sklearn warning error learning record

Warning

ConvergenceWarning:

• Which means max_iter WAS Reached at The coef_ DID not at The Converge
  "at The coef_ DID not Converge", ConvergenceWarning)
  the number of iterations is not enough, not convergence parameters, it set a reasonable convergence max_iter

FutureWarning:

• The default value of gamma will change from 'auto' to 'scale' in version 0.22 to account better for unscaled features. Set gamma explicitly to 'auto' or 'scale' to avoid this warning.
  Provided gamma i.e. the parameter kernel function coefficients to 'auto'

UndefinedMetricWarning:

• F-score is ill-defined and being set to 0.0 in labels with no true samples.
  需要显式的指定labels. 参考:F-score is ill-defined and being set to 0.0 in labels with no true samples.