???

?????б???????????????????????????? ?????? ???????????顣???????????????????????????塣?????????????????????????????????????????????????????????????????

??????

??9.2 ??????

#!/usr/bin/python
# Filename: using_tuple.py

zoo = ('wolf', 'elephant', 'penguin')
print 'Number of animals in the zoo is', len(zoo)

new_zoo = ('monkey', 'dolphin', zoo)
print 'Number of animals in the new zoo is', len(new_zoo)
print 'All animals in new zoo are', new_zoo
print 'Animals brought from old zoo are', new_zoo[2]
print 'Last animal brought from old zoo is', new_zoo[2][2]

????????code/using_tuple.py??

???

$ python using_tuple.py
Number of animals in the zoo is 3
Number of animals in the new zoo is 3
All animals in new zoo are ('monkey', 'dolphin', ('wolf', 'elephant', 'penguin'))
Animals brought from old zoo are ('wolf', 'elephant', 'penguin')
Last animal brought from old zoo is penguin

????ι???

????zoo???????飬???????len?????????????????????????????????????????????

????????????????????????????????????????new_zoo?????????Щ???????????????????????????????????????????????????鯔????????????

???????????????????????????????λ??????????????е????????????????б???÷???????????? ???? ??????????????new_zoo[2]??????new_zoo?е??????????????????new_zoo[2][2]??????new_zoo????????????????????????

????0????1?????????顣???????????????????????????myempty = ()??????????е?????????????????????????????????Ψ????????????????????????Python???????????????????????????????????????????????????????2?????????????????singleton = (2 , )??

??Perl??????????
?б???е??б?????????????????б??????Perl????????????????????е???飬???б??е???飬??????е??б??????????????Python??????????????????????洢?????

??????????

???????????÷?????????????У???????????????

??9.3 ?????????

#!/usr/bin/python
# Filename: print_tuple.py

age = 22
name = 'Swaroop'

print '%s is %d years old' % (name, age)
print 'Why is %s playing with that python?' % name

????????code/print_tuple.py??

???

$ python print_tuple.py
Swaroop is 22 years old
Why is Swaroop playing with that python?

????ι???

print????????????%?????????????????????Щ???????????????????????????????????????????????????%s??????????%d????????????????????????????????Щ?????

?????????????????飬???????????%s??????????name??????????е???????????????????????%d??????????????????age??

Python???????????????????е????????????????????????????????滻?????λ?á????%s???滻?????name??????????????

print??????÷?????д?????ü???????????????????????????????????????????????????????

??????????????????%s?????????Python???????????????顣????????????????Ч????????????????????????????????????????????????????????

??????print????У?????????????????????????%?????????????????????????????????????????????????????Ч??