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): ... Self.name,self.age = name, age ... def __func__ (self): ... Return "This guy is {self.name}, was {self.age} old". Format (self=self) ... >>> s =person (' Jihite ', 4) >>> s . __func__ () ' This guy is Jihite, was 4 old 'Go back to the top by subscript>>> ' {0[0]} is {0[1]} years old! '. Format ([' Jihite ', 4]) ' Jihite is 4 years old! ' >>> ' {0} is {1} years old! '. Format (' Jihite ', 4) ' Jihite is 4 years old! 'is actually through the locationFormat qualifierThrou

the outside can be multiple, we get a list, which means that sys.argv can actually be seen as a list, so we can use [] to extract the elements. The first element is the program itself, followed by the externally given parameters.Below we illustrate its usage with a very simple test.py program running results.Import SysA=SYS.ARGV[0]Print (a)Save the test.py in the root directory of the C drive.In the program, locate the ' run ', click-to-enter "cmd" and return Enter the console command window (e

Get_sample () as Sample: Print ( "Sample:", sample) Execution results are[Python] In __enter__ () Sample:foo In __exit__ () 1. The __enter__ () method is executed2. The value returned by the __enter__ () method-This example is "Foo", assigned to the variable ' sample '3. Execute code block, print variable "sample" with the value "Foo"4. The __exit__ () method is called with the real power that it can handle exceptions. You may have noticed that the __exit__ method of t

:#coding =utf-8Import OSOs.system (' e:\\test_object\\all_test.py ')OrImport OSOs.chdir ("E:\\test_object")Os.system (' Python all_test.py ')----------------- All files under the directory can be obtained by Os.listdir () Through Os.path.getmtime (path) #返回在此path下最后一次修改的时间 Connecting directories and filenames via os.path.join (path, name) #coding =utf-8Import OS#定义文件目录Result_dir = ' E:\\test_object\\report 'Lists=os.listdir (Result_dir)#重新按时间对目录下的文件进行排列Lists.sort (Key=lambd

Assume is s a string of lower case characters.Write A program This prints the longest substring of in s which the letters occur in alphabetical order. For example, if s = ‘azcbobobegghakl‘ , then your program should printLongest substring in alphabetical order Is:begghIn the case of ties, print the first substring. For example, if s = ‘abcbcd‘ , then your program should printLongest substring in alphabetical order IS:ABC# Paste Your code into this boxCount = 1result = S[0]While S:Newcount = 1New