openpyxl convert CSV to EXCEL

Question

How can I convert a CSV file with : delimiter to XLS (Excel sheet) using openpyxl module?

Asked By: Satish

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Answer 1

import csv
from openpyxl import Workbook
from openpyxl.cell import get_column_letter

f = open(r'C:UsersAsusDesktopherp.csv')

csv.register_dialect('colons', delimiter=':')

reader = csv.reader(f, dialect='colons')

wb = Workbook()
dest_filename = r"C:UsersAsusDesktopherp.xlsx"

ws = wb.worksheets[0]
ws.title = "A Snazzy Title"

for row_index, row in enumerate(reader):
    for column_index, cell in enumerate(row):
        column_letter = get_column_letter((column_index + 1))
        ws.cell('%s%s'%(column_letter, (row_index + 1))).value = cell

wb.save(filename = dest_filename)

Answered By: John

Answer 2

A much simpler, minimalist solution:

import csv
import openpyxl

wb = openpyxl.Workbook()
ws = wb.active

with open('file.csv') as f:
    reader = csv.reader(f, delimiter=':')
    for row in reader:
        ws.append(row)

wb.save('file.xlsx')

Answered By: Adam Stewart

Answer 3

Here is Adam’s solution expanded to strip out characters that openpyxl considers illegal and will throw an exception for:

import re
from openpyxl.cell.cell import ILLEGAL_CHARACTERS_RE
...
##ws.append(row) - Replace with the code below
for i in row:
    ws.append([ILLEGAL_CHARACTERS_RE.sub('',i)])

ILLEGAL_CHARACTERS_RE is a compiled regular expression containing the characters openpyxl deems “illegal”. The code is simply substituting those characters with an empty string.

Source: Bitbucket openpyxl issue #873 – Remove illegal characters instead of throwing an exception

Answered By: Jaws

Answer 4

On top of the suggestion by John, I slightly modified my script using function to remove the apostrophe of string for all raw data. This way, I managed to check all raw data (string and number), which were also placed in respective cell. Lastly, I assign numeric data to float type starting from row 20 onward. This is because all numeric data existed from row 20th onward, while all data above were text only.

cell_value = cell.replace(‘"’, ”)

Below is my script:

import csv
from openpyxl import Workbook

wb = Workbook()
ws = wb.active

with open(filepath1_csv) as f:
reader = csv.reader(f)
for row_index, row in enumerate(reader):
    for column_index, cell in enumerate(row):
        column_letter = column_index + 1
        cell_value = cell.replace('"', '')
        ws.cell(row = row_index + 1, column = column_letter).value = cell_value

for row in ws.iter_rows(min_row=20, min_col=1, max_col=5, 
max_row=ws.max_row):
for cell in row:
    if cell.value is None:
        break
    else:
        cell.value = float(cell.value)

wb.save(filename = filepath1_xlsx)

Answered By: Eureka JX

openpyxl convert CSV to EXCEL

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