replacement_field ::= "{" [field_name] ["!" conversion] [":" format_spec] "}" field_name ::= arg_name ("." attribute_name | "[" element_index "]")* arg_name ::= [identifier | integer] attribute_name ::= identifier element_index ::= integer | index_string index_string ::...
Python print(f"On the Moon, you would weigh about{round(100/6,1)}% of your weight on Earth.") Output:On the Moon, you would weigh about 16.7% of your weight on Earth. Using an expression doesn't require a function call. Any of the string methods are valid as well. For example,...
Single quotes and double quotes can both be used to declare strings in Python. You can even use triple-double quotes! Learn when to use each in this lesson as well as variable substitution in strings. foo ='What is up'foo='What\'s up'foo="What's up"foo="""what's up man !"""...
b 2. in Python 2.6 on up you can use the new format() method on strings: >>>'{a}'.format(a = ‘spam’) 'spam’ 3. using string >>>import string >>>template = string.Template(“$scheme://$host:$port/$route#$fragment”) >>>template.substitute(scheme = ”http”, host = ”...
python中string的模板 string.format python 文章作者:Tyan 0. 测试环境 Python 3.6.9 1. 引言 Python中格式化字符串的方式有,一种是用%操作符来进行字符串格式化,一种是使用str.format()来进行字符串格式化,本文主要介绍str.format()方式,这种方式更主流,也是官方推荐的方式,%的方式后面会逐渐淘汰。
Python的format语法,可以用在两个场景:一个是{}.format中,另一个是f-string中,`f{xxx}'中,只不过后者支持外部定义的变量: # .format way 1 print('Hello {}!'.format('World')) # .format way 2 print('Hello {name}!'.format(name='World')) # f-string name = 'World' print(f'Hello {nam...
replacement_field::="{"[field_name]["!"conversion][":"format_spec]"}"field_name::=arg_name("."attribute_name|"["element_index"]")*arg_name::=[identifier|digit+]attribute_name::=identifierelement_index::=digit+|index_stringindex_string::=<any source character except"]">+conversion::...
Python 2.6 中引入了 str.format() 格式化方法:https://docs.python.org/3/library/stdtypes.html#str.format。 2.1 str.format() 的使用 str.format() 是对%格式化的改进,它使用普通函数调用语法,并且可以通过__format__()方法为对象进行扩展。
使用f-string,在Python3.6及以上版本中,引入了f-string的语法糖。它可以更加简洁地实现字符串格式化操作。例如:print(f"My name is {my_name}, and I am {age} years old.")输出结果与上述相同。需要注意的是,f-string的格式化功能与format()函数相同,因此可以使用相同的格式化语法。使用format_map(),...
string 拼接 可以使用+实现两个字符串的拼接。 a = "Hello" b = "World" c = a + b print(c) --- output --- PS E:\dream\markdown\python> & "C:/Program Files (x86)/Python/python.exe" e:/dream/markdown/python/app/app.py