Is it possible to observe the max row of a sheet for changes? I have some functions I'd like to run everytime that value is updated (they would be the observers).
Does openpyxl support that?
from openpyxl import Workbook
from openpyxl import load_workbook
wb = load_workbook('yourFile.xlsx')
ws = wb['Sheet1']
initial_max_value = ws.max_row
while ws.max_row == inital_max_value:
THE
CODE
YOU
WANT TO WATCH
Else:
Print ('Max Value changed by ' + inital_max_value - ws.max_row
Related
I am trying to create an automatic numbering system with leading zeros in Python and openpyxl.
What is the best way to define the columns?
I would like to name them first and then say for each column what needs to be done.
Go to column 1 and put a numbering in it from 00001 to 00500.
Go to column 2 and put a numbering in there from 00501 to 01000.
...
In my opinion if I have these I can make any variants I want.
from openpyxl import Workbook, load_workbook
wb = Workbook()
ws = wb.active
ws.title = "Numbers"
ws.append(['N1','N2'])
#create Leading zero's
#zero_filled_number = number_str.zfill(5)
#print(zero_filled_number)
# Here I get stuck
for i in ws.append_columns(0)
i = range (1,500,1) number_str.zfill(5)
#ws.append_columns(1)
#for N2 in range (501,1000,1) number_str.zfill(5)
wb.save('Auto_numbers.xlsx')
from openpyxl import Workbook
import openpyxl
wb = Workbook()
sheet = wb.active
test_file = openpyxl.load_workbook('test.xlsx')
sheet = test_file.active
sheet['A1'] = 'ID'
counter = sheet.max_row
while counter < 10:
for row in sheet.rows:
counter += 1
sheet[f'A{counter}'] = f'N{counter}'
sheet.append([f'N{counter}'])
test_file.save('test.xlsx')
I'd like to read the values from column B in every worksheet within my workbook.
After a fair amount of reading and playing around I can return the cell names of the cells I want the values from, but I can't figure out how to get the values.
from openpyxl import load_workbook
wb = load_workbook(r"C:/Users/username/Documents/test.xlsx")
for sheet in wb.worksheets:
for row in range(2,sheet.max_row+1):
for column in "B":
cell_name = "{}{}".format(column, row)
print (cell_name)
This is returning the cell names (i.e. B2, B3) that have values in column B in every worksheet.
According to the documentation https://openpyxl.readthedocs.io/en/stable/usage.html you can access cell values as:
sheet['B5'].value
Replace B5 with the cell(s) you need.
import xlrd
loc = ("foo.xlsx") # excel file name
wb = xlrd.open_workbook(loc)
# sheet = wb.sheet_by_index(0)
for sheet in wb.sheets():
for i in range(sheet.nrows):
print(sheet.cell_value(i, 1))
Edit: I edited my answer to read all sheets in excel file.
just play with the range
from openpyxl import load_workbook
wb = load_workbook('')
for sheet in wb:
for i in range(1,50):
if sheet['B'+str(i)].value:
print(sheet['B'+str(i)].value)
Better one,
from openpyxl import load_workbook
wb = load_workbook('')
for sheet in wb:
for row in sheet['B']:
print(row.value)
I have a requirement where i need to compare excel to excel and create a third excel with True(where column value matches) and False(in case the match fails) using Python.
Can someone please assist with the piece of code with explanation.
Much appreciated, thanks in advance.
If you could please specify what tools you plan on using that would be great. We can accomplish the task in python using the openpyxl library.
Assuming that you are using python 3 with openpyxl, and your files are located in directory "C:\Users\Me\files" and are called "file1.xlsx" and "file2.xlsx":
import openpyxl
from openpyxl.utils import get_column_letter
path = 'C:\\Users\\Me\\files'
# open xcel sheets
wb1 = openpyxl.load_workbook(path + 'file1.xlsx')
ws1 = wb1.active
wb2 = openpyxl.load_workbook(path + 'file2.xlsx')
ws2 = wb2.active
# create new workbook
wb3 = openpyxl.Workbook()
ws3 = wb3.active
wb3.save(path + 'file3.xlsx')
# compare each element
for row in range(ws1.max_row):
for column in range(ws1.max_column):
column_letter = get_column_letter(column)
cell = column_letter + str(row)
if ws1[cell].value == ws2[cell].value:
ws3[cell].value = 'True'
else:
ws3[cell].value = 'False'
wb3.save(path + 'file3.xlsx')
My code is:
import openpyxl
wb = openpyxl.load_workbook('C:\\xampp\\htdocs\\dad_app\\template\\template.xlsm')
sheet = wb.get_active_sheet()
sheet = wb.active
sheet['A1:AP701'] = sheet['A1:AP701'].internal_value
But it saves the formula too.
How do I remove the formula and only get the output?
You can pass data_only=True as a parameter in load_workbook. It will return the value stored the last time Excel read the sheet.
Documentation: Here
wb = openpyxl.load_workbook('C:\\xampp\\htdocs\\dad_app\\template\\template.xlsm', data_only=True)
I want to read a xlsx file, change all the values less than say 0.0001 to 0.01. I can read the values and print them, but I can't change them ?
import pylab
from openpyxl import load_workbook
wb = load_workbook(filename = 'TF-Automation.xlsx', use_iterators=True)
ws = wb.get_sheet_by_name(name = 'Huvudmatris')
for row in ws.iter_rows():
for cell in row:
if cell.internal_value < 0.00001:
cell.set_value = 0.000001
print cell.internal_value
from the documentation : http://pythonhosted.org/openpyxl/api.html
openpyxl.reader.excel.load_workbook(filename,use_iterators=False)[source] :
Open the given filename and return the workbook
Parameters:
filename (string) – the path to open
use_iterators (bool) – use lazy load for cells
Return type:
openpyxl.workbook.Workbook
When using lazy load, all worksheets will be
openpyxl.reader.iter_worksheet.IterableWorksheet and the returned
workbook will be read-only.
don't use use_iterators=True . Also, if you need to call .save(filename) if you want to update the xlsx with your new values.