xlwings – Make Excel Fly with Python

•

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xlwings is an open-source Python package that connects Excel with Python on Windows and Mac. It allows for interactive use from IPython Notebooks or any other Python environment but also allows to run Python code from Excel as replacement for VBA macros. The talk will give an overview of the current Excel/Python landscape, show the characteristics of the xlwings package and include a live demo to show how easy the usage is. The demo will also include examples of tasks that would otherwise be difficult to do with Excel only as well as more real world tools built with Python where Excel merely acts as a user interface/frontend.

Technologie

O P E N
D A T A
S C I E N C E
C O N F E R E N C E_
BOSTON 2015
@opendatasci
xlwings Felix Zumstein

About me
•  Startup (2014, Zurich):
– Mainly Python for Finance
– Web based trading solutions
(Interactive Brokers)
– Lots of Excel
– Open-source: xlwings/ExcelPython
•  Previously: 9yrs in Banking /Asset Mgmt
•  Background in Finance & Economics
2

The open-source Python/Excel Landscape
4
•  Pywin32
•  xlwings
•  ExcelPython
Read/Write Program/Interact
•  xlwt/xlrd
•  XlsxWriter
•  OpenPyxl

(1) Installation
6
•  pip/conda install xlwings
•  or equally easy:

(3) Flexibility
8
Version
2.6
2.7
3.1
3.2
3.3
3.4
32-bit
64-bit
32-bit
64-bit
2003
2010
2011 (Mac)
2013
2016 (Win + Mac*)
ArchitectureVersion Architecture
*under development

(4) Simplicity
9
>>>
from
xlwings
import
Workbook,
Range

>>>
wb
=
Workbook()

>>>
Range("A1").value
=
my_variable

•  Strings
•  Numbers
•  DateTime
•  Lists (nested)
•  NumPy arrays
•  Pandas DataFrames
•  Blaze Data container (planned)

(5) Works back and forth
10
>>>
wb
=
Workbook()

>>>
Range("A1").value
=
my_variable

Sub
MyFunction()

RunPython
("import
mymodule;mymodule.myfunction()")

End
Sub

$(6) ExcelPython for UDFs (Windows only) 11 from xlpython import xlfunc import numpy as np @xlfunc def matrix_mult(x, y): x = np.atleast_2d(np.array(x)) y = np.atleast_2d(np.array(y)) return x.dot(y) {=matrix_mult(A1:B2,D1:E2)} Access from Excel via Array Formula: Write User Deﬁned Functions in Python:$

What’s next?
•  Add-in
•  Full integration of xlwings/ExcelPython
•  Add more features: matplotlib etc.
•  Someday…
– Google Sheets
– LibreOﬃce/OpenOﬃce
13

julia>
using
PyCall

julia>
@pyimport
xlwings
as
xw

julia>
xw.Workbook()

julia>
xw.Range("A1",
asarray=true)[:table][:value]

Use xlwings from Julia
14
>>>
from
xlwings
import
Workbook,
Range

>>>
wb
=
Workbook()

>>>
Range("A1",
asarray=True).table.value

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xlwings – Make Excel Fly with Python

1. O P E N D A T A S C I E N C E C O N F E R E N C E_ BOSTON 2015 @opendatasci xlwings Felix Zumstein

2. About me •  Startup (2014, Zurich): – Mainly Python for Finance – Web based trading solutions (Interactive Brokers) – Lots of Excel – Open-source: xlwings/ExcelPython •  Previously: 9yrs in Banking /Asset Mgmt •  Background in Finance & Economics 2

3. What’s in this talk? 3

4. The open-source Python/Excel Landscape 4 •  Pywin32 •  xlwings •  ExcelPython Read/Write Program/Interact •  xlwt/xlrd •  XlsxWriter •  OpenPyxl

5. Why xlwings? – 6 Reasons 5

6. (1) Installation 6 •  pip/conda install xlwings •  or equally easy:

7. (2) Cross-Platform 7 +

8. (3) Flexibility 8 Version 2.6 2.7 3.1 3.2 3.3 3.4 32-bit 64-bit 32-bit 64-bit 2003 2010 2011 (Mac) 2013 2016 (Win + Mac*) ArchitectureVersion Architecture *under development

9. (4) Simplicity 9 >>> from xlwings import Workbook, Range >>> wb = Workbook() >>> Range("A1").value = my_variable •  Strings •  Numbers •  DateTime •  Lists (nested) •  NumPy arrays •  Pandas DataFrames •  Blaze Data container (planned)

10. (5) Works back and forth 10 >>> wb = Workbook() >>> Range("A1").value = my_variable Sub MyFunction() RunPython ("import mymodule;mymodule.myfunction()") End Sub

11. (6) ExcelPython for UDFs (Windows only) 11 from xlpython import xlfunc import numpy as np @xlfunc def matrix_mult(x, y): x = np.atleast_2d(np.array(x)) y = np.atleast_2d(np.array(y)) return x.dot(y) {=matrix_mult(A1:B2,D1:E2)} Access from Excel via Array Formula: Write User Deﬁned Functions in Python:

12. What’s next? 12

13. What’s next? •  Add-in •  Full integration of xlwings/ExcelPython •  Add more features: matplotlib etc. •  Someday… – Google Sheets – LibreOﬃce/OpenOﬃce 13

14. julia> using PyCall julia> @pyimport xlwings as xw julia> xw.Workbook() julia> xw.Range("A1", asarray=true)[:table][:value] Use xlwings from Julia 14 >>> from xlwings import Workbook, Range >>> wb = Workbook() >>> Range("A1", asarray=True).table.value

15. DEMO xlwings.org 15

xlwings – Make Excel Fly with Python

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