Guides
Convert VBA to Python Safely
Migrating legacy macros isn't just about syntax — it's about preserving business logic. These guides cover how to move from fragile VBA to reviewable, deterministic Python without relying on AI guesswork.
Featured Guides
VBA to Python Syntax Mapping
Complete side-by-side reference for data types, operators, control flow, functions, and Excel objects.
Read guide →Excel VBA to Python
Range, Cells, and worksheet operations mapped to openpyxl with a library comparison table.
Read guide →How to Convert VBA to Python
Complete step-by-step migration process: Audit, Extract, Convert, Test, Deploy. With checklist and common pitfalls.
Read guide →Comparisons
Can ChatGPT Convert VBA to Python?
Honest comparison: when ChatGPT hallucinates vs when a deterministic converter gets it right. Real code examples included.
Read comparison →How Much VBA Actually Converts?
We benchmarked 383 real-world VBA files and published the pass rate, the failure buckets, and the method.
Read comparison →Syntax & Patterns
15 VBA vs Python Examples
Side-by-side code for the 15 most common patterns
View guide →String Functions
Trim, Left, Mid, InStr, Replace
View guide →Loops
For, For Each, Do While, Do Until
View guide →Dictionary to Dict
Scripting.Dictionary methods
View guide →Select Case
Select Case to if/elif and match statements
View guide →Collections
VBA Collection to Python lists and dicts
View guide →Date Functions
DateAdd, DateDiff, Format to datetime
View guide →Regex
VBScript.RegExp to Python re module
View guide →File I/O
Open, Print #, FileSystemObject to pathlib
View guide →Excel Macro to Python Script
Extract, convert, and run a macro standalone
View guide →Migration Challenges
GoTo & Error Handling
On Error, GoTo, try/except refactoring
View guide →Arrays & ReDim
Static arrays, dynamic arrays, 0-vs-1 indexing
View guide →ReDim 0 to -1 Error
Why bounds collapse and the fix
View guide →ReDim Preserve Uninitialized
The (Not arr) guard and Python list equivalent
View guide →Conversion Difficulty
What converts automatically vs. needs manual work
View guide →Error Handling
On Error Resume Next, Err object, try/except
View guide →Class Modules
Property Get/Let/Set to Python classes
View guide →UserForms
UserForm dialogs to tkinter and alternatives
View guide →