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def get_3_tuple_list(self,obj,default=None):
"""Return list of 3-tuples from
sequence of a sequence,
sequence - it is mapped to sequence of 3-sequences if possible
number
"""
if is_sequence2(obj):
return [self.get_3_tuple(o,default) for o in obj]
elif ... |
def get_3_3_tuple(self,obj,default=None):
"""Return tuple of 3-tuples
"""
if is_sequence2(obj):
ret = []
for i in range(3):
if i<len(obj):
ret.append(self.get_3_tuple(obj[i],default))
else:
ret.append... |
def get_3_3_tuple_list(self,obj,default=None):
"""Return list of 3x3-tuples.
"""
if is_sequence3(obj):
return [self.get_3_3_tuple(o,default) for o in obj]
return [self.get_3_3_tuple(obj,default)] |
def connect(self):
"""Iterate through the application configuration and instantiate
the services.
"""
requested_services = set(
svc.lower() for svc in current_app.config.get('BOTO3_SERVICES', [])
)
region = current_app.config.get('BOTO3_REGION')
sess_... |
def clients(self):
"""
Get all clients (with and without associated resources)
"""
clients = {}
for k, v in self.connections.items():
if hasattr(v.meta, 'client'): # has boto3 resource
clients[k] = v.meta.client
else: ... |
def init_kerberos(app, service='HTTP', hostname=gethostname()):
'''
Configure the GSSAPI service name, and validate the presence of the
appropriate principal in the kerberos keytab.
:param app: a flask application
:type app: flask.Flask
:param service: GSSAPI service name
:type service: str... |
def date_to_timestamp(date):
"""
date to unix timestamp in milliseconds
"""
date_tuple = date.timetuple()
timestamp = calendar.timegm(date_tuple) * 1000
return timestamp |
def random_date(dt_from, dt_to):
"""
This function will return a random datetime between two datetime objects.
:param start:
:param end:
"""
delta = dt_to - dt_from
int_delta = (delta.days * 24 * 60 * 60) + delta.seconds
random_second = randrange(int_delta)
return dt_from + datetime.... |
def object_to_json(obj, indent=2):
"""
transform object to json
"""
instance_json = json.dumps(obj, indent=indent, ensure_ascii=False, cls=DjangoJSONEncoder)
return instance_json |
def qs_to_json(qs, fields=None):
"""
transform QuerySet to json
"""
if not fields :
fields = [f.name for f in qs.model._meta.fields]
# сформируем список для сериализации
objects = []
for value_dict in qs.values(*fields):
# сохраним порядок полей, как определено в моделе
... |
def mongoqs_to_json(qs, fields=None):
"""
transform mongoengine.QuerySet to json
"""
l = list(qs.as_pymongo())
for element in l:
element.pop('_cls')
# use DjangoJSONEncoder for transform date data type to datetime
json_qs = json.dumps(l, indent=2, ensure_ascii=False, cls=DjangoJSO... |
def url_path(request, base_url=None, is_full=False, *args, **kwargs):
"""
join base_url and some GET-parameters to one; it could be absolute url optionally
usage example:
c['current_url'] = url_path(request, use_urllib=True, is_full=False)
...
<a href="{{ current_url }}">Лабораторн... |
def url_params(request, except_params=None, as_is=False):
"""
create string with GET-params of request
usage example:
c['sort_url'] = url_params(request, except_params=('sort',))
...
<a href="{{ sort_url }}&sort=lab_number">Лабораторный номер</a>
"""
if not request.GET:
... |
def prepare_sort_params(params, request, sort_key='sort', revers_sort=None, except_params=None):
"""
Prepare sort params. Add revers '-' if need.
Params:
params - list of sort parameters
request
sort_key
revers_sort - list or set with keys that need re... |
def sort_key_process(request, sort_key='sort'):
"""
process sort-parameter value (for example, "-name")
return:
current_param - field for sorting ("name)
current_reversed - revers flag (True)
"""
current = request.GET.get(sort_key)
current_reversed = False
cur... |
def transform_form_error(form, verbose=True):
"""
transform form errors to list like
["field1: error1", "field2: error2"]
"""
errors = []
for field, err_msg in form.errors.items():
if field == '__all__': # general errors
errors.append(', '.join(err_msg))
else... |
def process_date_from_to_options(options, to_datetime=False, default_dt_to=False):
"""
to_datetime - приводить ли date к datetime
default_dt_to - устанавливать заведомо будущее дефолтное значение для dt_to
"""
start_time = datetime.datetime.now()
if options.get('last_week'):
dt_... |
def _chunked(iterable, n):
"""
Collect data into chunks of up to length n.
