[Python] AttributeError: 'int' object has no attribute 'dtype'

I am trying to run a script to obtain data for a number of stocks. Part of the data I am trying to obtain is a liquidity measure (called Amihud liquidity measure). I automated the script but when running the automated script, I get an error after roughly 15-20 succesful returns. How can I fix this issue?

File "script.py", line 23, in <module>
return_data = function.get_data(row[1], row[0])
File "C:\Users\leon_\function.py", line 39, in get_data
print(np.nanmean(illiq))
File "D:\Anaconda3\lib\site-packages\numpy\lib\nanfunctions.py", line 916, in nanmean
avg = _divide_by_count(tot, cnt, out=out)
File "D:\Anaconda3\lib\site-packages\numpy\lib\nanfunctions.py", line 190, in _divide_by_count
return a.dtype.type(a / b)
AttributeError: 'int' object has no attribute 'dtype'


The part of the code that handles the illiquidity measure:

# Amihuds Liquidity measure
liquidity_pricing_date = date_1 + datetime.timedelta(days=-20)
liquidity_pricing_date2 = date_1 + datetime.timedelta(days=-120)
stock_data = quandl.get(stock_ticker, start_date=liquidity_pricing_date2, end_date=liquidity_pricing_date)
p = np.array(stock_data['Adj. Close'])
returns = np.array(stock_data['Adj. Close'].pct_change())
dollar_volume = np.array(stock_data['Volume'] * p)
illiq = (np.divide(returns, dollar_volume))
print(np.nanmean(illiq))
illiquidity_measure = np.nanmean(illiq, dtype=float) * (10 ** 6) # multiply by 10^6 for expositional purposes
return [stock_vola, stock_price_average, illiquidity_measure]


Anyone has any idea on how to solve this?

EDIT: This is the script file

# Open File Dialog

root = tk.Tk()
root.withdraw()

file_path = filedialog.askopenfilename()

# Load Spreadsheet data
f = open(file_path)

csv_f = csv.reader(f)
next(csv_f)

result_data = []

# Iterate
for row in csv_f:
return_data = function.get_data(row[1], row[0])
if len(return_data) != 0:
# print(return_data)
result_data_loc = [row[1], row[0]]
result_data_loc.extend(return_data)
result_data.append(result_data_loc)

if result_data is not None:
with open('resuls.csv', mode='w', newline='') as result_file:
csv_writer = csv.writer(result_file, delimiter=',', quotechar='"', quoting=csv.QUOTE_MINIMAL)
for result in result_data:
# print(result)
csv_writer.writerow(result)
else:
print("No results found!")

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