lmfit extract fit statistics parameters after fitting I looked at code (github com lmfit lmfit-py blob master lmfit printfuncs py) of fit_report () and was able to see how it was getting all those parameters Alternatively, you can use dir (result) to see all the attributes
Parameter and Parameters — Non-Linear Least-Squares Minimization and . . . This chapter describes Parameter objects which is the key concept of lmfit A Parameter is the quantity to be optimized in all minimization problems, replacing the plain floating point number used in the optimization routines from scipy optimize