Python 编程操作连载之字符串,列表,字典和集合处理

from random import randint

# 生成包含重复元素的随机序列
nums = [randint(0, 10) for num in range(20)]

# 元素出现次数的统计最终肯定是一个字典，因此可以以元素的Key，出现的次数为Value
count = dict.fromkeys(nums, 0)

# 统计频次
for num in nums:
    count[num] += 1

# 排序方案一
# 根据Value进行排序
_count = sorted(count.values())
# 获取最大的次数
max = _count.pop()
keys = []

# 根据Value获取Key
for k, v in count.items():
    if v == max:
        keys.append(k)


if __name__ == '__main__':

    print(nums)
    print(count)
    print(_count)
    print(max)
    print(keys)

# 排序方案二
from collections import Counter
_count = Counter(count)

# 中间代码不变

if __name__ == '__main__':

    print(nums)
    print(count)
    print(_count)
    print(_count.most_common())
    # 获取出现频次最高的三个元素
    print(_count.most_common(3))

import re
from collections import Counter

zen = open('zen.txt').read()
# 分割所有单词
zen = re.split('\W+', zen)
# print(zen)

_zen = Counter(zen)
print(_zen)
_zen_3 = _zen.most_common(3)
print('前三个出现频次最高的词：', _zen_3)