hannah dong

$ python
>>> d={}
>>> d['a']='alpha'
>>> d['o']='omega'
>>> d['g']='gamma'
>>> d['a']
'alpha'
>>> d.get(x)
>>> d.get(a)
'alpha'
>>> 'a' in d
True
>>> 'x' in d
False
>>> d.keys()
['a', 'g', 'o']
>>> d.values()
['alpha', 'gamma', 'omega']
>>> for k in sorted(d.keys()): print 'key:', k, '->', d[k]
...
key: a -> alpha
key: g -> gamma
key: o -> omega
>>> d.items()
[('a', 'alpha'), ('g', 'gamma'), ('o', 'omega')]
>>> for tuplein d.items():print tuple
...
('a', 'alpha')
('g', 'gamma')
('o', 'omega')
>>> vi hello.py
import sys
def Cat(filename):
  f=open(filename, 'rU')
  text=f.read()
  print text
  f.close()
  
def main():
  Cat(sys.argv[1])
  
if __name__=='__main__':
  main()
>>> >small.txt
Roses are red
Are belong to you!
>>> python hello.py small.txt
Roses are red
Are belong to you!
>>> 'aaa bbb ccc'.split()
['aaa', 'bbb', 'ccc']