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Unknown errors, RSS feed

P: 11
From my other post I am making a simple program that creates an RSS feed with Python. Now when I run my program so far, I get errors. It says "something is not defined". The word something is replaced by the name of the function I'm trying to use. my article function when ran, comes up with "article is not defined" etc.

Here's my code: What is wrong with it?

Expand|Select|Wrap|Line Numbers
  1. #!/usr/bin/env python
  2. import ftplib
  3. import getpass
  4.  
  5. def mainfeed():
  6.     name=raw_input("Name of Feed: ")
  7.     desc=raw_input("Description of Feed: ")
  8.     url=raw_input("Location of Website: ")
  9.     again()
  10.  
  11. def again():
  12.     again=raw_input("Would you like to add an article to the feed? Y/N: ")
  13.     if again == "Y":
  14.         article()
  15.     elif again =="N":
  16.         writeb()
  17.     else:
  18.         print again + """is not a valid option. You must select either 'Y' or 'N'"""
  19.         fail()
  20.  
  21. def fail():
  22.     again()
  23.  
  24. def article():
  25.     aname=raw_input("Name of Article: ")
  26.     adesc=raw_input("Description of Article: ")
  27.     aurl=raw_input("Location of Article: ")
  28.     finish()
  29.  
  30. def finish():
  31.     print "Saving parameters to rss-feed.xml...please wait..."
  32.     print "Finished"   
  33.     writea()
  34.  
  35. def writea():
  36.     file_name = "rss-feed.xml"
  37.     f = open(file_name, 'w')
  38.     outlist = ['<?xml version="1.0" encoding="ISO-8859-1" ?>', '<rss version="0.91">',]
  39.     outlist.append('  <channel>\n    <title>%s</title>' % name)
  40.     outlist.append('    <link>%s</link>' % url)
  41.     outlist.append('    <description>%s</description>' % desc)
  42.     outlist.append('    <item>\n        <title>%s</title>' % aname)
  43.     outlist.append('        <link>%s</link>' % aurl)
  44.     outlist.append('        <description>%s</description>' % adesc)
  45.     outlist.append('    </item>')
  46.     outlist.append('  </channel>')
  47.     outlist.append('</rss>')  
  48.     f.write('\n'.join(outlist))
  49.     f.close()
  50.     ftpqe()
  51.  
  52. def writeb():
  53.     file_name = "rss-feed.xml"
  54.     f = open(file_name, 'w')
  55.     outlist = ['<?xml version="1.0" encoding="ISO-8859-1" ?>', '<rss version="0.91">',]
  56.     outlist.append('  <channel>\n    <title>%s</title>' % name)
  57.     outlist.append('    <link>%s</link>' % url)
  58.     outlist.append('    <description>%s</description>' % desc)
  59.     outlist.append('  </channel>')
  60.     outlist.append('</rss>')  
  61.     f.write('\n'.join(outlist))
  62.     f.close()
  63.     ftpqe()
  64.  
  65. def ftpqe():
  66.     ftpq=raw_input("Do you want to upload your XML file to your website via FTP? Y/N: ")
  67.     if ftpq == "Y":
  68.         ftp()
  69.     elif ftpq =="N":
  70.         end()
  71.     else:
  72.         print again + """is not a valid option. You must select either 'Y' or 'N'"""
  73.         fail2()
  74.  
  75. def fail2():
  76.     ftpqe()
  77.  
  78. def ftp():
  79.     server=raw_input("Server name: ")
  80.     login=raw_input("Enter your login: ")
  81.     password = getpass.unix_getpass("Enter your password: ")
  82.     ftplib.FTP(server,login,password)
  83.     f = open('rss-feed.xml','rb') 
  84.     s.storbinary('STOR rss-feed.xml', f)
  85.     f.close()
  86.     s.quit()
  87.     print "Your file has been uploaded"
  88.     end()
  89.  
  90. def end():
  91.     print "Thank you"
  92.  
  93. mainfeed()
Dec 24 '08 #1
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10 Replies


bvdet
Expert Mod 2.5K+
P: 2,851
In this line:
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  1. s.storbinary('STOR rss-feed.xml', f)
I don't see where s is defined. It would be helpful if you would post the exact error message and include all tracebacks. If you are not seeing this information, try enclosing your code in a try/except block similiar to this:
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  1. import sys, traceback
  2.  
  3. def formatExceptionInfo(level=6):
  4.     error_type, error_value, trbk = sys.exc_info()
  5.     info_list = ["Error: %s \nDescription: %s \nTraceback:\n" % (error_type.__name__, error_value), ]
  6.     info_list.extend(traceback.format_tb(trbk, level))
  7.     return ''.join(info_list)
  8.  
  9. try:
  10.     mainfeed()
  11. except:
  12.     print formatExceptionInfo()
Dec 24 '08 #2

