化字符串的函数 str.format(),它增强了字符串格式化的功能。 基本语法是通过 {} 和 : 来代替以前的 % 。 二、字符串输出 2.1 宏代换符号{} 注意,所有的string类型的宏代换部分,基本用法是{}代换。
string format 有两种方式: 方式一 (str.format()) :print('{}'.format(var)) 1.{}是占位符 ( placeholder ),对应的值在format()的括号内。 例如: print('Hi,{}!'.format('Mary')) 显示结果为: Hi, Mary! 2.format()中可以填入变量,这种方式更常见。例如: ...