fromfunctoolsimportwraps variables={}deftrack_variable(func):@wraps(func)defwrapper(*args,**kwargs):result=func(*args,**kwargs)variables[func.__code__.co_names[0]]=resultreturnresultreturnwrapper@track_variabledefadd(a,b):returna+b add(2,3)print(variables)# 输出:{'add': 5} 1. 2. ...
ExampleGet your own Python Server Legal variable names: myvar ="John" my_var ="John" _my_var ="John" myVar ="John" MYVAR ="John" myvar2 ="John" Try it Yourself » Example Illegal variable names: 2myvar ="John" my-var ="John" ...
Gets the name of var. Does it from the out most frame inner-wards. :param var: variable to get name from. :return: string """ for fi in reversed(inspect.stack()): names = [var_name for var_name, var_val in fi.frame.f_locals.items() if var_val is var] if len(names) > 0...
Example #get names of first and last variables in the file #last variable is index value N-1 because index values start at 0 firstVar=spss.GetVariableName(0) lastVar=spss.GetVariableName(spss.GetVariableCount()-1) print firstVar, lastVar #sort the data file in alphabetic order of variab...
Variable Names We can use differentvariable namesin python programming. This can be one letter like a, b, x etc., one more letter or a combination of letters, digits and underscore character (_). Avariable namecan start with a lower case, upper case or underscore character. But a python...
索引值代表作用中資料集中的位置,從檔案順序中第一個變數的 0 開始。 範例 #Create a list of variables that have a specified attribute import spss varList=[] attribute='demographicvars' for i in range(spss.GetVariableCount()): if (attribute in spss.GetVarAttributeNames(i)): varList.append(...
Getting variable names directly usingnameof Detecting next immediate attribute name fromvarnameimportwillclassAwesomeClass:def__init__(self):self.will=Nonedefpermit(self):self.will=will(raise_exc=False)ifself.will=='do':# let self handle doreturnselfraiseAttributeError('Should do something with Awes...
变量名全部小写,由下划线连接各个单词。如color = WHITE,this_is_a_variable = 1 *注意*: 1.不论是类成员变量还是全局变量,均不使用 m 或 g 前缀。 2.私有类成员使用单一下划线前缀标识,多定义公开成员,少定义私有成员。 3.变量名不应带有类型信息,因为Python是动态类型语言。如 iValue、names_list、dict_ob...
this_is_a_variable = 1 不论是类成员变量还是全局变量,均不使用 m 或 g 前缀。私有类成员使用单一下划线前缀标识,多定义公开成员,少定义私有成员。 变量名不应带有类型信息,因为 Python 是动态类型语言。如 iValue、names_list、dict_obj 等都是不好的命名。
>>> names = ['Elwood', 'Jake'] >>> a = [name.lower() for name in names] >>> a ['elwood', 'jake'] 语法是:[ <expression> for <variable_name> in <sequence> ] 过滤 可以对列表元素进行过滤,操作符合要求的元素 >>> a = [1, -5, 4, 2, -2, 10] >>> b = [2*x for ...