Question about insert from TK form to csv file - pandas

Question

I am trying to get some info from TK form that i built to new CSV file, unfortunately i am getting some Errors.
The code:
def sub_func():
with open('Players.csv','w') as df:
df = pd.DataFrame
i=len(df.index)
data=[]
data.append(entry_box1.get())
data.append(entry_box2.get())
data.append(entry_box3.get())
data.append(entry_box4.get())
if i==4:
df.loc[i,:]=data
The Errors:
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Users\user\AppData\Local\Programs\Python\Python38-32\lib\tkinter\_init.py", line 1883, in __call_
return self.func(*args)
File "C:/Users/user/PycharmProjects/test11/Final Project/registration form.py", line 23, in sub_func
i=len(df.index)
TypeError: object of type 'pandas._libs.properties.AxisProperty' has no len()

Answer 1

You have two problems in your code:
The file is opened as df, but df is overwritten on the next line
df = pd.DataFrame does not return anything as it would need parenthesis () to create a dataframe. This means that df does not exist -> error comes when you try to take length of 'nothing'.
Solution:
df = pd.read_csv('./Players') # Make sure that the file is in the same directory
i = len(df.index)
Not sure what you are trying to achieve, but you might need to work on the rest of the code, too.