Python list, tuple, dict, set comparison

	List	Tuple	Dict	Set
Characteristics	Order, find speed gradually as the element increases	Ordered \ cannot be modified	Unordered, Find Fast, key cannot be duplicated	Elements are not duplicated, unordered, and determine whether an element is fast in set
Create	L =[' Michael ', ' Bob ', ' Tracy '	t = (' Adam ', ' Lisa ', ' Bart ') t = (1,) t = (' A ', ' B ', [' A ', ' B '])	D = { ' Adam ': 95, ' Lisa ': 85, ' Bart ': 59 }	s = set ([' A ', ' B ', ' C '])
Access	L[0], l[-1]	T[0], t[-1]	Access via key If ' Paul ' in D: Print d[' Paul ' Or D.get (' Paul ')	x = '??? ' # user-entered string If x in weekdays: print ' Input ok ' Else print ' input error '
adding elements	Tail add l.append (' Paul ') Inserts the specified index position l.insert (0, ' Paul ')	No	d[' Paul '] = 72	S.add (4)
Delete Element	Delete last element and return L.pop () Deletes an element of the specified index L.pop (2)	No		S.remove (4)
Replace element	L[2] = ' Paul ' L[-1] = ' Paul '	No
The empty		t = ()
Number of elements			Len (d)
Traverse			For key in D: ... print Key	For name in S: ... print Name
Slice	Take the first 3 elements L[0:3] starting at index 0, until index 3, but not including index 3; If the first index is 0, you can omit to write l[:3]; The third parameter indicates that each n takes one, on L[::2]
Iteration	L = [' Adam ', ' Lisa ', ' Bart ', ' Paul '] >>> for index, name in enumerate (L): ... print index, '-', name		D = {' Adam ': +, ' Lisa ': $, ' Bart ': 59} Print d.values () # [85, 95, 59] For V in D.values (): Print V # 85 # 95 # 59 Or D = {' Adam ': +, ' Lisa ': $, ' Bart ': 59} Print d.itervalues () # <dictionary-valueiterator Object at 0x106adbb50> For V in D.itervalues (): Print V # 85 # 95 # 59 Or for key, value in D.items (): ... print key, ': ', value ... Lisa:85 Adam:95 bart:59

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Python list, tuple, dict, set comparison