ProvaPratica 2013.05.29

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[Python 3]

'''
Prova Pratica di Laboratorio di Sistemi Operativi
29 maggio 2013
Esercizio 3

URL: http://www.cs.unibo.it/~renzo/so/pratiche/2013.05.29.pdf

@author: Tommaso Ognibene
'''

import os, sys

def Main(argv):
    # Check number of arguments
    if len(argv) != 2:
        print("The function requires one argument to be passed in.")
        return
    
    # Check parameters
    topDir = str(sys.argv[1])
    if not os.path.isdir(topDir):
        print("The parameter should be an existing directory.")
        return
    
    # Build a dictionary with key-value pair {file extension - total size}
    extensionSize = { }
    GetSize(topDir, extensionSize)
    
    # Print results
    PrintResults(extensionSize)

def GetSize(topDir, extensionSize):
    for dirPath, dirNames, files in os.walk(topDir):
        for file in files:
            # 'example.mp3' -> ['example', 'mp3']
            # 'example.tar.gz' -> ['example', 'tar', 'gz']
            parts = file.split('.')
            # ['example', 'mp3'] -> ['mp3']
            # ['example', 'tar', 'gz'] -> ['tar', 'gz']
            parts = parts[1:]
            # ['mp3'] -> '.mp3'
            # ['tar', 'gz'] -> '.tar.gz'
            fileExtension = ".{0}".format(".".join(str(part) for part in parts))
            
            # Compute the size in Bytes and update the dictionary
            filePath = os.path.join(dirPath, file)   
            fileSize = os.path.getsize(filePath)
            extensionSize[fileExtension] = extensionSize.get(fileExtension, 0) + fileSize

# Print results
def PrintResults(extensionSize):
    for key, value in sorted(extensionSize.items()):
        print('{0}: {1} Bytes.'.format(key, value))
        
if __name__ == "__main__":
    sys.exit(Main(sys.argv))

import os, sys, copy

def dotsubstr(a):#restituisce la sottostringa .suffisso #fcd = os.listdir('{0}'.format(arg1)) i=0 try: while a[i]!='.': i=i+1 return a[i:] except IndexError: return -1

def compliarg(li,arg):#restituisce una lista di tutti gli elementi contenenti la sottostringa arg come suffisso res=[] while li != []: a=li.pop() if a.endswith(arg): res.append(a) return res

def listremintsect(l2,l1):#restituisce una lista res = l1 - intersezione di l1 ed l2 res=[] while l1 != []: a=l1.pop() if not a in l2: res.append(a) return res

def createpathlist(c,path):#restituisce una lista di file c con relativo path. res = [] while c != []: res.append('{0}/{1}'.format(path,c.pop())) return res

def totsizes(d): #data una lista d di path restituisce la somma di tutti i size di d res = 0 while d != []: res = res + os.path.getsize('{0}'.format(d.pop())) return res

def listsubstr(arg): #ritorna un dizionario del tipo diz[str(suffisso)] = int(size relativo al suffisso) res = {} fcd = os.listdir('{0}'.format(arg)) while fcd != []: fcdtmp=copy.deepcopy(fcd) #BUGGONE SENZA COPY!!!!!! a = fcd.pop() b = dotsubstr(a) if b == -1: continue else: pass c = compliarg(fcdtmp,b) s=copy.deepcopy(c) #!!!!!!!!!!!!!!!!!!!!!!!!! d = createpathlist(c,arg) res[b] = totsizes(d)

fcd = listremintsect(s,fcd)

return res


res = listsubstr(sys.argv[1])

print(res)