Циклы с параметром

2.6.1.py

# -*- encoding: utf-8 -*-
"""
Итерация по списку
"""

words = ['A', 'B', 'C', 'D', 'E']
for word in words:
    print word

2.6.2.py

# -*- encoding: utf-8 -*-
"""
Итерация по словарю
"""

dict = {'x': 1, 'y': 2, 'z': 3}
for key in dict:
    print key, 'corresponds to', dict[key]

2.6.3.py

# -*- encoding: utf-8 -*-
"""
Использование функции range()
"""

from math import sqrt

for n in range(99, 0, -1):
    root = sqrt(n)
    if root == int(root):
        print n
        break

2.6.4.py

# -*- encoding: utf-8 -*-
"""
Подсчёт сложных процентов
"""

principal = 1000.0   # starting principal
rate = .05           # interest rate

print "Year %21s" % "Amount on deposit" 

for year in range( 1, 11 ):
   amount = principal * ( 1.0 + rate ) ** year
   print "%4d%21.2f" % ( year, amount )