In [41]: len(a) Out[41]: 5 In [42]: a+'f' Out[42]: 'abcdef' In [43]: a Out[43]: 'abcde' In [44]: print a abcde In [45]: a * 10 Out[45]: 'abcdeabcdeabcdeabcdeabcdeabcdeabcdeabcdeabcdeabcde' In [46]: '#'*50 Out[46]: '##################################################' In [47]: a + 1 --------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-47-a1bd27f4633f> in <module>() ----> 1 a + 1 TypeError: cannot concatenate 'str' and 'int' objects In [48]: ‘#’ * ‘a' File "<ipython-input-48-697a37d8b47d>", line 1 ‘#’ * ‘a' ^ SyntaxError: invalid syntax In [49]: 'a' in a Out[49]: True In [50]: a Out[50]: 'abcde' In [51]: 'f' in a Out[51]: False In [52]: 'f' not in a Out[52]: True In [53]: 'f' not in a +'f' Out[53]: False In [54]: max(a) Out[54]: 'e' In [55]: min(a) Out[55]: 'a' In [56]: cmp(a,'abcde') Out[56]: 0 In [57]: cmp(a,'abcdef') Out[57]: -1 In [58]: cmp(a+'g','abcde') Out[58]: 1 In [59]: help(cmp) Help on built-in function cmp in module __builtin__: cmp(...) cmp(x, y) -> integer Return negative if x<y, zero if x==y, positive if x>y. (END)...skipping... Help on built-in function cmp in module __builtin__: cmp(...) cmp(x, y) -> integer Return negative if x<y, zero if x==y, positive if x>y.
元组和列表相似
元组和字符串一样是不可变的
元组可以存储一系列的值
元组常在用户定义的函数能够安全的采用一组值的时候，即被使用的元组的值不会改变。
In [60]: t=('a',1,(1,))
In [61]: t
Out[61]: ('a', 1, (1,))
In [62]: t1=(1)
In [63]: type(t1)
Out[63]: int
In [64]: t1=(1,)
In [65]: type(t1)
Out[65]: tuple
In [66]: a
Out[66]: 'abcde'
In [67]: t =(a,'b','c')
In [68]: t
Out[68]: ('abcde', 'b', 'c')
In [69]: first,second,third=t
In [70]: first
Out[70]: 'abcde'
In [71]: second
Out[71]: 'b'
In [72]: third
Out[72]: 'c'
In [73]: t.
File "<ipython-input-73-a9f65571ee48>", line 1
t.
^
SyntaxError: invalid syntax
In [74]: t.count
Out[74]: <function count>
In [75]: t.
File "<ipython-input-75-a9f65571ee48>", line 1
t.
^
SyntaxError: invalid syntax
In [76]: help(t.count)
---------------------------------------------------------------------------
KeyboardInterrupt Traceback (most recent call last)
<ipython-input-76-aca5cb18b0a7> in <module>()
----> 1 help(t.count)
In [78]: t.count('b')
Out[78]: 1
In [79]: t.count('z'
...: )
Out[79]: 0
In [80]: t
Out[80]: ('abcde', 'b', 'c')
In [81]: t.count(a)
Out[81]: 1
In [82]: t.count('a')
Out[82]: 0
In [84]: t.index('b')
Out[84]: 1
In [85]: t.index('c')
Out[85]: 2
In [86]:
列表：
In [86]: list3 =['a',1,(1,),['hello','python']]
In [87]: list3
Out[87]: ['a', 1, (1,), ['hello', 'python']]
In [88]: len(list3)
Out[88]: 4
In [89]: list3[0]
Out[89]: 'a'
In [90]: list3[0]='b'
In [91]: list3
Out[91]: ['b', 1, (1,), ['hello', 'python']]
In [92]: list2=[]
In [93]: list2.append('linux')
In [94]: list2
Out[94]: ['linux']
In [95]: list3+list2
Out[95]: ['b', 1, (1,), ['hello', 'python'], 'linux']
In [96]: (list3+list2)*2
Out[96]:
['b',
1,
(1,),
['hello', 'python'],
'linux',
'b',
1,
(1,),
['hello', 'python'],
'linux']
In [97]: list3
Out[97]: ['b', 1, (1,), ['hello', 'python']]
In [98]: dev list3[-1]
File "<ipython-input-98-a37927fbd6ca>", line 1
dev list3[-1]
^
SyntaxError: invalid syntax
In [99]: del list3[-1]
In [100]: list3
Out[100]: ['b', 1, (1,)]
In [101]: list2
Out[101]: ['linux']
In [102]: del list2