:type iterable: Iterable[T]
:type n: int
:rtype: Iterator[list[T]]
"""
it = iter(iterable)
while True:
chunk = list(islice(it, n))
if chunk:
yield chunk
else:
return |
def get(self, names, country_id=None, language_id=None, retheader=False):
"""
Look up gender for a list of names.
Can optionally refine search with locale info.
May make multiple requests if there are more names than
can be retrieved in one call.
:param names: List of na... |
def get1(self, name, **kwargs):
"""
Look up gender for a single name.
See :py:meth:`get`.
Doesn't support retheader option.
"""
if 'retheader' in kwargs:
raise GenderizeException(
"get1() doesn't support the retheader option.")
return s... |
def saveVarsInMat(filename, varNamesStr, outOf=None, **opts):
"""Hacky convinience function to dump a couple of python variables in a
.mat file. See `awmstools.saveVars`.
"""
from mlabwrap import mlab
filename, varnames, outOf = __saveVarsHelper(
filename, varNamesStr, outOf, '.mat', **op... |
def _make_proxy(self, varname, parent=None, constructor=MlabObjectProxy):
"""Creates a proxy for a variable.
XXX create and cache nested proxies also here.
"""
# FIXME why not just use gensym here?
proxy_val_name = "PROXY_VAL%d__" % self._proxy_count
self._proxy_count +=... |
def _do(self, cmd, *args, **kwargs):
"""Semi-raw execution of a matlab command.
Smartly handle calls to matlab, figure out what to do with `args`,
and when to use function call syntax and not.
If no `args` are specified, the ``cmd`` not ``result = cmd()`` form is
used in Matlab... |
def _get(self, name, remove=False):
r"""Directly access a variable in matlab space.
This should normally not be used by user code."""
# FIXME should this really be needed in normal operation?
if name in self._proxies: return self._proxies[name]
varname = name
vartype = s... |
def _set(self, name, value):
r"""Directly set a variable `name` in matlab space to `value`.
This should normally not be used in user code."""
if isinstance(value, MlabObjectProxy):
mlabraw.eval(self._session, "%s = %s;" % (name, value._name))
else:
## mlabraw.put... |
def open(self, visible=False):
""" Dispatches the matlab COM client.
Note: If this method fails, try running matlab with the -regserver flag.
"""
if self.client:
raise MatlabConnectionError('Matlab(TM) COM client is still active. Use close to '
'close it')
self.client = ... |
def eval(self, expression, identify_erros=True):
""" Evaluates a matlab expression synchronously.
If identify_erros is true, and the last output line after evaluating the
expressions begins with '???' an excpetion is thrown with the matlab error
following the '???'.
The return value of the function... |
def get(self, names_to_get, convert_to_numpy=True):
""" Loads the requested variables from the matlab com client.
names_to_get can be either a variable name or a list of variable names.
If it is a variable name, the values is returned.
If it is a list, a dictionary of variable_name -> value is returned... |
def put(self, name_to_val):
""" Loads a dictionary of variable names into the matlab com client.
"""
self._check_open()
for name, val in name_to_val.iteritems():
# First try to put data as a matrix:
try:
self.client.PutFullMatrix(name, 'base', val, None)
except:
self.cl... |
def open():
global _MATLAB_RELEASE
'''Opens MATLAB using specified connection (or DCOM+ protocol on Windows)where matlab_location '''
if is_win:
ret = MatlabConnection()
ret.open()
return ret
else:
if settings.MATLAB_PATH != 'guess':
matlab_path = settings.MA... |
def _list_releases():
'''
Tries to guess matlab process release version and location path on
osx machines.
The paths we will search are in the format:
/Applications/MATLAB_R[YEAR][VERSION].app/bin/matlab
We will try the latest version first. If no path is found, None is reutrned.
'''
if... |
def is_valid_release_version(version):
'''Checks that the given version code is valid.'''
return version is not None and len(version) == 6 and version[0] == 'R' \
and int(version[1:5]) in range(1990, 2050) \
and version[5] in ('h', 'g', 'f', 'e', 'd', 'c', 'b', 'a') |
def find_matlab_version(process_path):
""" Tries to guess matlab's version according to its process path.
If we couldn't gues the version, None is returned.
