编程输入一段英文，统计英文中单词出现的次数，并输出结果

Question

 

Answer 1

# 统计单词出现次数并把结果输出成字典
# 数据输入
str = "Hello world, There are some test words. Hello world, There are some test words. Haha!"

# 过滤规则:过滤掉所有非字母的字符
import re
str = re.sub(r"[^a-zA-Z]+", " ",str)
print("过滤后的字符串：",str)

#拆分成列表
str = str.split(" ")
# 去除多余的空项
str.remove("")
print("拆分成列表：",str)

# 生成字典的key列表
dict_keys = []
for i in str:
	if i not in dict_keys:
		dict_keys.append(i)
print("key列表：",dict_keys)

# 输出字典

# 定义空字典
words_dict = {}

# 往字典写入key值
words_dict.fromkeys(dict_keys)

# 遍历key列表,利用count函数统计单词出现次数
for j in dict_keys:
	words_dict[j] = str.count(j)
print("字典：",words_dict)