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| class Float(object):
__slots__=('mult','val','sf','dec')
def __init__(self,value=0.0,mult=None,sf=None,d=None):
if type(value)not in (float,int): raise
if mult==None:
if type(value)==float:
if 'e-' in str(value):
self.mult=int('1'+'0'*(int(str(value).split('e-')[-1])+len(str(value).split('e-')[0].split('.')[-1])))
self.val=int(str(value).split('e-')[0].replace('.',''))
else:
self.mult=10**len(str(value).split('.')[-1])
self.val=int(str(value).replace('.',''))
else:
self.mult=1
self.val=value
else:
if mult!= 1 and mult%10!=0 or type(value)!=int:raise
self.mult=mult
self.val=value
if sf==None:
if self.val<0:
self.sf=1
self.val=abs(self.val)
else: self.sf=0
else:
if self.val<0:
self.sf=1
self.val=abs(self.val)
else: self.sf=sf
self.dec=d if type(d)==int and d >0 else None
def __repr__(self):
return '%s( %i / %s )<Float>'%('-' if self.sf==1 else '+',self.val,'1e'+str(str(self.mult).count('0')))
def __add__(self,other):
if type(other)!=float:
other=float(other)
val=float(self)+other
return Float(val,d=self.dec)
def __radd__(self,other):
return other.__add__(self)
def __sub__(self,other):
if type(other)!=float:
other=float(other)
val=float(self)-other
return Float(val,d=self.dec)
def __rsub__(self,other):
if type(other)!=float:
other=float(other)
return other.__sub__(self)
def __mul__(self, other):
if type(other) in (float,int):
other=Float(other)
if other.__class__==Float().__class__:
sf=self.sf^other.sf
val=self.val*other.val
mu=self.mult*other.mult
return Float(val,mu,sf,d=self.dec)
else: raise
def __rmul__(self,other):
if type(other) in (float,int):
other=Float(other)
return other.__mul__(self)
def __floordiv__(self,other):
if type(other) in (float,int):
other=Float(other)
if other.__class__==Float().__class__:
sf=self.sf^other.sf
val=(self.val*other.mult)/(other.val*self.mult)
return Float(val,sf=sf,d=self.dec)
else: raise
def __div__(self,other):
if type(other) in (float,int):
other=Float(other)
if other.__class__==Float().__class__:
sf=self.sf^other.sf
val=(float(self.val)*other.mult)/(other.val*self.mult)
return Float(val,sf=sf,d=self.dec)
else:raise
def __truediv__(self,other):
return self.__div__(other)
def __rdiv__(self,other):
if type(other) in (float,int):
other=Float(other)
if other.__class__==Float().__class__:
return other.__div__(self)
else:raise
def __mod__(self,other):
val=float(self.__str__())%(float(other.__str__()) if other.__class__==Float().__class__ else other)
return Float(val,d=self.dec)
def __rmod__(self,other):
if type(other) in (float,int):
other=Float(other)
return other.__mod__(Float(self.val,self.mult,self.sf))
def __divmod__(self,other):
if type(other) in (float,int):
other=Float(other)
return (self.__floordiv__(other),self.__mod__(other))
def __rdivmod__(self,other):
if type(other) in (float,int):
other=Float(other)
return (other.__floordiv__(self),other.__mod__(self))
def __pow__(self,other):
if type(other) in (float,int):
other=Float(other)
if other.__class__==Float().__class__:
return Float(float(self)**float(other),d=self.dec)
def __rpow__(self,other):
if type(other) in (float,int):
other=Float(other)
if other.__class__==Float().__class__:
return Float(float(other)**float(self),d=other.dec)
def round(self,integer):
val=('-'if self.sf==1 else '')+str(float(self.val)/self.mult)
if '-' in val: val=val.replace('-','')
if 'e' not in val:
entier=val.split('.')[0]
_float=val.split('.')[1]
else:
entier='0'
_float,dec=val.split('e')[0],int(val.split('e')[-1])
_float=_float.split('.')[0].rjust(dec,'0')+_float.split('.')[-1]
if 10-int(_float[integer])>5:
val=_float[:integer]
else:
val=str(int(_float[:integer])+1)
if len(val)>integer:
entier,val=str(int(entier)+1),val[1:]
mult=int('1'+'0'*integer)
return Float(int(entier+val),mult,self.sf)
def n_dec(self,integer):
if type(integer)!=int: raise
if integer<str(self.mult).count('0'):
return self.round(integer)
elif integer>str(self.mult).count('0'):
add='0'*(integer-str(self.mult).count('0'))
mult=str(self.mult)+add
val=str(self.val)+add
return Float(int(val),int(mult),self.sf)
else: return Float(self.val,self.mult,self.sf)
def __str__(self):
r=self.n_dec(self.dec)if self.dec!=None else self
dec=str(r.mult).count('0')
val=str(r.val)
if len(val)<= dec:
if dec-len(val)>8:
val=('-' if r.sf==1 else '')+val[0]+'.'+val[1:]+'e-'+str((dec-len(val[1:])))
else:
val=('-' if r.sf==1 else '')+'0.'+val.rjust(dec,'0')
else:
val=('-' if self.sf==1 else '')+(val[:dec*-1]+'.'+val[dec*-1:] if dec!=0 else val)
return val
def __nonzero__(self):
return (self.sf==1 and [0] or [1])[0]
def __float__(self):
return float(self.__str__())
def __int__(self):
return int(self.__float__())
def __long__(self):
return long(self.__float__())
def __complex__(self):
return complex(self.__float__())
def __neg__(self):
return Float(self.val,self.mult,(1 if self.sf==0 else 0))
def __pos__(self):
return self
def __abs__(self):
return Float(self.val,self.mult)
def __gt__(self,other):
if type(other) in (float,int):
other=Float(other)
if other.__class__==Float().__class__:
return True if self.__float__()>other.__float__() else False
def __ge__(self,other):
if type(other) in (float,int):
other=Float(other)
if other.__class__==Float().__class__:
return True if self.__float__()>=other.__float__() else False
def __eq__(self,other):
if type(other) in (float,int):
other=Float(other)
if other.__class__==Float().__class__:
return True if self.__float__()==other.__float__() else False
def __ne__(self,other):
if type(other) in (float,int):
other=Float(other)
if other.__class__==Float().__class__:
return True if self.__float__()!=other.__float__() else False
def __lt__(self,other):
if type(other) in (float,int):
other=Float(other)
if other.__class__==Float().__class__:
return True if self.__float__()<other.__float__() else False
def __le__(self,other):
if type(other) in (float,int):
other=Float(other)
if other.__class__==Float().__class__:
return True if self.__float__()<=other.__float__() else False |
Float arrondi à n décimales
Répondre avec citation
.
Pourtant j'était sur que sa fonctionne...
, mais peut se révéler assez embêtante suivant ce que l'on veut faire : par exemple stocker le resultat du Round() dans une variable et plus tard ajouter un int ou un float à cette dernière.
...
.
: l'objet ne contient plus que deux attributs : val (le float) et d (le nombre de décimales à afficher si >0) :
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