---
name: "pymca"
section: "1"
platform: "linux"
package: "pymca"
version: "5.9.4-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/pymca"
---

# pymca(1)

PyMca X-Ray Fluorescence Toolkit main application

## NAME

pymca - PyMca X-Ray Fluorescence Toolkit main application

## SYNOPSIS

pymca \[OPTION\]... \[FILE\]

## DESCRIPTION

Start the graphical user interface of the PyMca X-Ray  Fluorescence Toolkit main window using latest user defined default settings.

If FILE is given, it will be opened in the program provided  its format is supported.

**-f** bypass user defined default settings

## EXAMPLES

**pymca -f**

Start the program bypassing user defined default settings.

**pymca -f LShellConstants.dat**

Open the LShellConstants.dat and list its contents in the source browser.

**pymca -f your\_HDF5\_file.h5**

Allows one to browse the HDF5 file your\_HDF5\_file.h5 in PyMca if the Python module h5py is installed.

**pymca --nativefiledialogs=X**

With X set to 1, the program will use the file dialogs from the operating system. With X set to 0, the program will use Qt file dialogs.

**pymca --backend=XX**

Start the program using the selected graphics backend (mpl for matplotlib, gl for OpenGL, silx for silx library)

**pymca --binding=XX**

Start the program using the selected Qt binding. It has to be one of PyQt5 (default), PyQt6, PySide6 or PySide2. i **pymca --logging=XX**

Set the logging level. Allowed values are, in increasing order of verbosity: critical, error, warning (default), info, debug. Alternatively, you can specify an integer in range 0 (critical) to 4 (debug).

## SEE ALSO

HDF5, h5py