In addition, we canaccess just a specific characteror aslice of charactersof a string. We might want to do this, for example, if we have a text that’s too long to display and we want to show just a portion of it. Or if we want to make an acronym by taking the first letter of...
It’s an older string formatting method in Python. Because the technique still works and has been commonly used in Python 2, it’s helpful to understand the basics of this syntax. In this tutorial, you’ve learned how to: Use the modulo operator (%) for string formatting Convert values ...
"Euler's constant is roughly 2.718281828459045." String Formatting: The Long Version Replacement Field Names 在最简单的情况下,只需提供未命名的参数来格式化格式化字符串并使用未命名的字段。然后,字段和参数按照给出的顺序成对出现。还可以为参数提供名称,然后在替换字段中使用名称来请求这些特定的值。这两种策略...
54 55 """ 56 return (sep or ' ').join(x.capitalize() for x in s.split(sep)) 57 58 59 # Construct a translation string 60 _idmapL = None 61 def maketrans(fromstr, tostr): 62 """maketrans(frm, to) -> string 63 64 Return a translation table (a string of 256 bytes long) ...
In the example above, we gave the number5a character field size of 4, and the stringballoonsa character field size of 16 (because it is a long string). As we see, by default strings are left-justified within the field, and numbers are right-justified. You can modify this by placing ...
#!/usr/bin/env python # -*- coding:utf-8 -*- # @Time : 2022/7/16 18:26 # @Author: YY # @File : log.py import logging class Log: def __init__(self, level="DEBUG"): # 日志器对象 self.log = logging.getLogger() self.log.setLevel(level) def console_handle(self, level="...
http://stackoverflow.com/questions/5082452/python-string-formatting-vs-format Python f-string 是执行字符串格式化的最新Python 语法。自Python 3.6 起可用。 Python f 字符串提供了一种更快,更易读,更简明且不易出错的在Python 中格式化字符串的方式。f 字符串的前缀为f,并使用{}括号评估值。 在冒号后指定...
' stRINg lEArn' >>> >>> str.zfill(20) #str右对齐,左边填充0 '00000000stRINg lEArn' 大小写转换 >>> str='stRINg lEArn' >>> >>> str.upper() #转大写 'STRING LEARN' >>> >>> str.lower() #转小写 'string learn' >>> >>> str.capitalize() #字符串首为大写,其余小写 ...
Numbers(数字):Python3 中有四种数字类型 (没有 Python2 中的 Long),分别是 int 长整型、bool 布尔、float 浮点数、complex 复数(1 + 2j); String(字符串):Python 中字符串不能改变,并且没有单独的字符类型,一个字符就是长度为 1 的字符串; Tuple(元组):类似于 List,但不能二次赋值,相当于只读列表。
foo = this_is_a_function_with_formatting( var_a=1, var_b=2, var_c=3, var_d=4, with_long_arguments=[5,6,7,8,9], ) 相比未格式化的代码,可以看到格式化后的代码更加规范、可读性更好。 而Python 中就存在能实现这样风格的格式化工具。早期著名的格式化工具的有autopep8和 Google 的yapf,但它...