Python - 从大型文本文件中检索特定句子
Python - retrieve a specific sentence from a large text file
这是我的句子：
s = "& how are you then? I am fine, % and i want to found some food #meat with vegetable# #tea# #cake# and #tea# so on."
我想计算句子 s 中被 # # 约束的词的出现频率。
我想要以下输出
[("meat with vegetable", 1)
("tea", 2)
("cake", 1)]
非常感谢您的帮助和时间！
利用re和Counter的力量，这个任务可以轻松完成：
In [1]: import re
In [2]: s = "& how are you then? I am fine, % and i want to found some food #meat with vegetable# #tea# #cake# and #tea# so on."
In [3]: re.findall(r'#([^#]*)#', s)
Out[3]: ['meat with vegetable', 'tea', 'cake', 'tea']
In [4]: from collections import Counter
In [5]: Counter(re.findall(r'#([^#]*)#', s))
Out[5]: Counter({'tea': 2, 'cake': 1, 'meat with vegetable': 1})
阅读 python re and collections.Counter 上的文档获取更多信息。
这是我的句子：
s = "& how are you then? I am fine, % and i want to found some food #meat with vegetable# #tea# #cake# and #tea# so on."
我想计算句子 s 中被 # # 约束的词的出现频率。
我想要以下输出
[("meat with vegetable", 1)
("tea", 2)
("cake", 1)]
非常感谢您的帮助和时间！
利用re和Counter的力量，这个任务可以轻松完成：
In [1]: import re
In [2]: s = "& how are you then? I am fine, % and i want to found some food #meat with vegetable# #tea# #cake# and #tea# so on."
In [3]: re.findall(r'#([^#]*)#', s)
Out[3]: ['meat with vegetable', 'tea', 'cake', 'tea']
In [4]: from collections import Counter
In [5]: Counter(re.findall(r'#([^#]*)#', s))
Out[5]: Counter({'tea': 2, 'cake': 1, 'meat with vegetable': 1})
阅读 python re and collections.Counter 上的文档获取更多信息。