python条件判断

a= 1
if a>10:
    print 'a大于10'
print 'a小于10'


a = -20
if a > 10:
    print ('a > 10')
elif a==0:
    print 'a is 0'
else:
    print 'a is fushu'

x = 10
while x >0:
    print '22222'
    x-=1

abc = 10
while abc > 0:
    print ('abc = %s' % abc)
    abc -= 1

a = dict(a=1,b=2,c=3)
print a
for i,j in a.items():
    print (i,j)

x = ['a','b','c']
for k,v in enumerate(x):
    print (k,v)

for i in range(1,11):
    for k in range(1,i):
        print k,
        k +=1
    i +=1
    print "\n",

print (range(10))
print (xrange(10))
for x in xrange(10):
    print (x)

for i in xrange(1,5):
    print ('a='+str(i))

for i in xrange(11):
    if i >= 3:
        i+=1
        print ('hello')
        continue
    if i == 4:
        break
    print ('i = %d' %i)

for num in range(10,20):  # 迭代 10 到 20 之间的数字
   for i in range(2,num): # 根据因子迭代
      if num%i == 0:      # 确定第一个因子
         j=num/i          # 计算第二个因子
         print '%d 等于 %d * %d' % (num,i,j)
         break            # 跳出当前循环
   else:                  # 循环的 else 部分
      print num, '是一个质数'