CODEWITHSUNDEEP
python
user3258267
user3258267

Reputation: 47

Reading a file in python and creating a list turns out to an empty list

I am using the following code to read from a file:

G={}
for line in fin: # load data, create adj lists
    lst=[]
    size= len(line)
    i=0
    while (i<size):
        if line[i] in ' \t\r\n': pass
        else:
            lst.append(int(line[i:i+2].strip()))
            i=i+1
        i=i+1
    G[lst[0] ]=lst[1:]

print(G)

But G always turns out to be empty."foo1,txt" contains the following data:

1 15
2 6 10
3 10
4 9
5

Upvotes: 0

Views: 931

Answers (2)

jack
jack

Reputation: 505

I have writen alternte code for appending data to list from file, you can refer if you want this code:

   f = open('filename')

   dic = []

   for l in f:

       v = l.split(' ')
       v= map(lambda s: s.strip(), v)


      dic=dic+v


  print dic

output:

   ['1', '15', '2', '6', '10', '3', '10', '4', '9', '5', '']

Upvotes: 1

Hubert Barc
Hubert Barc

Reputation: 59

Try this, its most pythonic i think:

fin = open("foo1.txt")
G={}
for line in fin: # load data, create adj lists
    lst = line.split()
    lst = [int(x) for x in lst]
    G[lst[0] ]=lst[1:]
print(G)

Upvotes: 0

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