一、交互式环境与print输出 1、print:打印/输出 2、coding:编码 3、syntax:语法 4、error:错误 5、invalid:无效 6、identifier:名称/标识符 7、character:字符 二、字符串的操作 1、user:用户 2、name:姓名/名称 3、attribute:字段/属性 4、value:值 5、key:键 三、重复/转换/替换/原始字符串 1、upper:...
You may have noticed that the multiline expressions we have been using with conditional frequency distributions look like list comprehensions, but without the brackets. In general, when we use a list comprehension as a parameter to a function, like set([w.lower for w in t]), we are permitt...
# This swaps the variables in one line(!). # It doesn't violate strong typing because values aren't # actually being assigned, but new objects are bound to # the old names. >>> myvar, mystring=mystring, myvar 数据类型 Python具有列表(list)、元组(tuple)和字典(dictionaries)三种基本的数据...
"""This is a multiline comment. The following lines concatenate the two strings.""" >>> mystring = "Hello" >>> mystring += " world." >>> print mystring Hello world. # This swaps the variables in one line(!). # It doesn't violate strong typing because values aren't # actually...
a multiline string.""" # WARNING: Watch out for the trailing s in "%(key)s". >>> print "This %(verb)s a %(noun)s." % {"noun": "test", "verb": "is"} This is a test. 流程控制 Python中可以使用if、for和while来实现流程控制。Python中并没有select,取而代之使用if来实现。使用...
Python>>>print "Name: %s\Number: %s\String: %s" % (myclass.name, 3, 3 * "-")Name: PoromenosNumber: 3String: --- strString = """This isa multilinestring.""" # WARNING: Watch out for the trailing s in "%(key)s".>>> print "This %(verb)s a %(noun)s." % {"noun":...
Multiline strings use triple quotes: """Triple double quotes""" '''\ Triple single quotes\ ''' In the last example above (triple single quotes), note how the backslashes are used to escape the newlines. This eliminates extra newlines, while keeping the text and quotes nicely left-justified...
jshell> for(int i=0;i<5;i++){ ...> /*Notice the multiline ...> comment and the ...> lack of indentation for several statements */ ...> System.out.println(i);i++;i--; ...> } 0 1 2 3 4 In Python, list comprehension using similar code looks like this: >>> srcList...
Convert a list to a string in Python 03:04 Unindent multiline strings in Python with dedent 03:09 Raw strings 01:52 Debugging with f-strings 02:45 Multiline strings 01:50 13 mins Context Managers A context manager as an object that can be used with Python'swithblocks. You can make yo...
Another improvement is that you can add line breaks inside the curly braces, similar to what you can do inside parentheses outside f-strings. You don’t even need to use the triple-quoted multiline strings to do this.Deciphering F-String Error Messages...