Python 如何修复excel文件中的双重数据输入

当使用GUI而excel文件为空时，“保存为标题”，它将插入两次信息。然后，在连续运行期间，它将不再插入excel文件

已将master.quit更改为master.destroy

import pandas as pd

def submit_fields():
    path = 'C:\Python32\RequestForm.xlsx'
    df1 = pd.read_excel(path)
    SeriesA = df1['Name']
    SeriesB = df1['Reason']
    SeriesC = df1['startDate']
    SeriesC = df1['endDate']
    A = pd.Series(entry1.get())
    B = pd.Series(entry2.get())
    C = pd.Series(entry3.get())
    D = pd.Series(entry4.get())
    SeriesA = SeriesA.append(A)
    SeriesB = SeriesB.append(B)
    SeriesC = SeriesC.append(C)
    SeriesD = SeriesD.append(D)
    df2 = pd.DataFrame({"Name":SeriesA, "Reason":SeriesB, "startDate":SeriesC, "endDate":SeriesD})
    df2.to_excel(path, index=False)
    entry1.delete(0, END)
    entry2.delete(0, END)
    entry3.delete(0, END)
    entry4.delete(0, END)

master = Tk()
master.geometry('250x250')
master.title("Request Form")

Label(master, text="Name").grid(row=0)
Label(master, text="Reason").grid(row=1)
Label(master, text="Start Date").grid(row=2)
Label(master, text="End Date").grid(row=3)


entry1 = Entry(master)
entry2 = Entry(master)
entry3 = Entry(master)
entry4 = Entry(master)

entry1.grid(row=0, column=1, pady=4)
entry2.grid(row=1, column=1, pady=4)
entry3.grid(row=2, column=1, pady=4)
entry4.grid(row=3, column=1, pady=4)


Button(master, text='Quit', command=master.destroy).grid(row=4,column=0, pady=4)
Button(master, text='Submit', command=submit_fields).grid(row=4,column=1, pady=4)

mainloop()

预期的结果是，一行应该填充来自数据输入GUI的信息。当GUI重新打开并使用时，应该可以正常工作。 实际结果，第一次起作用，但插入次数加倍。第一次之后就不工作了

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找到了问题。复制粘贴抓到我了

 SeriesA = df1['Name']
    SeriesB = df1['Reason']
    SeriesC = df1['startDate']
    **SeriesC** = df1['endDate']