Head_First_Python学习笔记(一)

列表操作:

>>> movies= ['the holy grail','the life of brain','the  meaning of life’]
>>> movies.insert(1,1975)
>>> movies.insert(3,1979)
>>> movies.append(1983)
>>> movies
['the holy grail', 1975, 'the life of brain', 1979, 'the meaning of life', 1983]

列表遍历:

>>> for movie in movies:
print movie

>>> count = 0
>>> while count < len(movies):
print movies[count]
count++

SyntaxError: invalid syntax(不支持++)

>>> while count < len(movies):
print movies[count]
count = count + 1

在列表中遍历列表

默认不打印内列表

>>> movies = ['the holy grail', 1975, ['the life of brain', 1979,[ 'the meaning of life', 1983]]]
>>> movies
['the holy grail', 1975, ['the life of brain', 1979,    ['the meaning of life', 1983]]]
>>> for movie in movies:
print movie

the holy grail
1975
['the life of brain', 1979, ['the meaning of life',     1983]]

递归版本

>>> def iter(movies):
for movie in movies:
if isinstance(movie,list):
iter(movie)
else:
print movie

>>> movies
['the holy grail', 1975, ['the life of brain', 1979,    ['the meaning of life', 1983]]]

>>> iter(movies)
the holy grail
1975
the life of brain
1979
the meaning of life
1983