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scipy.constants.

# value

scipy.constants.value(key)

  Value in physical_constants indexed by key

  Parameters:
    keyPython string

      Key in dictionary `physical_constants`

  Returns:
    valuefloat

      Value in `physical_constants` corresponding to key

  Examples

      >>> from scipy import constants
      >>> constants.value('elementary charge')
      1.602176634e-19