x=5y=10ifx!=y:print("x is not equal to y")else:print("x is equal to y")# 输出 x is not equal to y 字符串版 x="10"y="10"ifx!=y:print("x is not equal to y")else:print("x is equal to y")# 输出 x is equal to y <>在过去的Py
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 ...
# 条件语句 x=10ifx>5:print("x is greater than 5")elif x==5:print("x is equal to 5")else:print("x is less than 5") 1. 2. 3. 4. 5. 6. 7. 8. 9. 关键点解析: if语句:基本的条件判断。 elif语句:多条件分支。 else语句:默认分支。 3. 循环结构 循环结构用于重复执行一段代码,...
price in products: # A if price not in unique_price_list: #B unique_price_list.append(price) return len(unique_price_list) products = [ (143121312, 100), (432314553, 30), (32421912367, 150), (937153201, 30) ] print('number of unique price is: {}'.format(find_unique_price...
print "Line 6 - a is neither less than nor equal to b" if ( b >= a ): print "Line 7 - b is either greater than or equal to b" else: print "Line 7 - b is neither greater than nor equal to b" 以上实例输出结果: Line 1 - a is not equal to b ...
4 Actually that'snottoo heavy.5He's got Blue eyes and Brown hair. 6 His teeth are usually White depending on the coffee. 7 If I add 35, 74, and 180 I get 289. 学习扩展 将所有变量中的my_都去掉。确保你在所有地方都修改了名称,不仅仅是在使用=设置它们的地方。
1people=202cats=303dogs=15456ifpeople<cats:7print("Too many cats! The world is doomed!")89ifpeople>cats:10print("Not many cats! The world is saved!")1112ifpeople<dogs:13print("The world is drooled on!")1415ifpeople>dogs:16print("The world is dry!")171819dogs+=52021ifpeople>=dogs...
ifarr is None orlen(arr)<=1:# 如果数组为空或只有一个元素,它已经是有序的 return _merge_sort_recursive(arr,0,len(arr)-1)# 调用递归核心函数 def_merge_sort_recursive(arr, low, high): """ 归并排序的递归核心实现。 参数: arr (list): 待排序的列表。
If you do it on separate lines, it doesn't "know" that there's already "wtf!" as an object (because "wtf!" is not implicitly interned as per the facts mentioned above). It's a compile-time optimization. This optimization doesn't apply to 3.7.x versions of CPython (check this ...
Python3.x中的35个保留字 andasassertasyncawaitbreakclasscontinuedefdelelifelseexceptFalsefinallyforfromglobalifimportinislambdaNonenonlocalnotorpassraisereturnTruetrywhilewithyield Python二级考试涉及到的保留字一共有22个。选学5个:None、finally、lambda、pass、with。