PYTHON

create or append dataframe to csv python

import os

# if file does not exist write header 
if not os.path.isfile('filename.csv'):
   df.to_csv('filename.csv', header='column_names')
else: # else it exists so append without writing the header
   df.to_csv('filename.csv', mode='a', header=False)

python append csv to dataframe

import pandas as pd
import glob

path = r'C:DRODCL_rawdata_files' # use your path
all_files = glob.glob(path + "/*.csv")

li = []

for filename in all_files:
    df = pd.read_csv(filename, index_col=None, header=0)
    li.append(df)

frame = pd.concat(li, axis=0, ignore_index=True)

Append dataframe to csv python pandas

df.to_csv('test_scores.csv', mode='a', index=False, header=False)