Liste metoder i Python | Sæt 2 (del, fjern(), sort(), indsæt(), pop(), forlænge()...)
Nogle af listemetoderne er nævnt i sæt 1 nedenfor
Flere metoder diskuteres i denne artikel.
1. af[a :b]
:- Denne metode
sletter alle elementer i området
startende fra indeks 'a' til 'b' nævnt i argumenter.
2. pop()
:- Denne metode
sletter
elementet
ved stillingen
nævnt i sine argumenter.
Python # Python code to demonstrate the working of # del and pop() # initializing list lis = [ 2 1 3 5 4 3 8 ] # using del to delete elements from pos. 2 to 5 # deletes 354 del lis [ 2 : 5 ] # displaying list after deleting print ( 'List elements after deleting are : ' end = '' ) for i in range ( 0 len ( lis )): print ( lis [ i ] end = ' ' ) print ( ' r ' ) # using pop() to delete element at pos 2 # deletes 3 lis . pop ( 2 ) # displaying list after popping print ( 'List elements after popping are : ' end = '' ) for i in range ( 0 len ( lis )): print ( lis [ i ] end = ' ' )
Produktion:
List elements after deleting are : 2 1 3 8
List elements after popping are : 2 1 8
3. indsæt (a x)
:- Denne funktion
indsætter et element på positionen
nævnt i sine argumenter. Det kræver 2 argumenter
position og element, der skal tilføjes på respektive position.
4. fjern()
:- Denne funktion bruges til
slette den første forekomst
antal nævnt i sine argumenter.
Python# Python code to demonstrate the working of # insert() and remove() # initializing list lis = [ 2 1 3 5 3 8 ] # using insert() to insert 4 at 3rd pos lis . insert ( 3 4 ) # displaying list after inserting print ( 'List elements after inserting 4 are : ' end = '' ) for i in range ( 0 len ( lis )): print ( lis [ i ] end = ' ' ) print ( ' r ' ) # using remove() to remove first occurrence of 3 # removes 3 at pos 2 lis . remove ( 3 ) # displaying list after removing print ( 'List elements after removing are : ' end = '' ) for i in range ( 0 len ( lis )): print ( lis [ i ] end = ' ' )Produktion:
List elements after inserting 4 are : 2 1 3 4 5 3 8
List elements after removing are : 2 1 4 5 3 8
5. sorter()
:- Denne funktion
sorterer
listen i
stigende orden
.
6. omvendt()
:- Denne funktion
vender om
elementerne i listen.
Python# Python code to demonstrate the working of # sort() and reverse() # initializing list lis = [ 2 1 3 5 3 8 ] # using sort() to sort the list lis . sort () # displaying list after sorting print ( 'List elements after sorting are : ' end = '' ) for i in range ( 0 len ( lis )): print ( lis [ i ] end = ' ' ) print ( ' r ' ) # using reverse() to reverse the list lis . reverse () # displaying list after reversing print ( 'List elements after reversing are : ' end = '' ) for i in range ( 0 len ( lis )): print ( lis [ i ] end = ' ' )Produktion:
List elements after sorting are : 1 2 3 3 5 8
List elements after reversing are : 8 5 3 3 2 1
7. forlænge(b)
:- Denne funktion bruges til
udvide listen med
elementerne i
en anden liste
. Denne funktion tager
en anden liste som argument
.
8. clear()
:- Denne funktion bruges til
slette alle elementer
af listen. Efter denne handling bliver listen tom.
Python# Python code to demonstrate the working of # extend() and clear() # initializing list 1 lis1 = [ 2 1 3 5 ] # initializing list 1 lis2 = [ 6 4 3 ] # using extend() to add elements of lis2 in lis1 lis1 . extend ( lis2 ) # displaying list after sorting print ( 'List elements after extending are : ' end = '' ) for i in range ( 0 len ( lis1 )): print ( lis1 [ i ] end = ' ' ) print ( ' r ' ) # using clear() to delete all lis1 contents lis1 . clear () # displaying list after clearing print ( 'List elements after clearing are : ' end = '' ) for i in range ( 0 len ( lis1 )): print ( lis1 [ i ] end = ' ' )Produktion:
List elements after extending are : 2 1 3 5 6 4 3
List elements after clearing are :