出錯轉換的元組到大熊貓數據幀

Question

當我嘗試轉換的元組到大熊貓數據幀我得到以下錯誤：

DataFrame constructor not properly called!

我使用下面的代碼

columnlist=["Timestamp","Price","Month","Day","DayofWeek","tDaysleftMonth","tDayinMonth","tDayinWeek"] 
tickerData=pd.DataFrame(tickerDataRaw,columns=columnlist) 

的數據加載到來自MySQL數據庫的元組，

請找到數據的屏幕截圖。 Data I am trying to convert

Answer 1

我認爲你可以使用DataFrame.from_records與轉換tuples到list：

import pandas as pd 

tuples = ((1,2,3),(4,6,7),(7,3,6),(8,2,7),(4,6,3),(7,3,6)) 

columnlist = ['a','b','c'] 
df = pd.DataFrame.from_records(list(tuples), columns=columnlist) 
print (df) 
    a b c 
0 1 2 3 
1 4 6 7 
2 7 3 6 
3 8 2 7 
4 4 6 3 
5 7 3 6 

只有DataFrame構造另一種解決方案：

import pandas as pd 

tuples = ((1,2,3),(4,6,7),(7,3,6),(8,2,7),(4,6,3),(7,3,6)) 

columnlist = ['a','b','c'] 
df = pd.DataFrame(list(tuples), columns=columnlist) 
print (df) 
    a b c 
0 1 2 3 
1 4 6 7 
2 7 3 6 
3 8 2 7 
4 4 6 3 
5 7 3 6 

編輯：

如果檢查DataFrame和參數data ：

data : numpy ndarray (structured or homogeneous), dict, or DataFrame

Dict can contain Series, arrays, constants, or list-like objects

Answer 2

按照Dataframe documentation page，數據要求是

numpy ndarray (structured or homogeneous), dict, or DataFrame

最簡單的方法來解決你的問題是simplty在numpy的陣列加載數據，它應該工作的罰款。

>>> tuples = ((1,2,3),(1,2,3),(1,2,3)) 
>>> columns = ["A", "B", "C"] 
>>> pd.DataFrame(tuples, columns=columns) 
PandasError: DataFrame constructor not properly called! 

>>> pd.DataFrame(np.array(tuples), columns=columns) 
    A B C 
0 1 2 3 
1 1 2 3 
2 1 2 3