I ran the following program to retrieve entries from the windows
registry on Windows XP:
import win32api, win32con
aReg = win32api.RegCon nectRegistry(No ne,
win32con.HKEY_C URRENT_USER)
aKey = win32api.RegOpe nKeyEx(aReg,
r"Software\Micr osoft\Internet Explorer\PageSe tup")
for i in range(100):
Name, Data, Type = win32api.RegEnu mValue(aKey, i)
print "Index=(", i,") Name=[",
Name,"] Data=[",Data,"]
Type=[",Type,"]"
win32api.RegClo seKey(aKey)
This is the program output:
[code:1:8bb6fccb 25]Index=( 0 ) Name=[ header ]
Data=[ &w&bPage &p of &P ] Type=[ 1
]
Index=( 1 ) Name=[ footer ] Data=[
&u&b&d ] Type=[ 1 ]
Index=( 2 ) Name=[ margin_bottom ] Data=[ 0.750000
] Type=[ 1 ]
Index=( 3 ) Name=[ margin_left ] Data=[ 0.750000
] Type=[ 1 ]
Index=( 4 ) Name=[ margin_right ] Data=[ 0.750000
] Type=[ 1 ]
Index=( 5 ) Name=[ margin_top ] Data=[ 0.750000
] Type=[ 1 ]
Traceback (most recent call last):
File "F:/temp/Python Test Folder/Read Windows Registry
Entries (No error trapping).py", line 5, in -toplevel-
Name, Data, Type = win32api.RegEnu mValue(aKey, i)
error: (259, 'PyRegEnumValue ', 'No more data is
available.')[/code:1:8bb6fccb 25]
I received an error because I tried to read past the last entry for
this key. The following is a modified version of the program to trap
any error on key entry retrieval:
[code:1:8bb6fccb 25]import win32api, win32con, sys
aReg = win32api.RegCon nectRegistry(No ne,
win32con.HKEY_C URRENT_USER)
aKey = win32api.RegOpe nKeyEx(aReg,
r"Software\Micr osoft\Internet Explorer\PageSe tup")
for i in range(100):
try:
Name, Data, Type = win32api.RegEnu mValue(aKey, i)
print "Index=(", i,") Name=[",
Name,"] Data=[",Data,"]
Type=[",Type,"]"
except:
break
win32api.RegClo seKey(aKey)[/code:1:8bb6fccb 25]
This is the program output:
[code:1:8bb6fccb 25]Index=( 0 ) Name=[ header ]
Data=[ &w&bPage &p of &P ] Type=[ 1
]
Index=( 1 ) Name=[ footer ] Data=[
&u&b&d ] Type=[ 1 ]
Index=( 2 ) Name=[ margin_bottom ] Data=[ 0.750000
] Type=[ 1 ]
Index=( 3 ) Name=[ margin_left ] Data=[ 0.750000
] Type=[ 1 ]
Index=( 4 ) Name=[ margin_right ] Data=[ 0.750000
] Type=[ 1 ]
Index=( 5 ) Name=[ margin_top ] Data=[ 0.750000
] Type=[ 1 ][/code:1:8bb6fccb 25]
The latter program will trap any error resulting from trying to
retrieve the key values. What I want to do is to specifically trap
the error denoting that there is no more data available so I can
continue executing more code as oppose to aborting the program. if
the error is something other than no more data available, then I want
to abort the program with an error message.
What code is needed to specifically trap the "no more data is
available" error?
Thank you in advance for your help!
registry on Windows XP:
import win32api, win32con
aReg = win32api.RegCon nectRegistry(No ne,
win32con.HKEY_C URRENT_USER)
aKey = win32api.RegOpe nKeyEx(aReg,
r"Software\Micr osoft\Internet Explorer\PageSe tup")
for i in range(100):
Name, Data, Type = win32api.RegEnu mValue(aKey, i)
print "Index=(", i,") Name=[",
Name,"] Data=[",Data,"]
Type=[",Type,"]"
win32api.RegClo seKey(aKey)
This is the program output:
[code:1:8bb6fccb 25]Index=( 0 ) Name=[ header ]
Data=[ &w&bPage &p of &P ] Type=[ 1
]
Index=( 1 ) Name=[ footer ] Data=[
&u&b&d ] Type=[ 1 ]
Index=( 2 ) Name=[ margin_bottom ] Data=[ 0.750000
] Type=[ 1 ]
Index=( 3 ) Name=[ margin_left ] Data=[ 0.750000
] Type=[ 1 ]
Index=( 4 ) Name=[ margin_right ] Data=[ 0.750000
] Type=[ 1 ]
Index=( 5 ) Name=[ margin_top ] Data=[ 0.750000
] Type=[ 1 ]
Traceback (most recent call last):
File "F:/temp/Python Test Folder/Read Windows Registry
Entries (No error trapping).py", line 5, in -toplevel-
Name, Data, Type = win32api.RegEnu mValue(aKey, i)
error: (259, 'PyRegEnumValue ', 'No more data is
available.')[/code:1:8bb6fccb 25]
I received an error because I tried to read past the last entry for
this key. The following is a modified version of the program to trap
any error on key entry retrieval:
[code:1:8bb6fccb 25]import win32api, win32con, sys
aReg = win32api.RegCon nectRegistry(No ne,
win32con.HKEY_C URRENT_USER)
aKey = win32api.RegOpe nKeyEx(aReg,
r"Software\Micr osoft\Internet Explorer\PageSe tup")
for i in range(100):
try:
Name, Data, Type = win32api.RegEnu mValue(aKey, i)
print "Index=(", i,") Name=[",
Name,"] Data=[",Data,"]
Type=[",Type,"]"
except:
break
win32api.RegClo seKey(aKey)[/code:1:8bb6fccb 25]
This is the program output:
[code:1:8bb6fccb 25]Index=( 0 ) Name=[ header ]
Data=[ &w&bPage &p of &P ] Type=[ 1
]
Index=( 1 ) Name=[ footer ] Data=[
&u&b&d ] Type=[ 1 ]
Index=( 2 ) Name=[ margin_bottom ] Data=[ 0.750000
] Type=[ 1 ]
Index=( 3 ) Name=[ margin_left ] Data=[ 0.750000
] Type=[ 1 ]
Index=( 4 ) Name=[ margin_right ] Data=[ 0.750000
] Type=[ 1 ]
Index=( 5 ) Name=[ margin_top ] Data=[ 0.750000
] Type=[ 1 ][/code:1:8bb6fccb 25]
The latter program will trap any error resulting from trying to
retrieve the key values. What I want to do is to specifically trap
the error denoting that there is no more data available so I can
continue executing more code as oppose to aborting the program. if
the error is something other than no more data available, then I want
to abort the program with an error message.
What code is needed to specifically trap the "no more data is
available" error?
Thank you in advance for your help!