python - Delete blank rows from CSV? -

i have large csv file in rows entirely blank. how use python delete blank rows csv?

after suggestions, have far

import csv  # open input csv reading inputcsv = open(r'c:\input.csv', 'rb')  # create output csv writing outputcsv = open(r'c:\output.csv', 'wb')  # prepare output csv appending appendcsv = open(r'c:\output.csv', 'ab')  # create reader object cr = csv.reader(inputcsv, dialect = 'excel')  # create writer object cw = csv.writer(outputcsv, dialect = 'excel')  # create writer object append ca = csv.writer(appendcsv, dialect = 'excel')  # add pre-defined fields cw.writerow(['field1_','field2_','field3_','field4_'])  # delete existing field names in input csv # ???????????????????????????  # loop through input csv, check blanks, , write changes append csv row in cr:     if row or any(row) or any(field.strip() field in row):         ca.writerow(row)  # close files inputcsv.close() outputcsv.close() appendcsv.close() 

is ok or there better way this?

use csv module:

import csv ...  input = open(in_fnam, 'rb') output = open(out_fnam, 'wb') writer = csv.writer(output) row in csv.reader(input):     if row:         writer.writerow(row) input.close() output.close() 

if need remove rows of fields empty, change if row: line to:

if any(row): 

and if want treat fields consist of whitespace empty can replace with:

if any(field.strip() field in row):