if isEdit=='Y': userphone = input("请输入联系人电话:") addressBook[name]=userphone print("联系人修改成功") continue else: continue else: userphone=input("请输入联系人电话:") addressBook[name]=userphone print("联系人加入成功!") continue if item==3: if name in addressBook: del addressB...
dict_values = dict.values() 2、说明 以列表返回字典中的所有值 3、返回值 返回字典中的所有值 4、示例代码 user = dict(name='呵呵', address=('北京市', '深圳市', '武汉市', '长沙市'), age=18, sex='男', email='123@163.com') dict_values = user.values() for value in dict_values...
executemany(sql,values) except Exception, e: print e sql=”select * from address” cursor.execute(sql) data=cursor.fetchall() if data for x in data: print x[0],x[1] cursor.close() conn.close() 继续深造,请看这里:Python教程。 原文出处:http://roclinux.cn/?p=2338...
AI代码解释 # Some int values221+34-1234567890000000000-1234567890000000000# Some float values1.21.21.5+23.53/13.0-12345678900000000000.0-1.23456789e+19 当一个float值和一个int值,通过算术运算符组合在一起时,结果总是一个float值。 在大多数情况下,两个整数的组合形成另一个整数,但任何数字(int或float)除以...
>>>print dic.values() # 返回dic所有的值 >>>print dic.items() # 返回dic所有的元素(键值对) >>>dic.clear() # 清空dic,dict变为{} 另外有一个很常用的用法: >>>del dic['tom'] # 删除 dic 的‘tom’元素 del是Python中保留的关键字,用于删除对象。
Iteration over a dictionary that you edit at the same time is not supported. It runs eight times because that's the point at which the dictionary resizes to hold more keys (we have eight deletion entries, so a resize is needed). This is actually an implementation detail. How deleted ...
'list'>>>> type(d.itervalues())<type 'dictionary-valueiterator'>EDIT2：...
As an example, we’ll build a dictionary that maps from English to Spanish words, so the keys and the values are all strings. The functiondictcreates a new dictionary with no items. Becausedictis the name of a built-in function, you should avoid using it as a variable name. ...
It’s a trivial edit to have the function return multiple values (in one set) as opposed to a boolean. All we need to do is drop the call tobool: We can further reduce the last two lines of code in the above version of our function to one line by removing the unnecessary use of...
字典dict全称dictionary,以键值对key-value的形式存储。所谓键值,就是将key作为索引存储。用大括号表示。 图中的'qinlu'是key,18是value值。key是唯一的,value可以对应各种数据类型。key-value的原理不妨想象成查找字典,拼音是key,对应的文字是value(当然字典的拼音不唯一)。 字典和数组的差异在于,因为字典以key的形...