Transform 3 Columns into Single Column

[Pedroski55]

I am really not familiar with Pandas, never having large amounts of data to process, but this seems to work
pd.options.display.float_format = '{:,.2f}'.format (change the 2 for more decimal places I believe)

import pandas as pd

csv_file = '/home/pedro/myPython/pandas/testme.csv'
savepath = '/home/pedro/myPython/pandas/'
pd.options.display.float_format = '{:,.2f}'.format
df = pd.read_csv(csv_file)

# get each column 
columns = ['col1', 'col2', 'col3'] # put your column headers

for colnr in columns:
    mydf = df[colnr]
    mydf.to_csv(savepath + colnr + '.csv', index=False)