P: 11
Here are the errors I get so far:

No 1:
Expand|Select|Wrap|Line Numbers
  1. Name of Feed: test
  2. Description of Feed: test
  3. Location of Website: test
  4. Would you like to add an article to the feed? Y/N: N
  5. Traceback (most recent call last):
  6.   File "rssgps.py", line 93, in <module>
  7.     mainfeed()
  8.   File "rssgps.py", line 9, in mainfeed
  9.     again()
  10.   File "rssgps.py", line 16, in again
  11.     writeb()
  12.   File "rssgps.py", line 56, in writeb
  13.     outlist.append('  <channel>\n    <title>%s</title>' % name)
  14. NameError: global name 'name' is not defined
  15.  
no 2
Expand|Select|Wrap|Line Numbers
  1. Name of Feed: test
  2. Description of Feed: test
  3. Location of Website: test
  4. Would you like to add an article to the feed? Y/N: Y
  5. Name of Article: test
  6. Description of Article: test
  7. Location of Article: test
  8. Saving parameters to rss-feed.xml...please wait...
  9. Finished
  10. Traceback (most recent call last):
  11.   File "rssgps.py", line 93, in <module>
  12.     mainfeed()
  13.   File "rssgps.py", line 9, in mainfeed
  14.     again()
  15.   File "rssgps.py", line 14, in again
  16.     article()
  17.   File "rssgps.py", line 28, in article
  18.     finish()
  19.   File "rssgps.py", line 33, in finish
  20.     writea()
  21.   File "rssgps.py", line 39, in writea
  22.     outlist.append('  <channel>\n    <title>%s</title>' % name)
  23. NameError: global name 'name' is not defined
  24.  
  25.  
I have more on the functions that are executed later on in the script, but this is so far.

But name IS defined, from the raw input at the start of the mainfeed function!
Dec 24 '08 #3

bvdet
Expert Mod 2.5K+
P: 2,851
It is a matter of scope and the way Python resolves names. When a function executes, a new namespace is created which includes the names of the function parameters and variables assigned in the function. When resolving names, the interpreter first checks the local namespace, in this case, the namespace created by the function. If no match is found, it checks the global namespace. The global namespace is always the module which defines the function. If no match is found, it checks the built-in namespace before raising a NameError exception. As you can see, the interpreter never checks the namespaces of the other functions in your module. You must make the variable names global or pass arguments to your functions.
Dec 24 '08 #4

P: 11
@bvdet
Thanks! I'll make them global now, and then I'll post the other errors later. That's one bit solved.
Dec 24 '08 #5

P: 11
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  1. #!/usr/bin/env python
  2. import ftplib
  3. import getpass
  4.  
  5. name=raw_input("Name of Feed: ")
  6. desc=raw_input("Description of Feed: ")
  7. url=raw_input("Location of Website: ")
  8. print "Your main feeds settings have been updated"
  9. print "Now information about adding an article to the feed.Other articles can be added manually later"
  10. aname=raw_input("Name of Article: ")
  11. adesc=raw_input("Description of Article: ")
  12. aurl=raw_input("Location of Article: ")
  13. finish()
  14.  
  15. def finish():
  16.     print "Saving parameters to rss-feed.xml...please wait..."
  17.     print "Finished"   
  18.     writea()
  19.  
  20. def writea():
  21.     file_name = "rss-feed.xml"
  22.     f = open(file_name, 'w')
  23.     outlist = ['<?xml version="1.0" encoding="ISO-8859-1" ?>', '<rss version="0.91">',]
  24.     outlist.append('  <channel>\n    <title>%s</title>' % name)
  25.     outlist.append('    <link>%s</link>' % url)
  26.     outlist.append('    <description>%s</description>' % desc)
  27.     outlist.append('    <item>\n        <title>%s</title>' % aname)
  28.     outlist.append('        <link>%s</link>' % aurl)
  29.     outlist.append('        <description>%s</description>' % adesc)
  30.     outlist.append('    </item>')
  31.     outlist.append('  </channel>')
  32.     outlist.append('</rss>')  
  33.     f.write('\n'.join(outlist))
  34.     f.close()
  35.     ftpqe()
  36.  
  37. def writeb():
  38.     file_name = "rss-feed.xml"
  39.     f = open(file_name, 'w')
  40.     outlist = ['<?xml version="1.0" encoding="ISO-8859-1" ?>', '<rss version="0.91">',]
  41.     outlist.append('  <channel>\n    <title>%s</title>' % name)
  42.     outlist.append('    <link>%s</link>' % url)
  43.     outlist.append('    <description>%s</description>' % desc)
  44.     outlist.append('  </channel>')
  45.     outlist.append('</rss>')  
  46.     f.write('\n'.join(outlist))
  47.     f.close()
  48.     ftpqe()
  49.  
  50. def ftpqe():
  51.     ftpq=raw_input("Do you want to upload your XML file to your website via FTP? Y/N: ")
  52.     if ftpq == "Y":
  53.         ftp()
  54.     elif ftpq =="N":
  55.         end()
  56.     else:
  57.         print again + """is not a valid option. You must select either 'Y' or 'N'"""
  58.         fail2()
  59.  
  60. def fail2():
  61.     ftpqe()
  62.  
  63. def ftp():
  64.     server=raw_input("Server name: ")
  65.     login=raw_input("Enter your login: ")
  66.     password = getpass.unix_getpass("Enter your password: ")
  67.     ftplib.FTP(server,login,password)
  68.     f = open('rss-feed.xml','rb') 
  69.     s.storbinary('STOR rss-feed.xml', f)
  70.     f.close()
  71.     s.quit()
  72.     print "Your file has been uploaded"
  73.     end()
  74.  
  75. def end():
  76.     print "Thank you for using "
  77.  
I changed it to this now, the names and article names have been made global, and now I get this error. It's this I don't understand the most, because finish is obviously a function. error:

