本文整理汇总了Python中six.moves.filterfalse方法的典型用法代码示例。如果您正苦于以下问题:Python moves.filterfalse方法的具体用法?Python moves.filterfalse怎么用?Python moves.filterfalse使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类six.moves
的用法示例。
在下文中一共展示了moves.filterfalse方法的11个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: _unique_everseen
# 需要导入模块: from six import moves [as 别名]
# 或者: from six.moves import filterfalse [as 别名]
def _unique_everseen(iterable, key=None):
"List unique elements, preserving order. Remember all elements ever seen."
# unique_everseen('AAAABBBCCDAABBB') --> A B C D
# unique_everseen('ABBCcAD', str.lower) --> A B C D
seen = set()
seen_add = seen.add
if key is None:
for element in filterfalse(seen.__contains__, iterable):
seen_add(element)
yield element
else:
for element in iterable:
k = key(element)
if k not in seen:
seen_add(k)
yield element
示例2: _unique_everseen
# 需要导入模块: from six import moves [as 别名]
# 或者: from six.moves import filterfalse [as 别名]
def _unique_everseen(self, iterable, key=None):
"""
List unique elements, preserving order.
Remember all elements ever seen.
_unique_everseen('AAAABBBCCDAABBB') --> A B C D
_unique_everseen('ABBCcAD', str.lower) --> A B C D
"""
seen = set()
seen_add = seen.add
if key is None:
for element in filterfalse(seen.__contains__, iterable):
seen_add(element)
yield element
else:
for element in iterable:
k = key(element)
if k not in seen:
seen_add(k)
yield element
示例3: partition
# 需要导入模块: from six import moves [as 别名]
# 或者: from six.moves import filterfalse [as 别名]
def partition(pred, iterable):
"""
Returns a 2-tuple of iterables derived from the input iterable.
The first yields the items that have ``pred(item) == False``.
The second yields the items that have ``pred(item) == True``.
>>> is_odd = lambda x: x % 2 != 0
>>> iterable = range(10)
>>> even_items, odd_items = partition(is_odd, iterable)
>>> list(even_items), list(odd_items)
([0, 2, 4, 6, 8], [1, 3, 5, 7, 9])
"""
# partition(is_odd, range(10)) --> 0 2 4 6 8 and 1 3 5 7 9
t1, t2 = tee(iterable)
return filterfalse(pred, t1), filter(pred, t2)
示例4: find
# 需要导入模块: from six import moves [as 别名]
# 或者: from six.moves import filterfalse [as 别名]
def find(cls, where='.', exclude=(), include=('*', )):
"""Return a list all Python packages found within directory 'where'
'where' should be supplied as a "cross-platform" (i.e. URL-style)
path; it will be converted to the appropriate local path syntax.
'exclude' is a sequence of package names to exclude; '*' can be used
as a wildcard in the names, such that 'foo.*' will exclude all
subpackages of 'foo' (but not 'foo' itself).
'include' is a sequence of package names to include. If it's
specified, only the named packages will be included. If it's not
specified, all found packages will be included. 'include' can contain
shell style wildcard patterns just like 'exclude'.
The list of included packages is built up first and then any
explicitly excluded packages are removed from it.
"""
out = cls._find_packages_iter(convert_path(where))
out = cls.require_parents(out)
includes = cls._build_filter(*include)
excludes = cls._build_filter('ez_setup', '*__pycache__', *exclude)
out = filter(includes, out)
out = filterfalse(excludes, out)
return list(out)
示例5: drop
# 需要导入模块: from six import moves [as 别名]
# 或者: from six.moves import filterfalse [as 别名]
def drop(self, pred):
"""Drop items for which pred(item) evaluates to True.
Note: returns self so it can be chained with other filters, e.g.,
newseq = seq.select(...).drop(...).transform(...)
"""
# self._iter = (i for i in self if not pred(i))
self._iter = filterfalse(pred, self._iter)
return self
示例6: __iter__
# 需要导入模块: from six import moves [as 别名]
# 或者: from six.moves import filterfalse [as 别名]
def __iter__(self):
if self.cache_location is not None:
filenames = iglob(self.filename('*'))
keys = map(lambda f: os.path.splitext(os.path.basename(f))[0], filenames)
new_keys = filterfalse(lambda key: key in self._cache.keys(), keys)
return chain(iterkeys(self._cache), new_keys)
else:
return iterkeys(self._cache)
示例7: _candidate_dirs
# 需要导入模块: from six import moves [as 别名]
# 或者: from six.moves import filterfalse [as 别名]
def _candidate_dirs(base_path):
"""
Return all dirs in base_path that might be packages.
