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Arevos · May 19th, 2006, 5:37 PM

Debugging is the skill of getting your programs to work. One way to debug a piece of code is to go through it and work out what it's doing.

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industry_url = "get_industry_urls(industry_page)"

This sets the industry_url to hold a piece of text (or a string). Strings are denoted by quotation marks. I'll hazard a guess and say that this isn't what you want to do.

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for industry_url in get_industry_urls(industry_page):
    	company_index = get_company_index(industry_url)

This piece of code goes through each of the industries in turn, and for each industry, it puts the company index into a variable called "company_index", overwriting the previous value.

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print get_company_index(industry_url)

This code uses the last industry_url value and gets the company index of that.

Since hammering Yahoo! with some more iterative searches probably isn't a good idea, I'll show you the answer:

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for industry_url in get_industry_urls(industry_page):
	print get_company_index(industry_url)

However, you have to understand the answer, otherwise it's of no use, so explain why it works

Also, Yahoo! seems to have a filter of some kind to stop people from DDOSing it's site. Thus, we need to put in a delay between fetching each site. The sleep function does this well. Sleep(1) will wait for 1 second, sleep(2) will wait for 2 and so forth:

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from time import sleep

for industry_url in get_industry_urls(industry_page):
	print get_company_index(industry_url)
	sleep(1)

Again, explain what this does.

May 19th, 2006, 5:37 PM	#79
Arevos Programming Guru Join Date: Aug 2005 Location: England Posts: 1,499 Rep Power: 5	Debugging is the skill of getting your programs to work. One way to debug a piece of code is to go through it and work out what it's doing. (Toggle Plain Text) industry_url = "get_industry_urls(industry_page)" industry_url = "get_industry_urls(industry_page)" This sets the industry_url to hold a piece of text (or a string). Strings are denoted by quotation marks. I'll hazard a guess and say that this isn't what you want to do. (Toggle Plain Text) for industry_url in get_industry_urls(industry_page): company_index = get_company_index(industry_url) for industry_url in get_industry_urls(industry_page): company_index = get_company_index(industry_url) This piece of code goes through each of the industries in turn, and for each industry, it puts the company index into a variable called "company_index", overwriting the previous value. (Toggle Plain Text) print get_company_index(industry_url) print get_company_index(industry_url) This code uses the last industry_url value and gets the company index of that. Since hammering Yahoo! with some more iterative searches probably isn't a good idea, I'll show you the answer: (Toggle Plain Text) for industry_url in get_industry_urls(industry_page): print get_company_index(industry_url) for industry_url in get_industry_urls(industry_page): print get_company_index(industry_url) However, you have to understand the answer, otherwise it's of no use, so explain why it works Also, Yahoo! seems to have a filter of some kind to stop people from DDOSing it's site. Thus, we need to put in a delay between fetching each site. The sleep function does this well. Sleep(1) will wait for 1 second, sleep(2) will wait for 2 and so forth: (Toggle Plain Text) from time import sleep for industry_url in get_industry_urls(industry_page): print get_company_index(industry_url) sleep(1) from time import sleep for industry_url in get_industry_urls(industry_page): print get_company_index(industry_url) sleep(1) Again, explain what this does.