Error: string index out of range

Question

I coded the python function given below:

def processstring(string):
    gtkname=""
    if string[0]=="/":
        i=1
        while(string[i]!="/"):
            if i==len(string):
                break
            gtkname=gtkname+string[i]
            i=i+1
        return gtkname
    return string

when I execute the code it gives me the following error:

while(string[i]!="/"):
IndexError: string index out of range.

I don't know why is it giving this error.

Are you trying to remove // comments starter from the start of the string? — sshashank124
– sshashank124, Commented May 18, 2015 at 6:01
What is the input you are passing to the function while running the program ? — sachin saxena
– sachin saxena, Commented May 18, 2015 at 6:02
Remove the i=1 line; also, what problem are you trying to solve with this function? — poke
– poke, Commented May 18, 2015 at 6:07
Condition should be i+1==len(string), not i==len(string), because python indicies are zero-based — Konstantin
– Konstantin, Commented May 18, 2015 at 6:09

Matthew · Accepted Answer · 2015-05-18 06:13:29Z

3

The condition is causing the error: while string[i] != "/":

After you increment i, you check that condition before you check if i == len(string): to break the loop. Move that check to the end of the loop:

    while(string[i]!="/"):
        gtkname=gtkname+string[i]
        i=i+1
        if i==len(string):
            break

answered May 18, 2015 at 6:13

Matthew

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Comments

648trindade · Accepted Answer · 2015-05-18 06:14:37Z

0

You are not manipulating the iteration on string characters in a proper way

def processstring(string):
    if string[0]=="/":
        return string[1:string.find("/",1)]
    return string

Python give us ways to not using direct iteration on index of a list

answered May 18, 2015 at 6:14

648trindade

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