Python also has many built-in functions that return a boolean value, like theisinstance()function, which can be used to determine if an object is of a certain data type: Example Check if an object is an integer or not: x =200
这里比如is_equal这一行,我们首先判断等号右边“first_num == second_num”,两个输入的数字是否相同,相同的话,is_equal这个变量就被赋值True,否则是False。其余两个变量也同理,那接下来,我们直接用这几个变量去替代if后面的条件判断,可以让代码更简洁易读: # Run the comparison if is_equal: print("They are...
def find_product_price(products, product_id): for id, price in products: if id == product_id: return price return None products = [ (143121312, 100), (432314553, 30), (32421912367, 150) ] print('The price of product 432314553 is {}'.format(find_product_price(products, 432314553)))...
port)post_data={'username':username,'password':password}respon=requests.post(url,data=post_data,verify=False)ifresponse.status_code==200:data=json.loads(response.text)returndata["token"]defget_scan_list()# 这里ip和port可以从配置文件中读取或者从数据库读取,这里我省略了获取这些配置值得操作...
True False 2、input()函数 输入函数 Python提供了一个input()函数,可以让用户输入字符串,并且存放在变量中,比如输入用户名 >>> name =input() jean 如何查看输入的内容: >>>name'jean' 或者使用: >>>print(name) jean 当然,有时候需要友好的提示一下,我们也可以这样做: ...
cmp argument takes a function that will take two objects as arguments and return a boolean representing whether the objects are differentdef my_cmp(obj1, obj2): return obj1.id != obj2.id watch(a, cmp=my_cmp) copy argument takes a function that will take a object and return a copy ...
即os.path.split(path)的第二个元素23os.path.exists(path) 如果path存在,返回True;如果path不存在,返回False24os.path.isabs(path) 如果path是绝对路径,返回True25os.path.isfile(path) 如果path是一个存在的文件,返回True。否则返回False26os.path.isdir(path) 如果path是一个存在的目录,则返回True。否则...
scalar or array-likeObject to check for null or missing values.Returns---bool or array-like of boolFor scalar input, returns a scalar boolean.For array input, returns an array of boolean indicating whether eachcorresponding element is missing.See Also---notna : Boolean inverse of pandas.isna....
Boolean evaluation¶ classMyBoolean(object):def__bool__(self):returnTrue# implement some logic heredef__nonzero__(self):# Python 2 compatibilityreturntype(self).__bool__(self) Division¶ classMyDivisible(object):def__truediv__(self,other):returnself/other# implement some logic heredef__...
Here the state is comprised of apromptandimage_url. There are also the booleansprocessingandcompleteto indicate when to disable the button (during image generation) and when to show the resulting image. Event Handlers defget_image(self):"""Get the image from the prompt."""ifself.prompt =...