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newmaid
newmaid
Last Activity: Feb 28 '08, 04:25 PM
Joined: Feb 15 '08
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  • newmaid
    started a topic csv to list
    in Python

    csv to list

    hi all..

    if i had a csv file that had data in the format:

    1, male, 1997
    2, male, 2000
    3, female , 1977
    etc

    how would i pull all 3 columns out of the csv into lists

    thanks for your help
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    • newmaid
      replied to slowdown after each loop
      in Python
      thanks for your response bvdet. I think i found the problem. the portfolioHPR list was not being emptied after each loop .. and so was just getting bigger and bigger.

      i have added [code=python] del porftolioHPR[:] [/code] after the calcs and it seems to have stopped the problem.

      in the meantime I will try all your tips

      thanks again...
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        Leave a comment:

      • newmaid
        started a topic slowdown after each loop
        in Python

        slowdown after each loop

        Hi all

        just put together this little bit of code... I am sure it is heavily flawed:(... but can someone please point out to me the reason why it becomes slower after every loop. thanks!!!

        ** ....i am using "globals()[]" to try and create dynamic variables.. i am guessing that this a very bad way to do it?

        Code:
        j = 0

while j < x:

    s = 0
        ...
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        • newmaid
          replied to newbie loop efficiency
          in Python
          thanks for your reply .. i am looking forward to seeing some ubercode :)

          dshimer .. btw .. is

          Code:
          for i in range(5):print i
          faster than


          Code:
           
i = 0
while i < 5:
    print i
    i = i + 1
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            Leave a comment:

          • newmaid
            started a topic newbie loop efficiency
            in Python

            newbie loop efficiency

            Hi all,

            I need some help understanding the efficiency of my code. I am new to python(and coding in general) :(

            if i have a code like this


            Code:
            L2 = []
L3 = []

i = 0
while i < len(L0):
    if L1[i] == X:
        L2.append(Y)
        L3.append(Z)
    else:
        L2.append(0)
        L3.append(0)
    i = i + 1
            ...
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