'int' object has no attribute '__getitem__'
Question:
import math
import os
class collection:
col = [[0 for col in range(5)] for row in range(6)]
dist = [[0 for col in range(6)] for row in range(6)]
filename = ""
result = ""
def __init__(self,arg1):
self.filename = arg1
def coll(self):
for i in range(6):
try:
if(i==0):
f = open(self.filename,'r')
elif(i==1):
f = open("chap1.txt",'r')
elif(i==2):
f = open("chap2.txt",'r')
elif(i==3):
f = open("chap3.txt",'r')
elif(i==4):
f = open("chap4.txt",'r')
elif(i==5):
f = open("chap5.txt",'r')
for j in range(5):
self.result = f.readline()
self.col[i][j] = self.result
finally:
print "file handling error"
def distance(self):
for i in range[6]:
for j in range[6]:
dis = 0
for k in range[5]:
dis += math.fabs((self.col[i][k]-self.col[j][k])*(j-i))
self.dist[i][j] = dis
self.dist[i][i] = sys.maxdouble
return self.dist
class profile:
dist = [[0 for col in range(6)]for row in range(6)]
filename = ""
pque = [[0 for col in range(6)]for row in range(6)]
d = [[0 for col in range(6)]for row in range(6)]
par = [[0 for col in range(6)]for row in range(6)]
st = 0
def __init__(self,arg1):
self.filename = arg1
def begin(self):
ob = collection(self.filename)
ob.coll()
dist = ob.distance()
def sssp(self):
for i in range(6):
pque[i] = sys.maxdouble
d[i] = sys.maxdouble
d[0] = 0
pque[0] = 0
while isempty()==0:
u = extract_min()
for i in range(6):
if d[i]>d[u]+dist[u][i]:
d[i] = d[u]+dist[u][i]
pque_deckey(i,d[i])
par[i]=u
if u!=0:
print u
print "n"
for i in range(6):
print par[i]
def extract_min():
ret = 0
shift = 0
minimum = pque[0]
for i in range(6):
if pque[i]<minimum:
minimum = pque[i]
ret = i
pque[ret] = sys.maxdouble
return ret
def isempty(self):
count = 0
for i in range(6):
if pque[i] == sys.maxdouble:
count=count+1
if count==6:
return 1
else :
return 0
def pque_deckey(self,im,di):
pque[im]=di
class main:
filename = raw_input("enter name of student:n")
filename = filename + ".txt"
if(os.path.exists(filename)==1):
f = file(filename,"r")
else:
f = file(filename,"w+")
att1 = raw_input("att1 score:n")
att2 = raw_input("att2 score:n")
att3 = raw_input("att3 score:n")
att4 = raw_input("att4 score:n")
att5 = raw_input("att5 score:n")
f.write(att1)
f.write("n")
f.write(att2)
f.write("n")
f.write(att3)
f.write("n")
f.write(att4)
f.write("n")
f.write(att5)
f.write("n")
stud = profile(filename)
stud.begin()
stud.sssp()
it shows a runtime error :
File "C:Python27winculum.py", line 33, in coll
self.col[i][j] = self.result
TypeError: 'int' object has no attribute '__getitem__'
I am just a beginner at python, and I am unable to rectify this even after searching on the net.
Answers:
Some of the problems:
for i in range[6]:
for j in range[6]:
should be:
range(6)
The error:
'int' object has no attribute '__getitem__'
means that you’re attempting to apply the index operator []
on an int, not a list. So is col
not a list, even when it should be? Let’s start from that.
Look here:
col = [[0 for col in range(5)] for row in range(6)]
Use a different variable name inside, looks like the list comprehension overwrites the col
variable during iteration. (Not during the iteration when you set col
, but during the following ones.)
This error could be an indication that variable with the same name has been used in your code earlier, but for other purposes. Possibly, a variable has been given a name that coincides with the existing function used later in the code.
you can also covert int to str first and assign index to it then again convert it to int
like this:
int(str(x)[n]) //where x is an integer value
I had a similar issue recently while working on recursion and nested lists.
