1. Overview
  2. Post-processing
  3. Data Post-processing

Data Post-processing

Parsio offers two ways to modify parsed data: using Field formatters (no-code) or by writing a Python script (read below).

The Post-processing step allows you to modify parsed data before exporting it to webhooks, Zapier etc. Write Python code to add custom formatting and business logic: merge or split fields, format dates, prevent some documents from being exported and much more.

Writing post-processing code

Before writing the Python code, you should have a basic knowledge of Python and its syntax to use this feature efficiently. Don't hesitate to contact our support if you need any help.

Some popular use cases:

  • Normalize fields format.
  • Format data to make an API call without passing by an automated platform (Zapier/Make/Pabbly Connect etc.).
  • Create, modify, split, merge or remove some fields.
  • Add additional business logic.
  • Avoid exporting some documents based on certain condition.
The parsed data is stored in the data dictionary.

Post-processing in Action

In this video, we'll show you how to use the Post-processing step to filter queries coming in emails from the HARO platform.

Writing Python Code

Available Python libraries

The following Python libraries are available (you don't need to import them):

re Regular expression operations.

Module provides support for fast correctly rounded decimal floating point arithmetic.

datetime Module supplies classes for manipulating dates and times.
dateparser Provides modules to easily parse localized dates in almost any string formats commonly found on web pages.

Python built-in functions

Many Python built-in functions are supported. Here are some of the most useful functions:

str(42.99) Returns a string object
int("42") Returns an integer number
float("42.99") Returns a floating point number
range(0, 4) Returns a sequence of numbers, starting from 0 and increments by 1 (by default)
len("hello") Returns the length of an object
abs(-42.99) Returns the absolute value of a number
max([1, -4]) Returns the largest item in an iterable
min([1, -4]) Returns the smallest item in an iterable
pow(x, y) Returns the value of x to the power of y
filter(function, iterable) Construct an iterator from those elements of iterable for which function returns true. 

Please refer to the official documentation to learn more.

Python string methods

Here are some of the most useful string methods:

"hello".upper() Converts a string into upper case
"HELLO".lower() Converts a string into lower case
"hello".capitalize() Converts the first character to upper case
"hello".endswith('o') Returns true if the string ends with the specified value
"hello".startswith('h') Returns true if the string starts with the specified value
"  hello  ".strip() Removes spaces at the beginning and at the end of the string
"hello world".title() Converts the first character of each word to upper case
"hELLO".swapcase() Swaps cases, lower case becomes upper case and vice versa
"hello world".split(" ") Splits the string at the specified separator, and returns a list
"hello world".replace("hello", "bye") Returns a string where a specified value is replaced with a specified value
"42".isdigit() Returns True if all characters in the string are digits
"hello".isalpha() Returns True if all characters in the string are in the alphabet
"hello42".isalnum() Returns True if all characters in the string are alphanumeric

Please refer to the official documentation to learn more.


For reasons of security and simplicity, we use a restricted version of Python. Here are some unsupported features:

  • import of additional Python packages
  • while loops
  • print function
  • variables starting with underscore: _foo = 42
  • Python classes


Our code editor supports the following hotkeys:

  • Ctrl+S: run and save
  • Ctrl+/: comment out
  • Ctrl+X: delete line
  • Tab, Shift+Tab: indent and outdent
  • Ctrl+Z, Ctrl+Shift+Z: undo and redo
  • Ctrl+F: search

Mac users: use the Cmd button instead of Ctrl.

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