In [103]: list2
---------------------------------------------------------------------------
NameError Traceback (most recent call last)
<ipython-input-103-db9b7629a516> in <module>()
----> 1 list2
NameError: name 'list2' is not defined
In [104]: help list.remove
File "<ipython-input-104-178e53c9bdee>", line 1
help list.remove
^
SyntaxError: invalid syntax
In [105]: help list3.remove
File "<ipython-input-105-b98070bef357>", line 1
help list3.remove
^
SyntaxError: invalid syntax
In [106]: helplist3.remove
---------------------------------------------------------------------------
NameError Traceback (most recent call last)
<ipython-input-106-e9ee3419c47a> in <module>()
----> 1 helplist3.remove
NameError: name 'helplist3' is not defined
In [107]: list3
Out[107]: ['b', 1, (1,)]
In [108]: list3.append(1)
In [109]: list3
Out[109]: ['b', 1, (1,), 1]
In [110]: list3.remove(1)
In [111]: list3
Out[111]: ['b', (1,), 1]
In [112]: list3.remove(2)
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-112-700afa01bf12> in <module>()
----> 1 list3.remove(2)
ValueError: list.remove(x): x not in list
In [113]: list3.index
Out[113]: <function index>
In [114]: list3.index(0)
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-114-05fab3a45675> in <module>()
----> 1 list3.index(0)
ValueError: 0 is not in list
In [115]: help list(3)
File "<ipython-input-115-81a30b2a31f7>", line 1
help list(3)
^
SyntaxError: invalid syntax
In [116]: list3.count()
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-116-d977b332b071> in <module>()
----> 1 list3.count()
TypeError: count() takes exactly one argument (0 given)
In [117]: list3.remove(1)
In [118]: list3
Out[118]: ['b', (1,)]
In [119]: help(list3.remove)
In [120]: pop()
---------------------------------------------------------------------------
NameError Traceback (most recent call last)
<ipython-input-120-de840d9b1602> in <module>()
----> 1 pop()
NameError: name 'pop' is not defined
In [121]: 'a' in list3;
In [122]: 'a' in list3
Out[122]: False
In [123]: list3.pop(0)
Out[123]: 'b'
In [124]: list3.pop(1)
---------------------------------------------------------------------------
IndexError Traceback (most recent call last)
<ipython-input-124-48a521f74801> in <module>()
----> 1 list3.pop(1)
IndexError: pop index out of range
In [125]: list3
Out[125]: [(1,)]
In [126]: list3.append(4,5)
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-126-cd4f2cf121c4> in <module>()
----> 1 list3.append(4,5)
TypeError: append() takes exactly one argument (2 given)
In [127]: list3.append(4)
In [128]: list3.append(5)
In [129]: list3
Out[129]: [(1,), 4, 5]
In [130]: list3.pop(2)
Out[130]: 5
In [131]: help(list3.pop(0))
In [132]: help(list3.pop())
In [133]: help(list3.pop)
In [134]: list3
Out[134]: []
In [136]: list3.append('a')
In [137]: list3.append(3)
In [138]: list3.append(4)
In [139]: list3.append(5)
In [140]: list3
Out[140]: ['a', 3, 4, 5]
In [142]: list3.insert(1,'list1')
In [143]: list3
Out[143]: ['a', 'list1', 3, 4, 5]
In [150]: list1=[]
In [151]:
In [151]: list3=[]
In [152]: list3.insert(1, list1)
In [153]: list3
Out[153]: [[]]
In [154]: list3[0].append('abc')
In [155]: list3
Out[155]: [['abc']]
