python 学习之hello world

Created on 2013-8-22

@author: hbjava1985
'''
print 'hello world!'
print "hello world!"
print 'hello %s!' % ('world')
a = 1; b = 2
if(a == b) :
    print 'a == b'
elif (a > b) :
    print 'a > b'
elif (a < b) :
    print 'a < b'
else :
    print '#@)#$'
array = [1, 2, 3, 4]
total = 0
for a in array:
    total += a
print total
while 1 > 2:
    pass
print set([1, 2, 3, 4, 4])

set1 = set([1, 2, 3, 4, 5])
set2 = set([2, 3, 4, 5, 6])
print set1 - set2  
print set1 & set2  
print set1 | set2

dict = {}
dict['zs'] = 21
dict['ls'] = 25
dict['ww'] = 22

for key in dict.keys():
    print '%s %d' % (key, dict[key])
    
    
def main():
    pass

if __name__ == '__main__':
    main()

f = file("c:/client_log.txt","r") 
print f.read()
f.close()

with open("c:/client_log.txt","r") as f:
    print f.read()

with open("c:/yy.txt","w") as f:
    f.write("i'am OK!")

'''