for i in range(5):
  print i,

print i,

def func():
  a = 100
  if a > 50:
    b = True
  print b

if __name__ == '__main__':
  func()

def func():
  a = 100
  if a > 50:
    b = True
  print b

if __name__ == '__main__':
  func()
  print b

for i in range(5):
  for j in range(6):
    print (i,j),
  print

import math
cout = 0
for i in range(50,100+1):
  for j in range(2,int(math.sqrt(i))+1):
    if i % j == 0:
      break
  else:
    print i,
    cout +=1
    if cout % 10 == 0:
      cout = 0
      print
    #break #此处不能加break，否则将外面的forbreak，因为此层次的else与第二个for是并排关系

for <> in <对象集合>:
  if <条件1>:
    break
  if <条件2>:
    continue
  <其他语句>
else:
  <...>