PyExcelerate
Accelerated Excel XLSX writing library for Python 2/3
- Current version: 0.6.1
- Authors: Kevin Wang and Kevin Zhang
- License: Simplified BSD License
- Source repository
- PyPI page
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Description
PyExcelerate is a Python 2/3 library for writing Excel-compatible XLSX spreadsheet files, with an emphasis on speed.
Benchmarks
Benchmark code located in pyexcelerate/tests/benchmark.py
Ubuntu 12.04 LTS, Core i5-3450, 8GB DDR3, Python 2.7.3
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, 2.4
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
Installation
pip install pyexcelerate
Usage
Writing bulk data
Fastest
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.
Fastest
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
Faster
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")
Fast
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.
Fastest
from pyexcelerate import Workbook, Color, Style, Font, Fill
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")
Faster
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")
Fast
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")
Note that .style.format.format
's repetition is due to planned support for conditional formatting and other related features. The formatting syntax may be improved in the future.
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.
Fastest
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")
Faster
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")
Fast
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
Fastest
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")
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-fit0
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")
Packaging with PyInstaller.
PyInstaller is the only packager officially supported by PyExcelerate. Copy hook-pyexcelerate.py to your PyInstaller hooks directory.
Support
Please use the GitHub Issue Tracker and pull request system to report bugs/issues and submit improvements/changes, respectively.
All changes to code must be accompanied by a test. We use the Nose testing framework.