Difference between revisions of "ProvaPratica 2013.05.29"
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Revision as of 11:27, 22 November 2013
[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))
mia versione
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 path 'path' relativi ai file contenuti in c.
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
try:
res = listsubstr(sys.argv[1])
a=list(res.keys())
while a != []:
b = a.pop()
print('{0}:\t{1}'.format(b,res[b]))
except OSError:
print("Could not solve path")
-fede