Esercizi stilistici in Python
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trace.py:
#!/usr/bin/env python3
def trace(f):
def strtuple(x):
return "("+str(x[0])+")" if len(x)==1 else str(x)
def g(*x):
print('| ' * trace.indent + '/-- ', f.__name__, strtuple(x), sep='')
trace.indent += 1
value = f(*x)
trace.indent -= 1
print('| ' * trace.indent + '\-- ', 'return', repr(value))
return value
return g
trace.indent=0
def memoize(f):
cache = {}
def g(*x):
if x not in cache:
cache[x] = f(*x)
return cache[x]
return g
istr2num:
#!/usr/bin/env python3
#
# istr2num.py
#
# multi language string 2 number conversion
#
# Copyright 2014 Renzo Davoli University of Bologna - Italy
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
import sys
class num:
def __init__(self,n):
self.val=n
class mul(num):
pass
class onemul(mul):
pass
class plus():
pass
class times():
pass
class numlanguage():
def __init__(self):
self.dict={}
def __setitem__(self,s,op):
self.dict[s]=op
for l in range(len(s)-1,0,-1):
if s[:l] in self.dict:
break
else:
self.dict[s[:l]]=None
return op
def match(self,s):
matchlen,obj=0,None
for l in range(1,len(s)+1):
if s[:l] not in self.dict:
break
else:
matchedobj=self.dict[s[:l]]
if matchedobj:
matchlen,obj=l,matchedobj
return matchlen,obj
def str2num(langnum,s):
hi=lo=last=0
lastop=None
while s:
if s[0] in " -\t\n":
s=s[1:]
else:
ml,obj=langnum.match(s)
if obj:
if isinstance(obj,num):
if isinstance(obj,mul):
if isinstance(obj,onemul) and lo == 0:
lo = 1
if (last <= obj.val or isinstance(lastop,times)) and not isinstance(lastop,plus):
hi,lo = (hi+lo)*obj.val,0
else:
hi,lo = hi+lo*obj.val,0
last=obj.val
else:
if obj.val <= lo or isinstance(lastop,plus):
lo += obj.val
else:
lo = lo*obj.val if lo else obj.val
lastop=None
else:
lastop=obj
# print(s[:ml],hi,lo,last,lastop)
s=s[ml:]
else:
return -1
def num_it():
nl=numlanguage()
nl["zero"]=num(0)
nl["uno"]=nl["un"]=nl["una"]=num(1)
nl["due"]=num(2)
nl["tre"]=num(3)
nl["quattro"]=num(4)
nl["cinque"]=num(5)
nl["sei"]=num(6)
nl["sette"]=num(7)
nl["otto"]=num(8)
nl["nove"]=num(9)
nl["dieci"]=num(10)
nl["undici"]=num(11)
nl["dodici"]=num(12)
nl["tredici"]=num(13)
nl["quattordici"]=num(14)
nl["quindici"]=num(15)
nl["sedici"]=num(16)
nl["diciassette"]=num(17)
nl["diciotto"]=num(18)
nl["diciannove"]=num(19)
nl["venti"]=nl["vent"]=num(20)
nl["trenta"]=nl["trent"]=num(30)
nl["quaranta"]=nl["quarant"]=num(40)
nl["cinquanta"]=nl["cinquant"]=num(50)
nl["sessanta"]=nl["sessant"]=num(60)
nl["settanta"]=nl["settant"]=num(70)
nl["ottanta"]=nl["ottant"]=num(80)
nl["novanta"]=nl["novant"]=num(90)
nl["cento"]=num(100)
nl["mille"]=onemul(10**3)
nl["mila"]=nl["migliaia"]=mul(10**3)
nl["milioni"]=nl["milione"]=mul(10**6)
nl["miliardi"]=nl["miliardo"]=mul(10**9)
nl["dozzine"]=nl["dozzina"]=mul(12)
nl["decine"]=mul(10)
nl["centinaia"]=mul(100)
nl["di"]=times()
nl["e"]=plus()
return nl
def num_en():
nl=numlanguage()
nl["zero"]=nl["null"]=num(0)
nl["one"]=num(1)
nl["two"]=num(2)
nl["three"]=num(3)
nl["four"]=num(4)
nl["five"]=num(5)
nl["six"]=num(6)
nl["seven"]=num(7)
nl["eight"]=num(8)
nl["nine"]=num(9)
nl["ten"]=num(10)
nl["eleven"]=num(11)
