Python List Method Summary

1. Add a new element to the tail of the list

Append (...)

L.append (object)--Append object to end

1234	>>> a = [ ' Sam ' 24 ' Shaw ' ] >>> a.append ( ' " >>> a [ ' Sam ' 24 Shaw ' " "

2. Find The number of value in list

Count (...)

L.count (value), integer--Returnnumber of occurrences of value

123	>>> L =[12,‘school‘,‘ball‘,24,12]>>> L.count(12)2

3. to append multiple values from another sequence at the end of the list (extend the original list with a new list)

Extend (...)

12345

>>> L =[12,‘school‘,‘ball‘,24,12]>>> S =[‘haha‘,25,‘mail‘]>>> L.extend(S)>>> L[12, ‘school‘, ‘ball‘, 24, 12,‘haha‘, 25, ‘mail‘]

4. To insert the specified object into the list

Insert (Index,object)

1234	>>> L = [ 12 ' school ' 12 ] >>>l.insert ( 0 Shaw ' ) >>> L [ ' Shaw ' 12 ' school ' 12

5. used to remove an element from the list (the last element by default), and returns the value of the element.

Pop (...)

Description:

l.pop ([index]), item--Remove Andreturn item at index (default last). raisesindexerror If list is empty or index was out of range .

12345

>>> L = [ ' Shaw ' 12 ' school ' Code class= "Python plain", 12 ] >>> l.pop ()    # (delete the last one by default) Code class= "Python value" >12 >>> L.pop ( 0 ) ' Shaw '          # (delete first)

6.   detects if a substring contains substrings  str   beg (start) and  end (end)   str not in string

Str.index (str, beg=0, End=len (String))

Parameters:

STR-- specifies the retrieved string

Beg-- start index, default to 0 .

End-- The end index, which defaults to the length of the string.

1234567

>>> L = [‘shaw‘, 12,‘school‘, 12]>>> L.index(‘shaw‘)0>>> L.index(‘sam‘)Traceback (most recent calllast):  File "<input>", line 1, in<module>ValueError: ‘sam‘ isnot in list

7. used to remove the first matching element of a value in the list.

L.remove (value)

Raises ValueError If the value is not present.

1234567

>>> L = [‘shaw‘, 12,‘school‘, 12]>>> L.remove(12)>>> L[‘shaw‘, ‘school‘, 12]>>> L.remove(12)>>> L[‘shaw‘, ‘school‘]

8. used to reverse the elements in the list (reverse-order the elements of the list)

Reverse (...)

1234	>>> L = [ ' Shaw ' 12 ' school ' Code class= "Python plain" > >>> l.reverse () >>> L [ ' school ' , 12 ' Shaw '

9. used to sort the original list, if a parameter is specified, use the comparison function specified by the comparison function. ( sort value in list (first digit, in uppercase letters, lowercase letters))

L.sort (Cmp=none, Key=none, Reverse=false)

1234	>>> L = [‘Shaw‘, 12,‘abc‘,24,‘biu‘,‘cd‘]>>> L.sort()>>> L[12, 24, ‘Shaw‘, ‘abc‘, ‘biu‘,‘cd‘]

Python List Method Summary