Benchmarks

|          TEST_NAME          | NUM_ROWS | NUM_COLS | TIME_IN_SECONDS |
|-----------------------------|----------|----------|-----------------|
| pyexcelerate value fastest  |     1000 |      100 |            0.47 |
| pyexcelerate value faster   |     1000 |      100 |            0.51 |
| pyexcelerate value fast     |     1000 |      100 |            1.53 |
| xlsxwriter value            |     1000 |      100 |            0.84 |
| openpyxl                    |     1000 |      100 |            2.74 |
| pyexcelerate style cheating |     1000 |      100 |            1.23 |
| pyexcelerate style fastest  |     1000 |      100 |            2.40 |
| pyexcelerate style faster   |     1000 |      100 |            2.75 |
| pyexcelerate style fast     |     1000 |      100 |            6.15 |
| xlsxwriter style cheating   |     1000 |      100 |            1.21 |
| xlsxwriter style            |     1000 |      100 |            4.85 |
| openpyxl                    |     1000 |      100 |            6.32 |

 * cheating refers to pregeneration of styles

Writing bulk data

from pyexcelerate import Workbook

data = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] # data is a 2D array

wb = Workbook()
wb.new_sheet("sheet name", data=data)
wb.save("output.xlsx")

Writing bulk data to a range

PyExcelerate also permits you to write data to ranges directly, which is faster than writing cell-by-cell.

from pyexcelerate import Workbook

wb = Workbook()
ws = wb.new_sheet("test")
ws.range("B2", "C3").value = [[1, 2], [3, 4]]
wb.save("output.xlsx")

Writing cell data

from datetime import datetime
from pyexcelerate import Workbook

wb = Workbook()
ws = wb.new_sheet("sheet name")
ws.set_cell_value(1, 1, 15) # a number
ws.set_cell_value(1, 2, 20)
ws.set_cell_value(1, 3, "=SUM(A1,B1)") # a formula
ws.set_cell_value(1, 4, datetime.now()) # a date
wb.save("output.xlsx")

from datetime import datetime
from pyexcelerate import Workbook

wb = Workbook()
ws = wb.new_sheet("sheet name")
ws[1][1].value = 15 # a number
ws[1][2].value = 20
ws[1][3].value = "=SUM(A1,B1)" # a formula
ws[1][4].value = datetime.now() # a date
wb.save("output.xlsx")

Selecting cells by name

from pyexcelerate import Workbook

wb = Workbook()
ws = wb.new_sheet("sheet name")
ws.cell("A1").value = 12
wb.save("output.xlsx")

Merging cells

from pyexcelerate import Workbook

wb = Workbook()
ws = wb.new_sheet("sheet name")
ws[1][1].value = 15
ws.range("A1", "B1").merge()
wb.save("output.xlsx")

Styling cells

Styling cells causes non-negligible overhead. It will increase your execution time (up to 10x longer if done improperly!). Only style cells if absolutely necessary.

from pyexcelerate import Workbook, Color, Style, Font, Fill, Format
from datetime import datetime

wb = Workbook()
ws = wb.new_sheet("sheet name")
ws.set_cell_value(1, 1, 1)
ws.set_cell_style(1, 1, Style(font=Font(bold=True)))
ws.set_cell_style(1, 1, Style(font=Font(italic=True)))
ws.set_cell_style(1, 1, Style(font=Font(underline=True)))
ws.set_cell_style(1, 1, Style(font=Font(strikethrough=True)))
ws.set_cell_style(1, 1, Style(fill=Fill(background=Color(255,0,0,0))))
ws.set_cell_value(1, 2, datetime.now())
ws.set_cell_style(1, 1, Style(format=Format('mm/dd/yy')))
wb.save("output.xlsx")

from pyexcelerate import Workbook, Color
from datetime import datetime

wb = Workbook()
ws = wb.new_sheet("sheet name")
ws.set_cell_value(1, 1, 1)
ws.get_cell_style(1, 1).font.bold = True
ws.get_cell_style(1, 1).font.italic = True
ws.get_cell_style(1, 1).font.underline = True
ws.get_cell_style(1, 1).font.strikethrough = True
ws.get_cell_style(1, 1).fill.background = Color(0, 255, 0, 0)
ws.set_cell_value(1, 2, datetime.now())
ws.get_cell_style(1, 1).format.format = 'mm/dd/yy'
wb.save("output.xlsx")

