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Python: Reads a CSV file and remove initial spaces, quotes around each entry and the delimiter

Python CSV File Reading and Writing: Exercise-6 with Solution

Write a Python program that reads a CSV file and remove initial spaces, quotes around each entry and the delimiter.

Sample Solution:

Python Code :

import csv
csv.register_dialect('csv_dialect',
                    delimiter='|',
                    skipinitialspace=True,
                    quoting=csv.QUOTE_ALL)
with open('temp.csv', 'r') as csvfile:
   reader = csv.reader(csvfile, dialect='csv_dialect')
   for row in reader:
       print(row)

temp.csv

"country_id"|"country_name"|"region_id"
"AR"|"Argentina"| 2
"AU"|"Australia"| 3
"BE"|"Belgium"| 1
"BR"|"Brazil"| 2
"CA"|"Canada"| 2

Sample Output:

['country_id', 'country_name', 'region_id']
['AR', 'Argentina', '2']
['AU', 'Australia', '3']
['BE', 'Belgium', '1']
['BR', 'Brazil', '2']
['CA', 'Canada', '2']

Python Code Editor:


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Previous: Write a Python program to read a given CSV files with initial spaces after a delimiter and remove those initial spaces.
Next: Write a Python program to read specific columns of a given CSV file and print the content of the columns.

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m