Python--列表操作

# #-*- coding: utf-8 -*-
'''
@author: soyo
'''
import numpy
import pandas 
import math as m
from _ctypes import Array
from _collections import deque
a="soyo"
b=200
s=0
c=b%6
d=m.sqrt(25)
while b:
    s+=b 
    b-=1
print s
print d
for a in ['e','f','g']:
    print a
for a in "soyo":
    print a
for a in [1,2,"soyo",8,9]:
    print a
    if a=="soyo":
        for b in a:
            print b 
f=range(20)
for a in f:
    print a      
    if a==10:
        print "soyo88"
w=range(3,8)
for a in w:
    print a 
r=range(2,15,3)
for a in r:
    print a
print "*************"  
l=[1,2,3]
for a in l:
    a+=1;
    print a  
print l
print "******************"
for i in range(len(l)):
    l[i]+=1
    print l[i]    
else:
    print "soyosoyo"
print l
print len(l)    
print "************列表操作***********"                        
print "列表切片操作："
p=[1,2,4,5,22,66,78,89,"soyo",56,22,88,22]
p3=["soyo2",778,999]
print p[0]
print p[1]
print p[-1]
print p[-2]
p2=p[1:5]
print p2
print "列表添加操作"
p.append(100)
print p
print "/*/*/*/*/*"
p.append(p2)      #想要去掉新列表中的[]改用p.extend(p2)
print p 
print "/*/*/*/*/*"
print p[-1]
for a in p[-1]:
    print a
p.insert(2, "soyo5")
print p
p.remove(4)
print p
p.pop(2)
print p
print p.index("soyo")
print "//////////"
print p
print p.count(2)
p.sort()
print p
p.reverse()
print p
print "列表 用作栈"
p4=[1,2,5]
p4.append(20)
p4.append(98)
print p4
p4.pop()
print p4.pop()  #出栈的元素
print p4
print "列表 用作队列" #可以实现但是效率不高
print "deque 用作队列"  #队列实现改用deque
p6=deque([8,9,10])
p6.append(11)
p6.append(12)
print p6
p6.popleft()
print p6.popleft()
print p6

结果：20100
5.0
e
f
g
s
o
y
o
1
2
soyo
s
o
y
o
8
9
0
1
2
3
4
5
6
7
8
9
10
soyo88
11
12
13
14
15
16
17
18
19
3
4
5
6
7
2
5
8
11
14
*************
2
3
4
[1, 2, 3]
******************
2
3
4
soyosoyo
[2, 3, 4]
3
************列表操作***********
列表切片操作：
1
2
22
88
[2, 4, 5, 22]
列表添加操作
[1, 2, 4, 5, 22, 66, 78, 89, 'soyo', 56, 22, 88, 22, 100]
/*/*/*/*/*
[1, 2, 4, 5, 22, 66, 78, 89, 'soyo', 56, 22, 88, 22, 100, [2, 4, 5, 22]]
/*/*/*/*/*
[2, 4, 5, 22]
2
4
5
22
[1, 2, 'soyo5', 4, 5, 22, 66, 78, 89, 'soyo', 56, 22, 88, 22, 100, [2, 4, 5, 22]]
[1, 2, 'soyo5', 5, 22, 66, 78, 89, 'soyo', 56, 22, 88, 22, 100, [2, 4, 5, 22]]
[1, 2, 5, 22, 66, 78, 89, 'soyo', 56, 22, 88, 22, 100, [2, 4, 5, 22]]
7
//////////
[1, 2, 5, 22, 66, 78, 89, 'soyo', 56, 22, 88, 22, 100, [2, 4, 5, 22]]
1
[1, 2, 5, 22, 22, 22, 56, 66, 78, 88, 89, 100, [2, 4, 5, 22], 'soyo']
['soyo', [2, 4, 5, 22], 100, 89, 88, 78, 66, 56, 22, 22, 22, 5, 2, 1]
列表 用作栈
[1, 2, 5, 20, 98]
20
[1, 2, 5]
列表 用作队列
deque 用作队列
deque([8, 9, 10, 11, 12])
9
deque([10, 11, 12])