A common approach to Python learning path-list

Increase

• Append ()
• Insert (index,obj) #可以向指定位置添加

  1 __author__ " Kuankuan " 2 list = []3 list.append ("jankinyu")4 list.insert (0,"kali")5print(list)
  #输出结果
  #[' kali ', ' Jankinyu ']

By deleting

• Pop () #可以删除指定位置如果不给参数默认删除最后一个
• Remove () #可以删除指定的一个值
• Del

• List1 = ["Jankinyu", "Kuankuan", "Comb", "card Farmer"]
  Print (List1)
  List1.remove ("Comb")Print(List1) list1.pop ()Print(List1)delList1[1]Print(List1)#Output results
  #[' Jankinyu ', ' Kuankuan ', ' comb ', ' chi Nong ']
  #[' Jankinyu ', ' Kuankuan ', ' Chi Nong ']#[' Jankinyu ', ' Kuankuan ']#[' Jankinyu ']

Change

• List[index]=value

• LIST3 = ['1','2','3','4','5','6','7','8','9']list3[8] = 666Print(LIST3)#Output Results#[' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ', ' 7 ', ' 8 ', 666]

Check

• Index () #查找值的下标
• Slice List[start:end:step]

  LIST3 = ['1','2','3','4','5','6','7','8','9']Print(List3[0:9:2])Print("take the value of subscript 0-4 in the LIST3:", List3[0:5])Print(LIST3)#Output Results#[' 1 ', ' 3 ', ' 5 ', ' 7 ', ' 9 ']#take the value of subscript 0-4 in list3: [' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ']#8

Copy

• • Alias bindings: List1=list2
  • A shallow copy of 4 ways
    
    • Names1 = Names.copy () # Shallow copy equivalent to Copy.copy ()
    • Names2 = copy.copy (names)
    • Names3 = names[:]
    • NAMES4 = list (names)

Deep copy: List2=copy.deepcopy (List1)

1 __author__="Kuankuan"2 ImportCopy3list_name=[1,2,3,4,5]4Name=list_name.copy ()5 Print(name)6name1=copy.copy (list_name)7 Print(name1)8Name2=list_name[:]9 Print(name2)Tenname3=list (list_name) One Print(List_name) Ab=copy.deepcopy (list_name) - Print(b)

Other

• • Count: Count ()
  • Invert: Reverse ()
  • Sort: Sort () # Follow the rules of the ASCII code table
  • Extension: Extend ()
  • Traverse: for...in ...
  • Empty: Clear ()

A common approach to Python learning path-list