我有一本具有数千个键的字典,如下所示:
my_dictionary:
{'key1':[['ft1',[2,4,12,2]],['ft2',[0,3,3,1]],'key2':[['ft1',[5,0,2,9]],['ft2',[10,39,3,2]]}
现在,我想将此字典转换为数据帧,其中键应为特定列,并且要素(ft1,ft2,..)及其值也将转换为不同的列。所以我想要的数据框应该是这样的:
my_new_dataframe:
ID, ft1_sig,ft1_med,ft1_les,ft1_non,ft2_sig,ft2_med,ft2_les,ft2_non,...
key1 2 4 12 2 0 3 3. 1
key2 5. 0. 2. 9. 10. 39 3. 2
...
keyn. .. .. .. ..
答案 0 :(得分:1)
我为此尝试了一种解决方案,但是它要求每个键(即key1,key2等)都包含您要在字典中使用的ft属性。另外,您是否为原始列表缺少“]”?当我粘贴到翻译器时,它不匹配。
import pandas as pd
#added method to change your original dictionary to one that I can manipulate with the method below.
#If you compare the values of new_dict and data using ==, it returns true.
my_dictionary = {'key1':[['ft1',[2,4,12,2]],['ft2',[0,3,3,1]]],'key2':[['ft1',[5,0,2,9]],['ft2',[10,39,3,2]]]}
new_dict ={}
for element in my_dictionary:
print(element)
print(my_dictionary[element])
new_dict[element] = dict(my_dictionary[element])
print(new_dict)
data = {
'key1':{
'ft1':[2,4,12,2],
'ft2':[0,3,3,1]
},
'key2':{
'ft1':[5,0,2,9],
'ft2':[10,39,3,2]
}
}
keys = list(data.keys())
df = pd.DataFrame.from_dict(data).T
df2 = pd.DataFrame(df.ft1.values.tolist()).add_prefix('ft1_')
df3 = pd.DataFrame(df.ft2.values.tolist()).add_prefix('ft2_')
df4 = pd.merge(df2,df3,left_index=True,right_index=True)
df4.index=keys
print(df4)
以下是输出:
答案 1 :(得分:1)
我在您的示例中添加了更多数据,以表明如果添加了新功能或行(键),该脚本将很灵活。
在这里
mydict = {'key1':[['ft1',[2,4,12,2]],['ft2',[0,3,3,1]],['ft3',[0,3,3,1]]],
'key2':[['ft1',[5,0,2,9]],['ft2',[10,39,3,2]],['ft3',[0,3,3,1]]]
,'key3':[['ft1',[5,0,2,9]],['ft2',[10,39,3,2]],['ft3',[0,3,3,1]]]}
df = pd.DataFrame(mydict).T
colname = [df[c][0][0] for c in df]
df = df.applymap(lambda c: c[1])
df.reset_index(level=0, inplace=True)
df.columns=['ID'] + colname
s=['_sig','_med','_les','_non']
def f(x):
return pd.Series([x[0], x[1], x[2], x[3]])
for col in colname:
df[[col+'_sig', col+'_med', col+'_les', col+'_non']]= df[col].apply(lambda x: f(x))
df.drop(colname, axis=1, inplace=True)
df
结果:
ID ft1_sig ft1_med ft1_les ft1_non ft2_sig ft2_med ft2_les ft2_non ft3_sig ft3_med ft3_les ft3_non
0 key1 2 4 12 2 0 3 3 1 0 3 3 1
1 key2 5 0 2 9 10 39 3 2 0 3 3 1
2 key3 5 0 2 9 10 39 3 2 0 3 3 1