To find the function of a module

import math            # Imports the math module
everything = dir(math) # Sets everything to a list of things from math
print everything       # Prints 'em all!



['__doc__', '__name__', '__package__', 'acos', 'acosh', 'asin', 'asinh', 'atan', 'atan2', 'atanh', 'ceil', 'copysign', 'cos', 'cosh', 'degrees', 'e', 'erf', 'erfc', 'exp', 'expm1', 'fabs', 'factorial', 'floor', 'fmod', 'frexp', 'fsum', 'gamma', 'hypot', 'isinf', 'isnan', 'ldexp', 'lgamma', 'log', 'log10', 'log1p', 'modf', 'pi', 'pow', 'radians', 'sin', 'sinh', 'sqrt', 'tan', 'tanh', 'trunc']
None

Some common program of C in python part-1

Printing the series of  "*":-


Desired Output :

*
**
***
****
*****

Hey , the series of stars is common program in C ??

for number in range(1,6):
...     for k in range (0,number):
...             print ("*"),
...     print(' ')
...

printf format string in Python

The format operator, % allows us to construct strings, replacing parts of the
strings with the data stored in variables.  But when the first operand is a string, % is the format operator.
The first operand is the format string, which contains one or more format sequences that specify how the second operand is formatted. The result is a string.
For example, the format sequence '%d' means that the second operand should be
formatted as an integer (d stands for “decimal”):
>>> camels = 42
>>> '%d' % camels
'42'
The difference in python and c for print function is that python uses % operator again before variable names

e.g.

IN C language>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
int num= 3;
float rate = 3.2;
char letter = 'A';

printf("%d, %f, %c" num, rate, letter);

output:--

3,3.2,A


IN Python >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

 num= 3
 rate = 3.2
letter = 'A'

print "%d %f %c" %(num, rate, letter)

output:--

3,3.2,A

for more about formated string refer this 

Error while using input() function

 Error while using input() function :---

#!/usr/bin/python
print ('Hello! What is your name?')
myName = input()

 Output:-
 Hello world!
What is your name?
Aman
Traceback (most recent call last):
File "C:/Python24/game.py", line 3, in <module>
myName = input()
File "<string>", line 1, in <module>
NameError: name 'Aman' is not defined


...then this means you are running the program with Python 2, instead of Python 3.

The input() and raw_input() Functions
In Python 2, the function to get input from the keyboard is raw_input(). In Python 3, the input() function does this. You can simply rename the function wherever it appears in your code.
>>> # Python 2
>>> name = raw_input()
>>> # Python 3
>>> name = input()

#!/usr/bin/python
print ('Hello! What is your name?')
myName = raw_input()

Sockets and Ports

A port can be viewed as a rendezvous point between TCP and the application. However, the port is a part of the operating system and the application program can not directly access the port.

• TCP puts the data in the right port (mail box).
• The socket transports the data between the port (mail box) and the application.

New to Python but not to programming!!!!!!!

Yes we all knows python is something that exists among various computer languages, but if you want to start python and you are somewhat not a good programmer even if you can start to learn Python.

But all before you would be curious to know what is application of Python that makes it different than others.

If you do much work on computers, eventually you find that there’s some task you’d like to automate. For example, you may wish to perform a search-and-replace over a large number of text files, or rename and rearrange a bunch of photo files in a complicated way. Perhaps you’d like to write a small custom database, or a specialized GUI application, or a simple game.
If you’re a professional software developer, you may have to work with several C/C++/Java libraries but find the usual write/compile/test/re-compile cycle is too slow. Perhaps you’re writing a test suite for such a library and find writing the testing code a tedious task. Or maybe you’ve written a program that could use an extension language, and you don’t want to design and implement a whole new language for your application.
Python is just the language for you.