from pyexcelerate import Workbook, Color
from datetime import datetime

wb = Workbook()
ws = wb.new_sheet("sheet name")
ws[1][1].value = 1
ws[1][1].style.font.bold = True
ws[1][1].style.font.italic = True
ws[1][1].style.font.underline = True
ws[1][1].style.font.strikethrough = True
ws[1][1].style.fill.background = Color(0, 255, 0, 0)
ws[1][2].value = datetime.now()
ws[1][2].style.format.format = 'mm/dd/yy'
wb.save("output.xlsx")

Styling ranges

from pyexcelerate import Workbook, Color
from datetime import datetime

wb = Workbook()
ws = wb.new_sheet("test")
ws.range("A1","C3").value = 1
ws.range("A1","C1").style.font.bold = True
ws.range("A2","C3").style.font.italic = True
ws.range("A3","C3").style.fill.background = Color(255, 0, 0, 0)
ws.range("C1","C3").style.font.strikethrough = True

Styling rows

A simpler (and faster) way to style an entire row.

from pyexcelerate import Workbook, Color, Style, Fill
from datetime import datetime

wb = Workbook()
ws = wb.new_sheet("sheet name")
ws.set_row_style(1, Style(fill=Fill(background=Color(255,0,0,0))))
wb.save("output.xlsx")

from pyexcelerate import Workbook, Color
from datetime import datetime

wb = Workbook()
ws = wb.new_sheet("sheet name")
ws.get_row_style(1).fill.background = Color(255, 0, 0)
wb.save("output.xlsx")

from pyexcelerate import Workbook, Color
from datetime import datetime

wb = Workbook()
ws = wb.new_sheet("sheet name")
ws[1].style.fill.background = Color(255, 0, 0)
wb.save("output.xlsx")

Styling columns

from pyexcelerate import Workbook, Color, Style, Fill
from datetime import datetime

wb = Workbook()
ws = wb.new_sheet("sheet name")
ws.set_col_style(1, Style(fill=Fill(background=Color(255,0,0,0))))
wb.save("output.xlsx")

Available style attributes

Consistent with the implementation patterns above, the following style parameters are available:

ws[1][1].style.font.bold = True
ws[1][1].style.font.italic = True
ws[1][1].style.font.underline = True
ws[1][1].style.font.strikethrough = True
ws[1][1].style.font.color = Color(255, 0, 255)
ws[1][1].style.fill.background = Color(0, 255, 0)
ws[1][1].style.alignment.vertical = 'top'
ws[1][1].style.alignment.horizontal = 'right'
ws[1][1].style.alignment.rotation = 90
ws[1][1].style.alignment.wrap_text = True
ws[1][1].style.borders.top.color = Color(255, 0, 0)
ws[1][1].style.borders.right.style = '-.'

Each attribute also has constructors for implementing via set_cell_style().

The following border styles are available: .-, ..-, --, .., =, ., medium -., medium -.., medium --, /-., _

Setting row heights and column widths

Row heights and column widths are set using the size attribute in Style. Appropriate values are: * -1 for auto-fit * 0 for hidden * Any other value for the appropriate size.

For example, to hide column B:

from pyexcelerate import Workbook, Color, Style, Fill
from datetime import datetime

wb = Workbook()
ws = wb.new_sheet("sheet name")
ws.set_col_style(2, Style(size=0))
wb.save("output.xlsx")

Linked styles

PyExcelerate supports using style objects instead manually setting each attribute as well. This permits you to modify the style at a later time.

from pyexcelerate import Workbook, Font

wb = Workbook()
ws = wb.new_sheet("sheet name")
ws[1][1].value = 1
font = Font(bold=True, italic=True, underline=True, strikethrough=True)
ws[1][1].style.font = font
wb.save("output.xlsx")

Hidden sheet

PyExcelerate supports adding hidden sheets. Note that the first sheet cannot be hidden.

from pyexcelerate import Workbook

wb = Workbook()
ws = wb.new_sheet("visible sheet")
ws = wb.new_sheet("hidden sheet", hidden=True)
wb.save("output.xlsx")