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from sys import stderr, exc_info
from traceback import print_tb
print '\n\n'
print '1 --------------  funtion where exception is printed to the error device  ---------------------'
def power(x,n=0):
    return x ** n
    print power(4, 3)
    print power(4)
except TypeError as err:
    print >>stderr, 'blah blah ....'    # prints on the error device
print '\n\n'
print '2 --------------  function to print entire exception stacktrace  ---------------------'
def power2(x, n):
    return x ** n
    print power2(4, 3)
    print power2(4)
except TypeError as err:
    print err
    print_tb(exc_info()[-1])  # prints entire stack trace
print '\n\n'
print '3 --------------  function with multiple args (*args) ---------------------'
def demo(*args):   # multiple args will become a tuple
    print args
demo('pete')
demo(1, 2.2, 'iii', 4.4, 5.0)
items = [1, 2, 3, 4, 5]
demo(items)                 # list will become the first element of the tuple.
a = (1, 2, 3.3, 4.0, 5.0)
b = [1, 2, 3.3, 4.0, 5.0]
demo(a)  # passing tuple itself
demo(*a) # passing only contents of a tuple or list or string
demo(*'peter') # passing contents of a string
demo(*b)   # passing only contents of a  list
print '\n\n'
print '4 --------------  *args should always be the last argument ---------------------'
def demo(a, b, *args):
    print a
    print b
    print args
demo(1,2,3,4,5)

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