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#1
May 28th, 2004, 09:13 AM
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Creating a list of tuples
I am trying to populate a list ot tuples on the fly from a file but keep running into these errors:
Code:
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "forum.py", line 84, in getPosts
posts[0] = [(details[0],(details[1],details[2],details[3]),post)]
IndexError: list assignment index out of range
Here is and simplified example of what i am trying to do: Code:
def getDetails(path, id):
"Returns a list of user details in file "
f = open(path + id + ".info", "r")
index = 0
posts = []
line = f.readline()
while line != "":
line = f.readline()
details = string.split(line[:-1], ",")
posts[index] = [(details[0],(details[1],details[2],details[3]),details[4])]
index += 1
f.close()
return posts
Can somebody help I seem to be stuck
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#2
May 28th, 2004, 10:11 AM
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Unlike some languages, Python does not automatically extend lists when you assign values past the end. You need to use the append method instead, i.e.
Code:
posts.append([(details[0],(details[1],details[2],details[3]),details[4])]) BTW, if the original data is in CSV (comma separated variables) format then you could use the new csv module to parse it. This will correctly handle commas inside quoted strings. Dave - The Developers' Coach
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