def test_ngrams_order_2():
lst = "a b c".split()
actual = list(ngrams(lst, 2))
expected = ["a", "a b",
"b", "b c",
"c"]
assert_equal(expected, actual)
def test_ngrams_order_3():
tokens = "a b c".split()
actual = list(ngrams(tokens, 3))
expected = ["a", "a b", "a b c",
"b", "b c",
"c"]
assert_equal(expected, actual)
def test_ngrams_order_none():
# same result as test_ngrams_order_3...
tokens = "a b c".split()
actual = list(ngrams(tokens, None))
expected = ["a", "a b", "a b c",
"b", "b c",
"c"]
assert_equal(expected, actual)
def test_ngrams_order_4():
# same result as test_ngrams_order_3...
lst = "a b c".split()
actual = list(ngrams(lst, 4))
expected = ["a", "a b", "a b c",
"b", "b c",
"c"]
assert_equal(expected, actual)
def test_ngrams():
text = "Hello , world !".split()
expected = {"Hello , world", ", world !",
"Hello ,", ", world", "world !",
"Hello", ",", "world", "!"}
ng = Counter(ngrams(text, 3))
assert_equal(set(ng), expected)
assert_true(all(freq == 1 for freq in ng.values()))
with_pos = list(ngrams_with_pos(text, 2))
assert_in((0, 2, 'Hello ,'), with_pos)
assert_in((1, 3, ', world'), with_pos)
def page_statistics(page, N, sentence_splitter=None, tokenizer=None):
"""Gather statistics from a single WP page.
The sentence_splitter should be a callable that splits text into sentences.
It defaults to an unspecified heuristic.
See ``parse_dump`` for the parameters.
Returns
-------
stats : (dict, dict)
The first dict maps (target, anchor) pairs to counts.
The second maps n-grams (up to N) to counts.
"""
if N is not None and not isinstance(N, int):
raise TypeError("expected integer or None for N, got %r" % N)
clean = clean_text(page)
link_counts = Counter(extract_links(clean))
if N:
no_links = remove_links(clean)
if sentence_splitter is None:
sentences = re.split(r'(?:\n{2,}|\.\s+)', no_links,
re.MULTILINE | re.UNICODE)
else:
sentences = [
sentence for paragraph in re.split('\n+', no_links)
for sentence in paragraph
]
if tokenizer is None:
tokenizer = re.compile(r'\w+', re.UNICODE).findall
all_ngrams = chain.from_iterable(
ngrams(tokenizer(sentence), N) for sentence in sentences)
ngram_counts = Counter(all_ngrams)
else:
ngram_counts = None
return link_counts, ngram_counts
def page_statistics(page, N, sentence_splitter=None, tokenizer=None):
"""Gather statistics from a single WP page.
The sentence_splitter should be a callable that splits text into sentences.
It defaults to an unspecified heuristic.
See ``parse_dump`` for the parameters.
Returns
-------
stats : (dict, dict)
The first dict maps (target, anchor) pairs to counts.
The second maps n-grams (up to N) to counts.
"""
if N is not None and not isinstance(N, int):
raise TypeError("expected integer or None for N, got %r" % N)
clean = clean_text(page)
link_counts = Counter(extract_links(clean))
if N:
no_links = remove_links(clean)
if sentence_splitter is None:
sentences = re.split(r'(?:\n{2,}|\.\s+)', no_links,
re.MULTILINE | re.UNICODE)
else:
sentences = [sentence
for paragraph in re.split('\n+', no_links)
for sentence in paragraph]
if tokenizer is None:
tokenizer = re.compile(r'\w+', re.UNICODE).findall
all_ngrams = chain.from_iterable(ngrams(tokenizer(sentence), N)
for sentence in sentences)
ngram_counts = Counter(all_ngrams)
else:
ngram_counts = None
return link_counts, ngram_counts
def test_ngrams_order_empty_list():
no_tokens = []
actual = list(ngrams(no_tokens, None))
expected = []
assert_equal(expected, actual)
def test_ngrams_order_1():
tokens = "a b c".split()
actual = list(ngrams(tokens, 1))
expected = tokens
assert_equal(expected, actual)
def test_ngrams_order_1():
lst = "a b c".split()
actual = list(ngrams(lst, 1))
expected = lst
assert_equal(expected, actual)
