Erreur lors de l'appel d'une classe faite en python

Question

J'ai créé une classe appelée erreurs dans laquelle j'essaie de faire quelques analyses d'erreurs. Je continue à obtenir le code d'erreur:

TypeError: unbound method just_print() must be called with errors instance as first argument (got ndarray instance instead)

je suis en train d'utiliser la méthode de just_print pour utiliser juste imprimer le résultat au module interpréteur en le faisant passer les deux tableaux x, y au fil des années et temps .

Merci pour toute aide: D

mon code d'origine est al suit:

#imports 
from pylab import * 
#defining error class 
class errors(object): 
    #creates class object 
    def __init__(self): 
     pass 
    #error method 
    def just_print(x,y): # defining error method 
     #error analysis 
     n = len(x) #length of the x data 
     D = sum(x**2) - 1./n * sum(x)**2 # d is the sum of the squares minus the sum squared over n 
     x_bar = mean(x) # average all x values 
     p_coeff, residuals, _, _, _ = polyfit(x, y, 1, full=True) #using only the first 2 results from the poly fit returned values 

     dm_squared = 1./(n-2)*residuals/D # error squared using standard forula 
     dc_squared = 1./(n-2)*(D/n + x_bar**2)*residuals/D #error squared using standard forula 

     dm = sqrt(dm_squared) # rooted squared error 
     dc = sqrt(dc_squared) # rooted squared error 

     #printing results 
     print("The value for gradient is") 
     print("%.3g" % p_coeff[0] , "error:" , "%.3g" % dm) 
     print("The value for intercept is") 
     print("%.3g" % p_coeff[1] , "error:" , "%.3g" % dc) 
    return; 


#reading in data from data file called wales_temp.txt 
f = open("wales_temp.txt") 
temps = loadtxt(f, skiprows=8)#skips thw first 8 rows as they are information aboutthe data 
f.close() 
years = linspace(1911,2012,(2012 - 1911 + 1), dtype=int)#set the years array of euqal length such that each corrosponds to the temp 

print("The max temprature for the lest 100 years was " , "%.3g" % max(temps) , " Celcius in " , years[argmax(temps)]) 
print("The min temprature for the lest 100 years was " , "%.3g" % min(temps) , " Celcius in " , years[argmin(temps)]) 

print("The standard deviation of the tempratures over the past 100 years is : " , "%.3g" % std(temps)) 

years1990 = linspace(1990,2012,(2012 - 1990 + 1), dtype=int) 
temps1990 = temps[-len(years1990):] 
temps1990_9degs = temps1990[9<temps1990] 
percent = (float(len(temps1990_9degs)))/(float(len(temps[9<temps]))) 

print("The percantage of years with tempratures above 9 degrees after 1990 compared to all the years is : " , (100*percent) , "%") 

hist(temps, bins=len(years)) 
hist(temps1990 , bins = len(years)) 
figure("avg temps") 
plot(years, temps, "bx") 
best_fit = poly1d(polyfit(years,temps,1)) 
plot(years,best_fit(years)) 

test = errors 
test.just_print(years, temps) 

Answer 1

Vous liez d'accès test.just_print(years, temps) où test n'est pas une instance de la classe, s'il vous plaît créer un objet.

Vous devez déclarer just_print la méthode staticmethod ou modifier sa signature en tant que def just_print(self, x,y): et appeler avec instance.

test = errors() 
test.just_print(years, temps)