Python TypeError:append()缺少1个必需的位置参数:';其他';

Python TypeError:append()缺少1个必需的位置参数:';其他';,python,pandas,Python,Pandas,我有几个数据帧(形状相同),我想附加它们来创建一个更大的数据帧。T形三通单个数据帧均具有以下类型: C-Mastersheet.xlsx <class 'pandas.core.frame.DataFrame'> D-Mastersheet.xlsx <class 'pandas.core.frame.DataFrame'> L-Mastersheet.xlsx <class 'pandas.core.frame.DataFrame'> D-Ma

我有几个数据帧(形状相同),我想附加它们来创建一个更大的数据帧。T形三通单个数据帧均具有以下类型:

C-Mastersheet.xlsx   <class 'pandas.core.frame.DataFrame'>
D-Mastersheet.xlsx   <class 'pandas.core.frame.DataFrame'>
L-Mastersheet.xlsx   <class 'pandas.core.frame.DataFrame'>
D-Mastersheet.xlsx

       First Name  Last name        Dept  Location  Status      Concat 
0            Phil      Evans  Production      Hull Current   EvansPhil
1           Sarah      Heath   Marketing   Bristol Current  HeathSarah
2            Jane       Hill    Accounts   Bristol Current    HillJane
3             Amy     Cooper       Sales      Hull Current   CooperAmy
   First Name  Last name        Dept  Location  Status      Concat
0      Marcus      Price  Operations      Hull Current PriceMarcus
1      Andrew       King      Design   Bristol Current  KingAndrew
2        Emma       Lane   Marketing   Bristol Current    LaneEmma
3       Brian       Deen    Accounts   Bristol Current   DeenBrian       
4       Steve      Jacks      Design   Bristol Current  JacksSteve
L-Mastersheet.xlsx

       First Name  Last name        Dept  Location  Status      Concat 
0            Phil      Evans  Production      Hull Current   EvansPhil
1           Sarah      Heath   Marketing   Bristol Current  HeathSarah
2            Jane       Hill    Accounts   Bristol Current    HillJane
3             Amy     Cooper       Sales      Hull Current   CooperAmy
   First Name  Last name        Dept  Location  Status      Concat
0      Marcus      Price  Operations      Hull Current PriceMarcus
1      Andrew       King      Design   Bristol Current  KingAndrew
2        Emma       Lane   Marketing   Bristol Current    LaneEmma
3       Brian       Deen    Accounts   Bristol Current   DeenBrian       
4       Steve      Jacks      Design   Bristol Current  JacksSteve
我正在尝试返回输出:

  First Name  Last name        Dept  Location   Status      Concat 
 0         Jo      Jones    Accounts   Bristol Current     JonesJo
 1        Sid      Smith       Sales      Hull New        SmithSid
 2       Phil      Evans  Production      Hull Current   EvansPhil
 3      Sarah      Heath   Marketing   Bristol Current  HeathSarah
 4       Jane       Hill    Accounts   Bristol Current    HillJane
 5        Amy     Cooper       Sales      Hull Current   CooperAmy
 6     Marcus      Price  Operations      Hull Current PriceMarcus
 7     Andrew       King      Design   Bristol Current  KingAndrew
 8       Emma       Lane   Marketing   Bristol Current    LaneEmma
 9      Brian       Deen    Accounts   Bristol Current   DeenBrian       
10      Steve      Jacks      Design   Bristol Current  JacksSteve
我尝试使用以下代码来完成此操作,whioch在目录中循环:

ConsolidatedData = pd.DataFrame

for i in os.listdir(os.chdir(returnsfolder)):
    if i.endswith(".xlsx"):
        )
        rawFilePath = returnsfolder +'\\'+ i

        DeptReturn = openRawDeptReturn(rawFilePath)

        ConsolidatedData = ConsolidatedData.append(DeptReturn,ignore_index=True)
但是,我收到以下类型错误:

TypeError: append() missing 1 required positional argument: 'other'
我以前从未遇到过这个问题。

这就是问题所在:

df = pd.DataFrame           # returns class
df = df.append(DeptReturn)  # TypeError: append() missing 1 required positional argument: 'other'
错误背后的原因是方法的第一个参数是类实例。在这种情况下,类实例被推断为
DeptReturn
,并且没有提供
“other”参数

您需要的是:

df = pd.DataFrame()         # returns class instance
df = df.append(DeptReturn)  # returns instance with method applied
对于第一个参数,我们有类实例
df
,因为该方法正在该实例上应用。第二个参数是
DeptReturn


另请参见:

这不应该是
ConsolidatedData=pd.DataFrame()
?是的,就是这样……可能应该删除这个问题,因为它是一个typo@EdChum,或者(让我们不要忽略这个解释),类和类实例之间的一个基本误解@jpp当然可以,但这是由于输入错误造成的错误,不太可能对未来的访问者有帮助。我会保留你的答案,但也会保留职训局的答案。