Python的容器类型的遍历汇总

Posted 2021-03-05 liunaixu

# 遍历列表
# l = ["a","b","1",2]
# print(l)
# for i in l:
#     print(i)
#     print(type(i))

"""
[‘a‘, ‘b‘, ‘1‘, 2]
a
<class ‘str‘>
b
<class ‘str‘>
1
<class ‘str‘>
2
<class ‘int‘>
"""
# 遍历字符串
# s = "abcde"
# print(s)
# for si in s:
#     print(si)
#     print(type(si))
"""
abcde
a
<class ‘str‘>
b
<class ‘str‘>
c
<class ‘str‘>
d
<class ‘str‘>
e
<class ‘str‘>
"""
# 遍历字典
# dic = {"name":"lsj","age":18}
# print(dic,type(dic))
# for d in dic:
#     print(d,dic[d])
#     print(type(d))
"""
{‘name‘: ‘lsj‘, ‘age‘: 18} <class ‘dict‘>
name lsj
<class ‘str‘>
age 18
<class ‘str‘>
"""

# 遍历集合
# se = {"a","1","ab",1,2,4}
# print(set(se),type(se))
# for se1 in se:
#     print(se1)
#     print(type(se1))
"""
{‘a‘, ‘ab‘, 2, 1, 4, ‘1‘} <class ‘set‘>
a
<class ‘str‘>
ab
<class ‘str‘>
2
<class ‘int‘>
1
<class ‘int‘>
4
<class ‘int‘>
1
<class ‘str‘>
"""

# 遍历元组
# t = ("a","1","ab",1,2,4,)
# print(t,type(t))
# for t1 in t:
#     print(t1)
#     print(type(t1))
"""
(‘a‘, ‘1‘, ‘ab‘, 1, 2, 4) <class ‘tuple‘>
a
<class ‘str‘>
1
<class ‘str‘>
ab
<class ‘str‘>
1
<class ‘int‘>
2
<class ‘int‘>
4
<class ‘int‘>
"""