how to continue for loop after exception?
Your own answer is still wrong on quite a few points...
import logging
logger = logging.getLogger(__name__)
def do_connect(self):
"""Connect to all hosts in the hosts list"""
for host in self.hosts:
# this one has to go outside the try/except block
# else `client` might not be defined.
client = paramiko.SSHClient()
try:
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect(host['ip'], port=int(host['port']), username=host['user'], timeout=2)
# you only want to catch specific exceptions here
except paramiko.SSHException as e:
# this will log the full error message and traceback
logger.exception("failed to connect to %(ip)s:%(port)s (user %(user)s)", host)
continue
# here you want a `else` clause not a `finally`
# (`finally` is _always_ executed)
else:
self.connections.append(client)
How to continue a loop after catching exception in try ... except
As suggested by @JonClements what solved my problem was to use error_bad_lines=False
in the pd.read_csv
so it just skipped that lines causing trouble and let me execute the rest of the for loop.
Continue executing loop after catching an exception in try/catch
put your try/catch inside your while loop:
while (option != 0) {
final Scanner keyb = new Scanner(System.in);
System.out.println("");
try {
switch (option) {
}
} catch (Exception InputMismachException) {
System.out.println("\nPlease Enter a Valid Number\n");
option = menuSystem();
}
}
Python: Continue looping after exception
You could handle the exception where it is raised. Also, use a context manager when opening files, it makes for simpler code.
with open(hostsFile, 'r') as f:
for line in f:
line = line.strip()
if not line:
continue
epoch = str(time.time())
try:
conn = urllib.urlopen(line)
print epoch + ": Connection successful, status code for " + line + " is " + str(conn.code) + "\n"
except IOError:
print epoch + ": Connection unsuccessful, unable to connect to server, potential routing issues\n"
Continue a while loop after exception
From http://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html#nextInt%28int%29 :
"If the translation is successful, the scanner advances past the input that matched."
Ah, but what if the translation is not successful? In that case, the scanner does not advance past any input. The bad input data remains as the next thing to be scanned, so the next iteration of the loop will fail just like the previous one--the loop will keep trying to read the same bad input over and over.
To prevent an infinite loop, you have to advance past the bad data so that you can get to something the scanner can read as an integer. The code snippet below does this by calling input.next():
Scanner input = new Scanner(System.in);
while(true){
try {
int choice = input.nextInt();
System.out.println("Input was " + choice);
} catch (InputMismatchException e){
String bad_input = input.next();
System.out.println("Bad input: " + bad_input);
continue;
}
}
Continue for loop after exception java
You want to use try
catch
blocks to do this, like so
for (int i = 0; i < Recipients_To.length; i++)
{
try {
message.setRecipients(Message.RecipientType.TO,Recipients_To[i].toString());
Transport.send(message);
}
catch (YourException e){
//Do some thing to handle the exception
}
}
This catches the potential issue and will still continue with the for loop once the exception has been handled.
Catch exception and continue try block in Python
No, you cannot do that. That's just the way Python has its syntax. Once you exit a try-block because of an exception, there is no way back in.
What about a for-loop though?
funcs = do_smth1, do_smth2
for func in funcs:
try:
func()
except Exception:
pass # or you could use 'continue'
Note however that it is considered a bad practice to have a bare except
. You should catch for a specific exception instead. I captured for Exception
because that's as good as I can do without knowing what exceptions the methods might throw.
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