nl["twelve"]=num(12)
nl["thirteen"]=num(13)
nl["fourteen"]=num(14)
nl["fifteen"]=num(15)
nl["sixteen"]=num(16)
nl["seventeen"]=num(17)
nl["eighteen"]=num(18)
nl["nineteen"]=num(19)
nl["twenty"]=num(20)
nl["thirty"]=num(30)
nl["forty"]=num(40)
nl["fifty"]=num(50)
nl["sixty"]=num(60)
nl["seventy"]=num(70)
nl["eighty"]=num(80)
nl["ninety"]=num(90)
nl["hundred"]=num(100)
nl["thousand"]=mul(10**3)
nl["million"]=mul(10**6)
nl["billion"]=mul(10**9)
nl["trillion"]=mul(10**12)
nl["dozen"]=mul(12)
nl["and"]=plus()
nl["of"]=times()
return nl
def num_fr():
nl=numlanguage()
nl["zero"]=num(0)
nl["un"]=num(1)
nl["deux"]=num(2)
nl["trois"]=num(3)
nl["quatre"]=num(4)
nl["cinq"]=num(5)
nl["six"]=num(6)
nl["sept"]=num(7)
nl["huit"]=num(8)
nl["neuf"]=num(9)
nl["dix"]=num(10)
nl["onze"]=num(11)
nl["douze"]=num(12)
nl["treize"]=num(13)
nl["quatorze"]=num(14)
nl["quinze"]=num(15)
nl["seize"]=num(16)
nl["vingt"]=num(20)
nl["trente"]=num(30)
nl["quarante"]=num(40)
nl["cinquante"]=num(50)
nl["soixante"]=num(60)
nl["cent"]=num(100)
nl["mille"]=onemul(10**3)
nl["million"]=mul(10**6)
nl["milliard"]=mul(10**9)
nl["douzaine"]=mul(12)
nl["et"]=plus()
nl["de"]=times()
return nl
def num_de():
nl=numlanguage()
nl["null"]=num(0)
nl["eins"]=nl["ein"]=num(1)
nl["zwei"]=nl["zwo"]=num(2)
nl["drei"]=num(3)
nl["vier"]=num(4)
nl["fünf"]=num(5)
nl["sechs"]=num(6)
nl["sieben"]=num(7)
nl["acht"]=num(8)
nl["neun"]=num(9)
nl["zehn"]=num(10)
nl["elf"]=num(11)
nl["zwölf"]=num(12)
nl["dreizehn"]=num(13)
nl["vierzehn"]=num(14)
nl["fünfzehn"]=num(15)
nl["sechzehn"]=num(16)
nl["siebzehn"]=num(17)
nl["achtzehn"]=num(18)
nl["neunzehn"]=num(19)
nl["zwanzig"]=num(20)
nl["dreiβig"]=num(30)
nl["dreißig"]=num(30)
nl["vierzig"]=num(40)
nl["fünfzig"]=num(50)
nl["sechzig"]=num(60)
nl["siebzig"]=num(70)
nl["achtzig"]=num(80)
nl["neunzig"]=num(90)
nl["hundert"]=num(100)
nl["tausend"]=mul(10**3)
nl["million"]=mul(10**6)
nl["milliard"]=mul(10**9)
nl["und"]=plus()
return nl
def num_es():
nl=numlanguage()
nl["cero"]=num(0)
nl["uno"]=num(1)
nl["dos"]=num(2)
nl["tres"]=num(3)
nl["cuatro"]=num(4)
nl["cinco"]=num(5)
nl["seis"]=num(6)
nl["siete"]=num(7)
nl["ocho"]=num(8)
nl["nueve"]=num(9)
nl["diez"]=num(10)
nl["once"]=num(11)
nl["doce"]=num(12)
nl["trece"]=num(13)
nl["catorce"]=num(14)
nl["quince"]=num(15)
nl["dieciséis"]=num(16)
nl["diecisiete"]=num(17)
nl["dieciocho"]=num(18)
nl["diecinueve"]=num(19)
nl["veinte"]=nl["veinti"]=num(20)
nl["treinta"]=num(30)
nl["cuarenta"]=num(40)
nl["cincuenta"]=num(50)
nl["sesenta"]=num(60)
nl["setenta"]=num(70)
nl["ochenta"]=num(80)
nl["noventa"]=num(90)
nl["cien"]=nl["cientos"]=num(100)
nl["quinientos"]=num(500)
nl["setecientos "]=num(700)
nl["novecientos"]=num(900)
nl["mil"]=onemul(10**3)
nl["millón"]=nl["millones"]=mul(10**6)
nl["billón"]=nl["billones"]=mul(10**12)
nl["y"]=plus()
return nl
if __name__ == "__main__":
itnum=num_it()
print("it",str2num(itnum,sys.argv[1]))
ennum=num_en()
print("en",str2num(ennum,sys.argv[1]))
frnum=num_fr()
print("fr",str2num(frnum,sys.argv[1]))
denum=num_de()
print("de",str2num(denum,sys.argv[1]))
esnum=num_es()
print("es",str2num(esnum,sys.argv[1]))