大数据学习笔记6：python 基础学习三 if for while

 python 基础学习三  if for while

 

#!/usr/bin/python

#if

a=2
if a > 1 :
    print "a>1"
elif a == 1:
    print "a==1"
else:
    print "a<1"

# for
aList = []
aList.append("a")
aList.append("d")
aList.append("b")
aList.append("c")

for v in aList:
    print v


b_dict = {}
b_dict["a"]="1"
b_dict["b"]="2"
b_dict["c"]="3"
b_dict["d"]="4"

for k , v in b_dict.items():
    print k + "--->" +v

# set
c_set = set()
c_set.add("a")
c_set.add("b")
c_set.add("c")

for v in c_set:
    print v


sum = 0
for i in range(1,10):
   sum = sum + i

print sum


# while
e = 3
while e > 0 :
    print "e --->" + str(e)
    e = e-1


f = 1
while f< 10 :
    f = f + 1
    if f % 2 == 0 :
        print f
    else:
        continue