|
我也在用这本书入门
贴一下我的代码
这是扫描器
- lexicon = {
- 'north': ('direction', 'north'),
- 'south': ('direction', 'south'),
- 'east': ('direction', 'east'),
- 'west': ('direction', 'west'),
-
- 'go': ('verb', 'go'),
- 'kill': ('verb', 'kill'),
- 'eat': ('verb', 'eat'),
-
- 'the': ('stop', 'the'),
- 'in': ('stop', 'in'),
- 'of': ('stop', 'of'),
-
- 'bear': ('noun', 'bear'),
- 'princess': ('noun', 'princess'),
- }
-
- def isnum(Num):
- try:
- return int(Num)
- except:
- return None
- def scan(sentence):
- words = sentence.split()
- result = []
-
- for word in words:
- if isnum(word):
- result.append(('number', int(word)))
- elif word in lexicon.keys():
- result.append(lexicon[word])
- else:
- result.append(('error', word))
- return result
复制代码
下面是测试代码
- from nose.tools import *
- from ex48 import lexicon
- def test_direction():
- assert_equal(lexicon.scan("north"), [('direction', 'north')])
- result = lexicon.scan("north south east")
- assert_equal(result, [('direction', 'north'),
- ('direction', 'south'),
- ('direction', 'east')])
-
- def test_verbs():
- assert_equal(lexicon.scan("go"), [('verb', 'go')])
- result = lexicon.scan("go kill eat")
- assert_equal(result, [('verb', 'go'),
- ('verb', 'kill'),
- ('verb', 'eat')])
-
- def test_stops():
- assert_equal(lexicon.scan("the"), [('stop', 'the')])
- result = lexicon.scan("the in of")
- assert_equal(result, [('stop', 'the'),
- ('stop', 'in'),
- ('stop', 'of')])
-
-
- def test_noun():
- assert_equal(lexicon.scan("bear"), [('noun', 'bear')])
- result = lexicon.scan("bear princess")
- assert_equal(result, [('noun', 'bear'),
- ('noun', 'princess')])
- def test_numbers():
- assert_equal(lexicon.scan("1234"), [('number', 1234)])
- result = lexicon.scan("3 91234")
- assert_equal(result, [('number', 3),
- ('number', 91234)])
- def test_errors():
- assert_equal(lexicon.scan("ASDFAFASDF"),[('error', 'ASDFAFASDF')])
- result = lexicon.scan("bear IAS princess")
- assert_equal(result, [('noun', 'bear'),
- ('error', 'IAS'),
- ('noun', 'princess')])
复制代码 |
|