Exception Handling :
After Exception Catch Python will execute remaining code, See below Example
#!/usr/bin/python3
# reading sitemap xml file
#
a=5
def diverror(a):
a = a/0
print(a)
try:
diverror(a)
except:
print("Division Error")
a = a+10
print(a)
Output:
Division Error
15
...
Wednesday, 28 November 2012
Break out of the function in Python
In Python if Any function return any thing or return none means the function is completed ie Break out of the function
Example:
def test(a,b):
return "HI Closed"
a = b+10
print(a)
test(10,11)
output:
HI Close...
Catch all exception in Python3
to catch all exceptions in python3 simple do like bellow
try:
code
except:
print("Unknown Exception found"...
Sunday, 25 November 2012
Python current timestamp
To get current time with date in python
from datetime import datetime
curtime = str(datetime.now())
output : '2012-11-25 14:58:30.465213'
...
Friday, 23 November 2012
Solution: Extract tar.bz2 files in Linux
To Extract tar.bz2 files in linux use below command
root@system1~# tar -xjvf filename.tar.b...
Wednesday, 21 November 2012
Delete duplicate rows in mysql table
It is Possible to DELETE duplicate rows in MYSQL table based on Particular Field (Coloumn)
the SQL Query is
ALTER IGNORE TABLE table_name ADD UNIQUE INDEX(coloumn_name);&nbs...
Thursday, 15 November 2012
IPtables: Saving firewall rules to /etc/sysconfig/iptables: /etc/init.d/iptables: line 268: restorecon: command not found
Solution to : IPtables: Saving firewall rules to /etc/sysconfig/iptables: /etc/init.d/iptables: line 268: restorecon: command not found
root@server1:~# ls -l /sbin/ | grep restore
lrwxrwxrwx 1 root root 14 May 23 17:52 iptables-restore -> iptables-multi
Means policycoreutils not Installed
So Install policycoreutils...
Tuesday, 13 November 2012
Read Large Files Line by Line in Python - Best Way
The readlines() function loads the entire file into memory as it runs. A better approach for large files is to use the fileinput module, as follows:import fileinputfor line in fileinput.input(['myfile']): print(lin...
Monday, 12 November 2012
Solution: Dovecot error : Unknown database driver mysql
Dovecot error : Unknown database driver mysql because Dovecot requires the dovecot-mysql package to run mysql authentication. So Install dovecot-mysql
yum install dovecot-mysq...
Friday, 9 November 2012
Load Kernel Module in Linux Example Load IP table module
Below Instructions shows How to Load Kernel module in Linux
check whether module is Loaded or Not
if you don't know Exact Module Name then Check All Loaded Modules
root@system1:~# lsmod
Module Size Used by
nf_conntrack_ipv4 18850...
Tuesday, 6 November 2012
Solution to g++: Command not found in Fedora Problem
g++ command not found means gcc-c++ package not
installed so install gcc-c++ package
command
root@system1:# yum install gcc-c...
Install deb packages
To install .deb packages use following command
root@system1:~# dpkg -i package.d...
SSH login without password in Linux
Hi to login into Linux System through SSH with out password Follow Below Steps
two systems (Below IP addresses are for Example)
system1 ip : 2.2.2.2
system2 ip : 3.3.3.3
Note: For Below Command don't type any thing Simply press Enter
root@system1:~# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in...
Monday, 5 November 2012
convert to binary in PHP
In PHP decbin function is used to convert anything to binary
Example:
<?php
$a = "3";
$b = 4;
echo decbin($a)."<br>";
echo decbin($b);
?>
Output:
11
1...
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