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Parser for mwtab files from the Metabolomics Workbench

Project description

License information Current library version Supported Python versions Documentation status Travis CI status Code coverage information Citation link GitHub project

The mwtab package is a Python library that facilitates reading and writing files in mwTab format used by the Metabolomics Workbench for archival of Mass Spectrometry (MS) and Nuclear Magnetic Resonance (NMR) experimental data.

The mwtab package provides facilities to convert mwTab formatted files into their equivalent JSON ized representation and vice versa. JSON stands for JavaScript Object Notation, an open-standard format that uses human-readable text to transmit data objects consisting of attribute-value pairs.

The mwtab package can be used in several ways:

  • As a library for accessing and manipulating data stored in mwTab format files.
  • As a command-line tool to convert between mwTab format and its equivalent JSON representation.


When using mwtab package in published work, please cite the following papers:

  • Powell, Christian D., and Hunter NB Moseley. “The mwtab Python Library for RESTful Access and Enhanced Quality Control, Deposition, and Curation of the Metabolomics Workbench Data Repository.” Metabolites 11.3 (2021): 163. doi: 10.3390/metabo11030163.
  • Smelter, Andrey and Hunter NB Moseley. “A Python library for FAIRer access and deposition to the Metabolomics Workbench Data Repository.” Metabolomics 2018, 14(5): 64. doi: 10.1007/s11306-018-1356-6.


The mwtab package runs under Python 3.4+. Use pip to install. Starting with Python 3.4, pip is included by default.

Install on Linux, Mac OS X

python3 -m pip install mwtab

Install on Windows

py -3 -m pip install mwtab

Upgrade on Linux, Mac OS X

python3 -m pip install mwtab --upgrade

Upgrade on Windows

py -3 -m pip install mwtab --upgrade


>>> import mwtab
>>> # Here we use ANALYSIS_ID of file to fetch data from URL
>>> for mwfile in mwtab.read_files("1", "2"):
...      print("STUDY_ID:", mwfile.study_id)
...      print("ANALYSIS_ID:", mwfile.analysis_id)
...      print("SOURCE:", mwfile.source)
...      print("Blocks:", list(mwfile.keys()))


Read the User Guide and the mwtab Tutorial on ReadTheDocs to learn more and to see code examples on using the mwtab as a library and as a command-line tool.


This package is distributed under the BSD license.

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