"""
bin_path = os.path.dirname(process_path)
matlab_path = os.path.dirname(bin_path)
matlab_dir_name = os.path.basename(matlab_path)
v... |
def open(self, print_matlab_welcome=False):
'''Opens the matlab process.'''
if self.process and not self.process.returncode:
raise MatlabConnectionError('Matlab(TM) process is still active. Use close to '
'close it')
self.process = subproce... |
def eval(self,
expression,
identify_errors=True,
print_expression=True,
on_new_output=sys.stdout.write):
""" Evaluates a matlab expression synchronously.
If identify_erros is true, and the last output line after evaluat... |
def put(self, name_to_val, oned_as='row', on_new_output=None):
""" Loads a dictionary of variable names into the matlab shell.
oned_as is the same as in scipy.io.matlab.savemat function:
oned_as : {'column', 'row'}, optional
If 'column', write 1-D numpy arrays as column vectors.
... |
def get(self,
names_to_get,
extract_numpy_scalars=True,
on_new_output=None):
""" Loads the requested variables from the matlab shell.
names_to_get can be either a variable name, a list of variable names, or
None.
If it is a var... |
def rexGroups(rex):
"""Return the named groups in a regular expression (compiled or as string)
in occuring order.
>>> rexGroups(r'(?P<name>\w+) +(?P<surname>\w+)')
('name', 'surname')
"""
if isinstance(rex,basestring): rex = re.compile(rex)
return zip(*sorted([(n,g) for (g,n) in rex.groupi... |
def div(a,b):
"""``div(a,b)`` is like ``a // b`` if ``b`` devides ``a``, otherwise
an `ValueError` is raised.
>>> div(10,2)
5
>>> div(10,3)
Traceback (most recent call last):
...
ValueError: 3 does not divide 10
"""
res, fail = divmod(a,b)
if fail:
raise ValueError("... |
def ipshuffle(l, random=None):
r"""Shuffle list `l` inplace and return it."""
import random as _random
_random.shuffle(l, random)
return l |
def shuffle(seq, random=None):
r"""Return shuffled *copy* of `seq`."""
if isinstance(seq, list):
return ipshuffle(seq[:], random)
elif isString(seq):
# seq[0:0] == "" or u""
return seq[0:0].join(ipshuffle(list(seq)),random)
else:
return type(seq)(ipshuffle(list(seq),rand... |
def slurp(file, binary=False, expand=False):
r"""Read in a complete file `file` as a string
Parameters:
- `file`: a file handle or a string (`str` or `unicode`).
- `binary`: whether to read in the file in binary mode (default: False).
"""
mode = "r" + ["b",""][not binary]
file = _normaliz... |
def withFile(file, func, mode='r', expand=False):
"""Pass `file` to `func` and ensure the file is closed afterwards. If
`file` is a string, open according to `mode`; if `expand` is true also
expand user and vars.
"""
file = _normalizeToFile(file, mode=mode, expand=expand)
try: return ... |
def slurpLines(file, expand=False):
r"""Read in a complete file (specified by a file handler or a filename
string/unicode string) as list of lines"""
file = _normalizeToFile(file, "r", expand)
try: return file.readlines()
finally: file.close() |
def slurpChompedLines(file, expand=False):
r"""Return ``file`` a list of chomped lines. See `slurpLines`."""
f=_normalizeToFile(file, "r", expand)
try: return list(chompLines(f))
finally: f.close() |
def strToTempfile(s, suffix=None, prefix=None, dir=None, binary=False):
"""Create a new tempfile, write ``s`` to it and return the filename.
`suffix`, `prefix` and `dir` are like in `tempfile.mkstemp`.
"""
fd, filename = tempfile.mkstemp(**dict((k,v) for (k,v) in
... |
def spitOut(s, file, binary=False, expand=False):
r"""Write string `s` into `file` (which can be a string (`str` or
`unicode`) or a `file` instance)."""
mode = "w" + ["b",""][not binary]
file = _normalizeToFile(file, mode=mode, expand=expand)
try: file.write(s)
finally: file.close() |
def spitOutLines(lines, file, expand=False):
r"""Write all the `lines` to `file` (which can be a string/unicode or a
file handler)."""
file = _normalizeToFile(file, mode="w", expand=expand)
try: file.writelines(lines)
finally: file.close() |
def readProcess(cmd, *args):
r"""Similar to `os.popen3`, but returns 2 strings (stdin, stdout) and the
exit code (unlike popen2, exit is 0 if no problems occured (for some
bizarre reason popen2 returns None... <sigh>).
FIXME: only works for UNIX; handling of signalled processes.
