python lists

%d int, %s string, %f/%g floating point
 # % operator
  text = "%d little pigs come out or I'll %s and %s and %s" % 
(3, 'huff', 'puff', 'blow down')


colors = ['red', 'blue', 'green']
print colors[0] 
print colors[2]
print len(colors)

b = colors

squares = [1, 4, 9, 16]
sum = 0
for num in squares:
  sum +=num
print sum

list = ['larry', 'curly', 'moe']
if 'curly in list:
   print 'yay'



num = 1234
lst = [int(i) for i in str(num)]

i= 37107287533902102798797998220837590246510135740250L
>>> lst = [int(j) for j in str(i)]
>>> lst
[3, 7, 1, 0, 7, 2, 8, 7, 5, 3, 3, 9, 0, 2, 1, 0, 2, 7, 9, 8, 7, 9, 7, 9, 9, 8, 2, 2, 0, 8, 3, 7, 5, 9, 0, 2, 4, 6, 5, 1, 0, 1, 3, 5, 7, 4, 0, 2, 5, 0]

http://stackoverflow.com/questions/780390/convert-a-number-to-a-list-of-integers



 range  creates a list holding all the values while  xrange  creates an object that can iterate over the numbers on demand

In python 2**3 equates to pow(2,3)


  
pow
  
xrange
  
str
  

 >>>def main():
    

    total = 0

    for number in xrange(1, 1001):
        total += pow(number, number)
    print(str(total)[-10:])

    
>>> if __name__ == '__main__':
    main()

    
9110846700


__name__ : Every module in Python has a special attribute called __name__. It is a built-in variable that returns the name of the module.

__main__ : Like other programming languages, Python too has an execution entry point i.e. main. 'main' is the name of the scope in which top-level code executes. Basically you have two ways of using a Python module: Run it directly as a script, or import it. When a module is run as a script, its __name__ is set to __main__.

Thus,the value of __name__ attribute is set to __main__ when the module is run as main program. Otherwise the value of __name__ is set to contain the name of the module.

http://stackoverflow.com/questions/419163/what-does-if-name-main-do