`scipy.constants._codata:find`

source: /scipy/constants/_codata.py:2207

Signature

def find(sub: str | None = None, disp: bool = False) → Any

Summary

Return list of physical_constant keys containing a given string.

Parameters

sub : str: Sub-string to search keys for. By default, return all keys.
disp : bool: If True, print the keys that are found and return None. Otherwise, return the list of keys without printing anything.

Returns

keys : list or None: If disp is False, the list of keys is returned. Otherwise, None is returned.

Notes

Array API Standard Support

find is not in-scope for support of Python Array API Standard compatible backends other than NumPy.

See dev-arrayapi for more information.

Examples

from scipy.constants import find, physical_constants

✓

Which keys in the ``physical_constants`` dictionary contain 'boltzmann'?

find('boltzmann')

✗

['Boltzmann constant', 'Boltzmann constant in Hz/K', 'Boltzmann constant in eV/K', 'Boltzmann constant in inverse meter per kelvin', 'Stefan-Boltzmann constant']

Get the constant called 'Boltzmann constant in Hz/K':

physical_constants['Boltzmann constant in Hz/K']

✗

(20836619123.327576, 'Hz K^-1', 0.0)

Find constants with 'radius' in the key:

find('radius')
physical_constants['classical electron radius']

✗

(2.8179403205e-15, 'm', 1.3e-24)