方法二:使用type()函数 另一种方法是使用type()函数来检查输入参数的类型是否为list。 defcheck_array(input_param):iftype(input_param)==list:returnTrueelse:returnFalse# 测试input_param1=[1,2,3]input_param2="hello"print(check_array(input_param1))# Trueprint(check_array(input_param2))# False ...
Given a variable, we have to check if a variable is either a Python list, NumPy array, or pandas series.Check whether a given is variable is a Python list, a NumPy array or a Pandas SeriesFor this purpose, you can simply use the type() method by providing the varia...
1#使用__metaclass__(元类)的高级python用法2classSingleton2(type):3def__init__(cls,name,bases,dict):4super(Singleton2,cls).__init__(name,bases,dict)5cls._instance=None6def__call__(cls,*args,**kw):7ifcls._instance is None:8cls._instance=super(Singleton2,cls).__call__(*args,**...
If python function default input is mutable, calling the function will change on top of. defmutable_parameter(lst=[]):iflstisNone:lst=[]lst.append(1)returnlstprint(mutable_parameter())print(mutable_parameter())[1][1]use'lst=None'instead! Modifying while iterating First make sure modifying ...
``` # Python script to check the status of a website import requests def check_website_status(url): response = requests.get(url) if response.status_code == 200: # Your code here to handle a successful response else: # Your code here to handle an unsuccessful response ``` 说明: 此...
if TYPE_CHECKING: #reveal_type is not a runtime Python function, # but a debugging facility provided by Mypy. # That’s why there is no import for it reveal_type(authors) authors = 'Bob' book['weight'] = 4.2 del book['title'] if __name__ == '__main__': demo() …/typedic...
get/set_bytea_escaped – whether bytea data is returned escaped Y - get/set_jsondecode – decoding JSON format Y - get/set_cast_hook – fallback typecast function Y - get/set_datestyle – assume a fixed date style Y - get/set_typecast – custom typecasting Y - cast_array/record –...
1、 ifname== ‘main’: 没有此句将会执行两次打印输出语句,原模块执行一次,调用后执行一次。 等边三角 importturtleast#导入turtle模块,取别名为 t t.pencolor("black")#画笔颜色 t.fillcolor("pink")#填充颜色 t.begin_fill()#填充开始 t.forward(200)#长度200像素 ...
if hyundai.index.is_unique: print("NO") else: print("Yes") Yes 8)-将index设置为升序 In [97] hyundai.sort_index(inplace=True) hyundai.head(10) model year price transmission mileage fuelType tax mpg \ record 2016-03-05 Tucson 2016 14499 Automatic 25233 Diesel 235 43.5 2016-06-18 Tu...
def load_inference_model(args): use_gpu =False # 设置AnalysisConfig config = AnalysisConfig(os.path.join(args.weights, "model"), os.path.join(args.weights,"params")) if use_gpu: print("use gpu infer") config.enable_use_gpu(memory_pool_init_size_mb=3000) else: print("use cpu infer...