"""
has_dot = lambda name: '.' in name
for root, dirs, files in os.walk(base_path, followlinks=True):
# Exclude directories that contain a period, as they cannot be
# packages. Mutate the list to avoid traversal.
dirs[:] = filterfalse(has_dot, dirs)
for dir in dirs:
yield os.path.relpath(os.path.join(root, dir), base_path)
示例8: partition
# 需要导入模块: from six import moves [as 别名]
# 或者: from six.moves import filterfalse [as 别名]
def partition(pred, iterable):
"""
Partition the iterable into two disjoint entries based
on the predicate.
@return: Tuple (iterable1, iterable2)
"""
iter1, iter2 = itertools.tee(iterable)
return filterfalse(pred, iter1), filter(pred, iter2)
示例9: test_filter_false
# 需要导入模块: from six import moves [as 别名]
# 或者: from six.moves import filterfalse [as 别名]
def test_filter_false():
from six.moves import filterfalse
f = filterfalse(lambda x: x % 3, range(10))
assert six.advance_iterator(f) == 0
assert six.advance_iterator(f) == 3
assert six.advance_iterator(f) == 6
示例10: dfilter
# 需要导入模块: from six import moves [as 别名]
# 或者: from six.moves import filterfalse [as 别名]
def dfilter(content, blacklist=None, inverse=False):
""" Filters content
Args:
content (dict): The content to filter
blacklist (Seq[str]): The fields to remove (default: None)
inverse (bool): Keep fields instead of removing them (default: False)
See also:
`meza.process.cut`
Returns:
dict: The filtered content
Examples:
>>> content = {'keep': 'Hello', 'strip': 'World'}
>>> dfilter(content) == {'keep': 'Hello', 'strip': 'World'}
True
>>> dfilter(content, ['strip']) == {'keep': 'Hello'}
True
>>> dfilter(content, ['strip'], True) == {'strip': 'World'}
True
"""
blackset = set(blacklist or [])
func = filterfalse if inverse else filter
return dict(func(lambda x: x[0] not in blackset, content.items()))
示例11: to_datetime
# 需要导入模块: from six import moves [as 别名]
# 或者: from six.moves import filterfalse [as 别名]
def to_datetime(content, dt_format=None, warn=False):
"""Parses and formats strings into datetimes.
Args:
content (str): The string to parse.
dt_format (str): Date format passed to `strftime()`
(default: None).
warn (bool): raise error if content can't be safely converted
(default: False)
Returns:
obj: The datetime object or formatted datetime string.
See also:
`meza.process.type_cast`
Examples:
>>> fmt = '%Y-%m-%d %H:%M:%S'
>>> to_datetime('5/4/82 2:00 pm')
datetime.datetime(1982, 5, 4, 14, 0)
>>> to_datetime('5/4/82 10:00', fmt) == '1982-05-04 10:00:00'
True
>>> to_datetime('2/32/82 12:15', fmt) == '1982-02-28 12:15:00'
True
>>> to_datetime('spam')
datetime.datetime(9999, 12, 31, 0, 0)
>>> to_datetime('spam', warn=True)
Traceback (most recent call last):
ValueError: Invalid datetime value: `spam`.
Returns:
datetime
"""
bad_nums = map(str, range(29, 33))
good_nums = map(str, range(31, 27, -1))
try:
bad_num = next(x for x in bad_nums if x in content)
except StopIteration:
options = [content]
else:
possibilities = (content.replace(bad_num, x) for x in good_nums)
options = it.chain([content], possibilities)
# Fix impossible dates, e.g., 2/31/15
results = filterfalse(lambda x: x[1], map(_to_datetime, options))
value = next(results)[0]
if warn and value == DEFAULT_DATETIME:
raise ValueError('Invalid datetime value: `{}`.'.format(content))
else:
datetime = value.strftime(dt_format) if dt_format else value
return datetime