python export file to csv code example

Example 1: code how pandas save csv file

df.to_csv('out.csv')

Example 2: save dataframe to csv

df.to_csv(file_name, sep='\t')

Example 3: python convert dat file to csv

import csv

with open("infile.dat") as infile, open("outfile.csv", "w") as outfile:
    csv_writer = csv.writer(outfile)
    prev = ''
    csv_writer.writerow(['ID', 'PARENT_ID'])
    for line in infile.read().splitlines():
        csv_writer.writerow([line, prev])
        prev = line

Example 4: import csv file in python

import pandas as pd

df = pd.read_csv (r'Path where the CSV file is stored\File name.csv')
print (df)

Example 5: python save as csv

import numpy as np
np.savetxt('data.csv', (col1_array, col2_array, col3_array), delimiter=',')

Example 6: Write a table to CSV file python

header = [re.sub(' +',' ',i[0][:-1].replace('\n', ' ')) for i in optionsTable[0]]

with open('test.csv', 'w') as fp:
   writer = csv.writer(fp, delimiter=',')
   writer.writerow(header)
   for row in optionsTable:
      writer.writerow([i[1] for i in row])

#Credit to https://stackoverflow.com/users/790387/burhan-khalid Burhan Khalid
#On StackOverflow.