python字典內建常用函式解析

def clear(self): # real signature unknown; restored fromdoc

「」" d.clear() -> none. remove all items from d. 「」"

pass

刪除字典d中的所有專案，會保留空字典d

def get(self, k, d=none): # real signature unknown; restored from __doc__

""" d.get(k[,d]) -> d[k] if k in d, else d.  d defaults to none. """
pass

尋找輸入的鍵名k，如果字典d裡有鍵名k，返回鍵名k的鍵值，如果沒有，返回預設值none，預設值可以自行定義。

def items(self): # real signature unknown; restored fromdoc

「」" d.items() -> a set-like object providing a view on d』s items 「」"

pass

通過一種類似集合的方式展示字典d中的所有專案

def keys(self): # real signature unknown; restored from __doc__

""" d.keys() -> a set-like object providing a view on d's keys """
pass

def pop(self, k, d=none): # real signature unknown; restored from __doc__

"""d.pop(k[,d]) -> v, remove specified key and return the corresponding value.
if key is not found, d is returned if given, otherwise keyerror is raised
"""pass

def popitem(self): # real signature unknown; restored fromdoc

「」"d.popitem() -> (k, v), remove and return some (key, value) pair as a

2-tuple; but raise keyerror if d is empty.

「」"pass

按照先進先出的原則丟擲鍵值對，丟擲錯誤的鍵值對以元組的方式表現。如果字典為空就會報keyerror。

def setdefault(self, k, d=none): # real signature unknown; restored from __doc__

""" d.setdefault(k[,d]) -> d.get(k,d), also set d[k]=d if k not in d """
pass

def update(self, e=none, **f): # known special case of dict.update

"""d.update([e, ]**f) -> none.  update d from dict/iterable e and f.
if e is present and has a .keys() method, then does:  for k in e: d[k] = e[k]
if e is present and lacks a .keys() method, then does:  for k, v in e: d[k] = v
in either case, this is followed by: for k in f:  d[k] = f[k]
"""pass

f同e

def values(self): # real signature unknown; restored from __doc__

""" d.values() -> an object providing a view on d's values """
pass

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