Expand|Select|Wrap|Line Numbers
  1. Traceback (most recent call last):
  2.   File "rssgps.py", line 13, in <module>
  3.     finish()
  4. NameError: name 'finish' is not defined
  5.  
  6.  
Do I misunderstand functions?
Dec 24 '08 #6

bvdet
Expert Mod 2.5K+
P: 2,851
You have to define it before you call it.
Expand|Select|Wrap|Line Numbers
  1. def finish():
  2.     ....do stuff....
  3.  
  4. finish()
Dec 24 '08 #7

P: 11
Thanks once again, you've really helped me. Now 1 final question.
Everything works apart from the FTP. This is the error:
Expand|Select|Wrap|Line Numbers
  1. Do you want to upload your XML file to your website via FTP? Y/N: Y
  2. Server name: test
  3. Enter your login: test
  4. Enter your password: 
  5. Traceback (most recent call last):
  6.   File "rssgps.py", line 76, in <module>
  7.     finish()
  8.   File "rssgps.py", line 8, in finish
  9.     writea()
  10.   File "rssgps.py", line 25, in writea
  11.     ftpqe()
  12.   File "rssgps.py", line 43, in ftpqe
  13.     ftp()
  14.   File "rssgps.py", line 57, in ftp
  15.     ftplib.FTP(server,login,password)
  16.   File "/usr/lib/python2.5/ftplib.py", line 107, in __init__
  17.     self.connect(host)
  18.   File "/usr/lib/python2.5/ftplib.py", line 117, in connect
  19.     for res in socket.getaddrinfo(self.host, self.port, 0, socket.SOCK_STREAM):
  20. socket.gaierror: (-2, 'Name or service not known')
  21.  
  22.  
Any ideas? Thanks
Dec 24 '08 #8

bvdet
Expert Mod 2.5K+
P: 2,851
You did not assign the ftplib.FTP object to a variable. Try this:
Expand|Select|Wrap|Line Numbers
  1.     s = ftplib.FTP(server,login,password)
  2.     f = open('rss-feed.xml','rb') 
  3.     s.storbinary('STOR rss-feed.xml', f)
  4.     f.close()
  5.     s.quit()
If that is not the problem, you may have an incorrect server name or user name. This worked for me on my FTP server:
Expand|Select|Wrap|Line Numbers
  1. >>> import ftplib
  2. >>> f = ftplib.FTP('ftp.bvdetailing.com', '*********', '********')
  3. >>> f.mkd('ftplib_test')
  4. 'ftplib_test'
  5. >>> f.close()
  6. >>> 
Dec 24 '08 #9

P: 11
Yet again, thank you. I can only keep thanking you!
Dec 24 '08 #10

bvdet
Expert Mod 2.5K+
P: 2,851
You're welcome. You did a good job of defining your problem and seeing the thread through. Fortunately, I was able to help.

-BV
Dec 24 '08 #11

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