Python如何使用运算符函数（详细指南|S2） _Python开发

Python中的运算符函数|S1
本文讨论了更多功能。
1. setitem(ob, pos, val)：-此函数用于在容器的特定位置赋值。
操作- ob[pos] = val
2. delitem(ob, pos)：—该函数用于删除容器中特定位置的值。
操作- del ob[pos]
3. getitem(ob, pos):—这个函数用于访问容器中特定位置的值。
操作- ob (pos)

# Python code to demonstrate working of # setitem(), delitem() and getitem()# importing operator module import operator# Initializing list li = [ 1 , 5 , 6 , 7 , 8 ]# printing original list print ( "The original list is : " , end = "") for i in range ( 0 , len (li)): print (li[i], end = " " )print ( "\r" )# using setitem() to assign 3 at 4th position operator.setitem(li, 3 , 3 )# printing modified list after setitem() print ( "The modified list after setitem() is : " , end = "") for i in range ( 0 , len (li)): print (li[i], end = " " )print ( "\r" )# using delitem() to delete value at 2nd index operator.delitem(li, 1 )# printing modified list after delitem() print ( "The modified list after delitem() is : " , end = "") for i in range ( 0 , len (li)): print (li[i], end = " " )print ( "\r" )# using getitem() to access 4th element print ( "The 4th element of list is : " , end = "") print (operator.getitem(li, 3 ))

输出如下：

The original list is : 1 5 6 7 8 The modified list after setitem() is : 1 5 6 3 8 The modified list after delitem() is : 1 6 3 8 The 4th element of list is : 8

4. setitem(ob, slice(a,b)， vals):-该函数用于设置容器中特定范围内的值。
操作- obj[a:b] = vals
5. delitem(ob, slice(a,b)):-这个函数用于删除容器中特定范围内的值。
【Python如何使用运算符函数（详细指南|S2）】操作- del obj[a:b]
6. getitem(ob, slice(a,b)):-这个函数用于访问容器中特定范围内的值。
操作——obj [a, b]

# Python code to demonstrate working of # setitem(), delitem() and getitem()# importing operator module import operator# Initializing list li = [ 1 , 5 , 6 , 7 , 8 ]# printing original list print ( "The original list is : " , end = "") for i in range ( 0 , len (li)): print (li[i], end = " " )print ( "\r" )# using setitem() to assign 2, 3, 4 at 2nd, 3rd and 4th index operator.setitem(li, slice ( 1 , 4 ), [ 2 , 3 , 4 ])# printing modified list after setitem() print ( "The modified list after setitem() is : " , end = "") for i in range ( 0 , len (li)): print (li[i], end = " " )print ( "\r" )# using delitem() to delete value at 3rd and 4th index operator.delitem(li, slice ( 2 , 4 ))# printing modified list after delitem() print ( "The modified list after delitem() is : " , end = "") for i in range ( 0 , len (li)): print (li[i], end = " " )print ( "\r" )# using getitem() to access 1st and 2nd element print ( "The 1st and 2nd element of list is : " , end = "") print (operator.getitem(li, slice ( 0 , 2 )))

输出如下：

The original list is : 1 5 6 7 8 The modified list after setitem() is : 1 2 3 4 8 The modified list after delitem() is : 1 2 8 The 1st and 2nd element of list is : [1, 2]

7. concat(ob1,obj2):—这个函数用于连接两个容器。
操作- obj1 + obj2
8. contains(ob1,obj2):—这个函数用于检查obj1中是否有obj2。
操作- obj1中的obj2

# Python code to demonstrate working of # concat() and contains()# importing operator module import operator# Initializing string 1 s1 = "geeksfor"# Initializing string 2 s2 = "geeks"# using concat() to concatenate two strings print ( "The concatenated string is : " , end = "") print (operator.concat(s1, s2))# using contains() to check if s1 contains s2 if (operator.contains(s1, s2)): print ( "geeksfor contains geeks" ) else : print ( "geeksfor does not contain geeks" )

输出如下：

The concatenated string is : lsbin geeksfor contains geeks

9. and_(a,b):-该函数用于按位计算上述参数。
操作- a和b
10. or_(a,b):-该函数用于按位计算或计算上述参数。
操作- a | b
11. xor(a,b):-这个函数用于计算上述参数的按位异或值。
运算- a ^ b
12. invert(a):-这个函数用于计算上述参数的位反转。
操作- ~ a

# Python code to demonstrate working of # and_(), or_(), xor(), invert()# importing operator module import operator# Initializing a and ba = 1b = 0# using and_() to display bitwise and operation print ( "The bitwise and of a and b is : " , end = "") print (operator.and_(a, b))# using or_() to display bitwise or operation print ( "The bitwise or of a and b is : " , end = "") print (operator.or_(a, b))# using xor() to display bitwise exclusive or operation print ( "The bitwise xor of a and b is : " , end = "") print (operator.xor(a, b))# using invert() to invert value of a operator.invert(a)# printing modified value print ( "The inverted value of a is : " , end = "") print (a)

输出如下：