python基础1.5

一.列表

# li = ['alex',[1,2,3],'wusir','egon','女神','taibai']
# l1 = li[0]
# print(l1)
# l2 = li[1]
# print(l2)
# l3 = li[0:3]
# print(l3)

2.增加 append insert

# li.append('日天')
# li.append(1)
# print(li)
# while 1:
#     username = input('>>>')
#     if username.strip().upper() == 'Q':
#         break
#     else:
#         li.append(username)
# print(li)
# li.insert(4,'春哥')
# print(li)
# li.extend('二哥')
# li.extend([1,2,3])
# print(li)

3.删

li = ['taibai','alex','wusir','egon','女神',]
name = li.pop(1)  # 返回值
name = li.pop()  # 默认删除最后一个
print(name,li)

# li.remove('taibai')  # 按元素去删除
# print(li)

# li.clear()  # 清空
# print(li)

# del li
# del li[0:2]  # 切片去删除
# print(li)

4.改

# li[0] = '男兽'
# li[0] = [1,2,3]
#切片
# li[0:3] = '云姐plfdslkmgdfjglk'
# li[0:3] = [1,2,3,'春哥','咸鱼哥']
# print(li)

5.查

# for i in li:
#     print(i)
# print(li[0:2])

6.公共方法

# l = len(li)
# print(l)
# num = li.count('taibai')
# print(num)
# print(li.index('wusir'))
# li = [1,5,4,7,6,2,3]
# #正向排序
# # li.sort()
# # print(li)
# #反向排序
# # li.sort(reverse=True)
# # print(li)
# #反转
# li.reverse()
# print(li)

7.列表嵌套

li = ['taibai','武藤兰','苑昊',['alex','egon',89],23]

print(li[1][1])
name = li[0].capitalize()
print(name)
li[0] = name
li[0] = li[0].capitalize()
#li[2] = '苑日天'
print(li[2].replace('昊','ritian'))
li[2] = li[2].replace('昊','ritian')
li[3][0] = li[3][0].upper()
print(li)

二.元祖

1.#元祖只读列表，可循环查询，可切片。

#儿子不能改，孙子可能可以改。

tu = (1,2,3,'alex',[2,3,4,'taibai'],'egon')
print(tu[3])
print(tu[0:4])
for i in tu:
    print(i)
tu[4][3]=tu[4][3].upper()
print(tu)
tu[4].append('sb')
print(tu)

2.str跟list转换

s = 'alex'
s1 = 'sb'.join(s)
print(s1)
#列表转化成字符串  list -----> str    join
li = ['taibai','alex','wusir','egon','女神',]
s = '++++'.join(li)
#str ----->list   split()
print(s)

3.range的使用

#range  [1,2,3,4,5,6,.......100........]
'''
for i in range(3,10):
    print(i)
for i in range(10):
    print(i)
for i in range(0,10,3):
    print(i)
for i in range(10,0,-2):
    print(i)
for i in range(10,-1,-2):
    print(i)
'''
li = [1,2,3,5,'alex',[2,3,4,5,'taibai'],'afds']
for i in li:
    if type(i) == list:
        for k in i:
            print(k)
    else:print(i)
'''
for i in range(len(li)):
    if type(li[i]) == list:
        for j in li[i]:
            print(j)
    else:print(li[i])
'''

猜你喜欢