# Use the FTP Directory to retrieve KMZ try: f.retrbinary('RETR %s' % FILE, open(FILE, 'wb').write) except ftplib.error_perm: print 'ERROR: cannot read file "%s"' % FILE os.unlink(FILE) else: print '*** Downloaded "%s" to CWD' % FILE Do they seem right to you ? This is from the book Programming ArcGIS 10.1 with Python cookbook. When I ran it in Pyscripter 2.5.3.0 and it gave me the error : Traceback (most recent call last): File "C:\ArcpyBook\Appendix2\ftp.py", line 45, in f.retrbinary('RETR %s' % FILE, open(FILE, 'wb').write) File "C:\Python27\ArcGIS10.1\lib\ftplib.py", line 398, in retrbinary self.voidcmd('TYPE I') File "C:\Python27\ArcGIS10.1\lib\ftplib.py", line 248, in voidcmd self.putcmd(cmd) File "C:\Python27\ArcGIS10.1\lib\ftplib.py", line 178, in putcmd self.putline(line) File "C:\Python27\ArcGIS10.1\lib\ftplib.py", line 173, in putline self.sock.sendall(line) AttributeError: 'NoneType' object has no attribute 'sendall'

The issue with your script is that it keeps processing after an error condition. The sock object is invoked as soon as your create your FTP object (see the __init__ function in the ftplib.py file). This means that the sock object is not a NoneType at this point. However, as Dan mentions, the sock object is a NoneType when you attempt to execute the f.retrbinary() function. This is because the previous code block has an error condition and you call the f.quit() function. * The issue is that the FTP directory does not exist. * The error is the f.quit() function explicitly sets the sock object to None, then your code attempts to use it in the next block. You should modify your code to exit if an error occurs or place conditional statements around code blocks to ensure that any pre-conditions are met. Also, there are a few missing else statements that will when messages are printed, for example: try: f.cwd(DIRN) except ftplib.error_perm: print 'ERROR: cannot CD to "%s"' % DIRN f.quit() else: # <-- missing print '*** Changed to "%s" folder' % DIRN

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Retrbindary code not working ?

progis99

# Use the FTP Directory to retrieve KMZ
try:
    f.retrbinary('RETR %s' % FILE, open(FILE, 'wb').write)
except ftplib.error_perm:
    print 'ERROR: cannot read file "%s"' % FILE
    os.unlink(FILE)
else:
    print '*** Downloaded "%s" to CWD' % FILE

Do they seem right to you ? This is from the book Programming ArcGIS 10.1 with Python cookbook. When I ran it in Pyscripter 2.5.3.0 and it gave me the error :

Traceback (most recent call last):

File "C:\ArcpyBook\Appendix2\ftp.py", line 45, in <module>

f.retrbinary('RETR %s' % FILE, open(FILE, 'wb').write)

File "C:\Python27\ArcGIS10.1\lib\ftplib.py", line 398, in retrbinary

self.voidcmd('TYPE I')

File "C:\Python27\ArcGIS10.1\lib\ftplib.py", line 248, in voidcmd

self.putcmd(cmd)

File "C:\Python27\ArcGIS10.1\lib\ftplib.py", line 178, in putcmd

self.putline(line)

File "C:\Python27\ArcGIS10.1\lib\ftplib.py", line 173, in putline

self.sock.sendall(line)

AttributeError: 'NoneType' object has no attribute 'sendall'

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progis99

Thank you.

OwenEarley

The issue with your script is that it keeps processing after an error condition.

The sock object is invoked as soon as your create your FTP object (see the __init__ function in the ftplib.py file). This means that the sock object is not a NoneType at this point.

However, as Dan mentions, the sock object is a NoneType when you attempt to execute the f.retrbinary() function. This is because the previous code block has an error condition and you call the f.quit() function.

The issue is that the FTP directory does not exist.
The error is the f.quit() function explicitly sets the sock object to None, then your code attempts to use it in the next block.

You should modify your code to exit if an error occurs or place conditional statements around code blocks to ensure that any pre-conditions are met.

Also, there are a few missing else statements that will when messages are printed, for example:

try: 
    f.cwd(DIRN) 
except ftplib.error_perm: 
    print 'ERROR: cannot CD to "%s"'  % DIRN 
    f.quit() 
else: # <-- missing
    print '*** Changed to "%s" folder' % DIRN

DanPatterson_Retired

The only thing remotely similar to 'sock' is 'socket' hmmm

progis99

# Import moduels
import ftplib
import os.path
from ftplib import FTP


HOST = 'ftp.nifc.gov'
DIRN = '/incident_Specific_Data/ALASKA/Fire_Perimeters/20090805_1500'
FILE = 'FirePerimeters_20090805_1500.kmz'


# Create a block to connection or not


try:
    f = ftplib.FTP(HOST)
except (socket.error, socket.gaierror), e:
        print 'ERROR: cannot reach "%s"' % HOST
        print '*** Connected to host "%s"' % HOST


# to log in anonymously
try:
    f.login()
except ftplib.error_perm:
    print 'ERROR: cannot login anonymously'
    f.quit()
    print '*** Logged in as "anonymous"'


# To change to the directory in DIRN
try:
    f.cwd(DIRN)
except ftplib.error_perm:
    print 'ERROR: cannot CD to "%s"'  % DIRN
    f.quit()
    print '*** Changed to "%s" folder' % DIRN


# Use the FTP Directory to retrieve KMZ
try:
    f.retrbinary('RETR %s' % FILE, open(FILE, 'wb').write)
except ftplib.error_perm:
    print 'ERROR: cannot read file "%s"' % FILE
    os.unlink(FILE)
else:
    print '*** Downloaded "%s" to CWD' % FILE


# Disconnect from FTP
f.quit()

Here is the full code Thanks.

DanPatterson_Retired

makes no sense, since the whole script can't be seen in context, but whatever your self.sock object is, it is not the correct object type since it doesn't have an attribute called "sendall" the object being returned is "None" and its type is as follows

>>> a = None
>> type(a)
<type 'NoneType'>
>>>

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