I declared:
print(r_sum([1,2,3[1,2,3],]))
instead of
print(r_sum([1,2,3,[1,2,3],]))
Note the comma after the number 3
import math
import os
class collection:
col = [[0 for col in range(5)] for row in range(6)]
dist = [[0 for col in range(6)] for row in range(6)]
filename = ""
result = ""
def __init__(self,arg1):
self.filename = arg1
def coll(self):
for i in range(6):
try:
if(i==0):
f = open(self.filename,'r')
elif(i==1):
f = open("chap1.txt",'r')
elif(i==2):
f = open("chap2.txt",'r')
elif(i==3):
f = open("chap3.txt",'r')
elif(i==4):
f = open("chap4.txt",'r')
elif(i==5):
f = open("chap5.txt",'r')
for j in range(5):
self.result = f.readline()
self.col[i][j] = self.result
finally:
print "file handling error"
def distance(self):
for i in range[6]:
for j in range[6]:
dis = 0
for k in range[5]:
dis += math.fabs((self.col[i][k]-self.col[j][k])*(j-i))
self.dist[i][j] = dis
self.dist[i][i] = sys.maxdouble
return self.dist
class profile:
dist = [[0 for col in range(6)]for row in range(6)]
filename = ""
pque = [[0 for col in range(6)]for row in range(6)]
d = [[0 for col in range(6)]for row in range(6)]
par = [[0 for col in range(6)]for row in range(6)]
st = 0
def __init__(self,arg1):
self.filename = arg1
def begin(self):
ob = collection(self.filename)
ob.coll()
dist = ob.distance()
def sssp(self):
for i in range(6):
pque[i] = sys.maxdouble
d[i] = sys.maxdouble
d[0] = 0
pque[0] = 0
while isempty()==0:
u = extract_min()
for i in range(6):
if d[i]>d[u]+dist[u][i]:
d[i] = d[u]+dist[u][i]
pque_deckey(i,d[i])
par[i]=u
if u!=0:
print u
print "n"
for i in range(6):
print par[i]
def extract_min():
ret = 0
shift = 0
minimum = pque[0]
for i in range(6):
if pque[i]<minimum:
minimum = pque[i]
ret = i
pque[ret] = sys.maxdouble
return ret
def isempty(self):
count = 0
for i in range(6):
if pque[i] == sys.maxdouble:
count=count+1
if count==6:
return 1
else :
return 0
def pque_deckey(self,im,di):
pque[im]=di
class main:
filename = raw_input("enter name of student:n")
filename = filename + ".txt"
if(os.path.exists(filename)==1):
f = file(filename,"r")
else:
f = file(filename,"w+")
att1 = raw_input("att1 score:n")
att2 = raw_input("att2 score:n")
att3 = raw_input("att3 score:n")
att4 = raw_input("att4 score:n")
att5 = raw_input("att5 score:n")
f.write(att1)
f.write("n")
f.write(att2)
f.write("n")
f.write(att3)
f.write("n")
f.write(att4)
f.write("n")
f.write(att5)
f.write("n")
stud = profile(filename)
stud.begin()
stud.sssp()
it shows a runtime error :
File "C:Python27winculum.py", line 33, in coll
self.col[i][j] = self.result
TypeError: 'int' object has no attribute '__getitem__'
I am just a beginner at python, and I am unable to rectify this even after searching on the net.
Some of the problems:
for i in range[6]:
for j in range[6]:
should be:
range(6)
The error:
'int' object has no attribute '__getitem__'
means that you’re attempting to apply the index operator []
on an int, not a list. So is col
not a list, even when it should be? Let’s start from that.
Look here:
col = [[0 for col in range(5)] for row in range(6)]
Use a different variable name inside, looks like the list comprehension overwrites the col
variable during iteration. (Not during the iteration when you set col
, but during the following ones.)
This error could be an indication that variable with the same name has been used in your code earlier, but for other purposes. Possibly, a variable has been given a name that coincides with the existing function used later in the code.
you can also covert int to str first and assign index to it then again convert it to int
like this:
int(str(x)[n]) //where x is an integer value
I had a similar issue recently while working on recursion and nested lists.
I declared:
print(r_sum([1,2,3[1,2,3],]))
instead of
print(r_sum([1,2,3,[1,2,3],]))
Note the comma after the number 3