Python pandas - multiple columns to one series

Question

I have an excel spreadsheet with raw data in: demo-data:

1	2	3
4	5	6
7	8	9

How do I combine all the numbers to one series, so I can start doing math on it. They are all just numbers of the same "kind"

Answer 1

Given your dataframe as df , this function may help df.values.flatten() .

Answer 2

You can convert your dataframe to a list and iterate through it to extract and put values into a 1D list:

df = pd.read_excel("data.xls")
lst = df.to_numpy().tolist()
result = []
for row in lst:
    for item in row:
        result.append(item)