python - 如何将单词计数转换为 Python 中的实际单词列表

Question

我有以下 Pandas 数据框，其中包含每个单词的频率:

d = {'Count' : pd.Series([2, 3, 5]), 'Term': pd.Series(['Cool', 'New', 'Very'])}
df = pd.DataFrame(d)

表格(打印 df):

  Count     Term  
0   2       Cool  
1   3       New  
2   5       Very   

但是，我想将每个单词的字面频率转换为一个名为“Term”的列中每个相应频率的单词列表:

输出看起来像这样:

c = {'Term': pd.Series(['Cool', 'Cool', 'New','New','New','Very', 'Very','Very','Very','Very'])}
df_2 = pd.DataFrame(c)
print df_2


        Term 
0       Cool 
1       Cool    
2       New   
3       New   
4       New    
5       Very   
6       Very   
7       Very   
8       Very   
9       Very   

有人可以帮助我构建可扩展的东西来实现这一目标吗？

Answer 1

IIUC pandas 重复

df.Term.repeat(df.Count)
Out[350]: 
0    Cool
0    Cool
1     New
1     New
1     New
2    Very
2    Very
2    Very
2    Very
2    Very
Name: Term, dtype: object