如何連接數字字符串

Question

       ... # etc               
       MemberID = df2['Guest Number'][row_numberd2]
       MemberI = int(MemberID) # tried converting it to int
       print (MemberI)

       with open("./pdfs/" + MemberI + "%s.pdf" % i, "wb") as outputStream:
             output.write(outputStream)  
           # etc, yes, have tried using MemberI and MemberID above, both wont concatenate        

上面輸出以下錯誤； 當它是一個字符串時。 當我轉換為int時，它說它必須是字符串才能連接。 關於如何實現此目標有任何想法嗎？

TypeError: can only concatenate str (not "numpy.int64") to str # error using MemberID


TypeError: can only concatenate str (not "int") to str # Error using MemberI

Answer 1

應該：

MemberID = df2['Guest Number'].astype(str).iloc[row_numberd2]
with open("./pdfs/" + MemberID + "%s.pdf" % i, "wb") as outputStream:
             output.write(outputStream)