a.iterkeys() return an iterator over the mapping's keys (2), (3) a.itervalues() return an iterator over the mapping's values (2), (3) 注意:items(), keys(), values()都返回一个list,即[] 如:dict.items()输出为 [('a', 'b'), (1, 2), ('hello', 'world')] 三、一些基本...
In this for loop, we print the pairs sorted in ascending order. Theiteritemsfunction returns an iterator over the dictionary's (key, value) pairs. for key in sorted(items.keys(), reverse=True): print("{0}: {1}".format(key, items[key])) In the second for loop, the data is sorte...
""" 项可迭代 """ """ D.iteritems() -> an iterator over the (key, value) items of D """ pass def iterkeys(self): # real signature unknown; restored from __doc__ """ key可迭代 """ """ D.iterkeys() -> an iterator over the keys of D """ pass def itervalues(self): #...
49 """ D.iteritems() -> an iterator over the (key, value) items of D """ 50 pass 51 52 def iterkeys(self): # real signature unknown; restored from __doc__ 53 """ key可迭代 """ 54 """ D.iterkeys() -> an iterator over the keys of D """ 55 pass 56 57 def itervalues...
For Python dictionaries, .__iter__() allows direct iteration over the keys by default. This means that if you use a dictionary directly in a for loop, Python will automatically call .__iter__() on that dictionary, and you’ll get an iterator that goes over its keys:...
""" D.iterkeys() -> an iterator over the keys of D """ pass (9)def itervalues(self): value可迭代 # real signature unknown; restored from __doc__ """ value可迭代 """ """ D.itervalues() -> an iterator over the values of D """ ...
iterator that iterates over the keys of the dictionary. [...] This means that we can write 1 forkindict: ... which is equivalent to, but much faster than 1 forkindict.keys(): ... as long as the restriction on modifications to the dictionary ...
ListIterationgeeksforgeeksTupleIterationgeeksforgeeksStringIterationGeeksDictionaryIterationxyz123abc345 可迭代 vs 迭代器(Iterable vs Iterator) Python中可迭代对象和迭代器不同。它们之间的主要区别是,Python中的可迭代对象不能保存迭代的状态,而在迭代器中,当前迭代的状态被保存。
The dictionary is: {'name': 'PythonForBeginners', 'acronym': 'PFB', 'about': 'Python Tutorials Website'} The values in the dictionary are: PythonForBeginners PFB Python Tutorials Website In the code above, we have simply obtained an iterator which iterates over the keys in the and then...
| __reversed__(...) | L.__reversed__() -- return a reverse iterator over the list...