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# `fit`: Fitting tools

- `leastsq`: Levenberg Marquardt with constraints
- Peak search function
- Fit functions
- Smoothing and background filters
- `fitmanager`: Fit functions manager
- `fittheory`: Fit theory definition
- `fittheories`: Fit theories for `fitmanager`
- `bgtheories`: Background theories for `fitmanager`

For a graphical fit widget, see `silx.gui.fit.FitWidget`.

For a tutorial on using the various fit related modules, see Best fit tools .