"""
import pope... |
def runProcess(cmd, *args):
"""Run `cmd` (which is searched for in the executable path) with `args` and
return the exit status.
In general (unless you know what you're doing) use::
runProcess('program', filename)
rather than::
os.system('program %s' % filename)
because the latter will... |
def splitext(p):
r"""Like the normal splitext (in posixpath), but doesn't treat dotfiles
(e.g. .emacs) as extensions. Also uses os.sep instead of '/'."""
root, ext = os.path.splitext(p)
# check for dotfiles
if (not root or root[-1] == os.sep): # XXX: use '/' or os.sep here???
return (root +... |
def bipart(func, seq):
r"""Like a partitioning version of `filter`. Returns
``[itemsForWhichFuncReturnedFalse, itemsForWhichFuncReturnedTrue]``.
Example:
>>> bipart(bool, [1,None,2,3,0,[],[0]])
[[None, 0, []], [1, 2, 3, [0]]]
"""
if func is None: func = bool
res = [[],[]]
for i in... |
def binarySearchPos(seq, item, cmpfunc=cmp):
r"""Return the position of `item` in ordered sequence `seq`, using comparison
function `cmpfunc` (defaults to ``cmp``) and return the first found
position of `item`, or -1 if `item` is not in `seq`. The returned position
is NOT guaranteed to be the first occu... |
def binarySearchItem(seq, item, cmpfunc=cmp):
r""" Search an ordered sequence `seq` for `item`, using comparison function
`cmpfunc` (defaults to ``cmp``) and return the first found instance of
`item`, or `None` if item is not in `seq`. The returned item is NOT
guaranteed to be the first occurrence of it... |
def rotate(l, steps=1):
r"""Rotates a list `l` `steps` to the left. Accepts
`steps` > `len(l)` or < 0.
>>> rotate([1,2,3])
[2, 3, 1]
>>> rotate([1,2,3,4],-2)
[3, 4, 1, 2]
>>> rotate([1,2,3,4],-5)
[4, 1, 2, 3]
>>> rotate([1,2,3,4],1)
[2, 3, 4, 1]
>>> l = [1,2,3]; rotate(l) is... |
def iprotate(l, steps=1):
r"""Like rotate, but modifies `l` in-place.
>>> l = [1,2,3]
>>> iprotate(l) is l
True
>>> l
[2, 3, 1]
>>> iprotate(iprotate(l, 2), -3)
[1, 2, 3]
"""
if len(l):
steps %= len(l)
if steps:
firstPart = l[:steps]
del ... |
def unique(iterable):
r"""Returns all unique items in `iterable` in the *same* order (only works
if items in `seq` are hashable).
"""
d = {}
return (d.setdefault(x,x) for x in iterable if x not in d) |
def notUnique(iterable, reportMax=INF):
"""Returns the elements in `iterable` that aren't unique; stops after it found
`reportMax` non-unique elements.
Examples:
>>> list(notUnique([1,1,2,2,3,3]))
[1, 2, 3]
>>> list(notUnique([1,1,2,2,3,3], 1))
[1]
"""
hash = {}
n=0
if repo... |
def unweave(iterable, n=2):
r"""Divide `iterable` in `n` lists, so that every `n`th element belongs to
list `n`.
Example:
>>> unweave((1,2,3,4,5), 3)
[[1, 4], [2, 5], [3]]
"""
res = [[] for i in range(n)]
i = 0
for x in iterable:
res[i % n].append(x)
i += 1
retu... |
def weave(*iterables):
r"""weave(seq1 [, seq2] [...]) -> iter([seq1[0], seq2[0] ...]).
>>> list(weave([1,2,3], [4,5,6,'A'], [6,7,8, 'B', 'C']))
[1, 4, 6, 2, 5, 7, 3, 6, 8]
Any iterable will work. The first exhausted iterable determines when to
stop. FIXME rethink stopping semantics.
>>> list... |
def atIndices(indexable, indices, default=__unique):
r"""Return a list of items in `indexable` at positions `indices`.
Examples:
>>> atIndices([1,2,3], [1,1,0])
[2, 2, 1]
>>> atIndices([1,2,3], [1,1,0,4], 'default')
[2, 2, 1, 'default']
>>> atIndices({'a':3, 'b':0}, ['a'])
[3]
"""
... |
def window(iterable, n=2, s=1):
r"""Move an `n`-item (default 2) windows `s` steps (default 1) at a time
over `iterable`.
Examples:
>>> list(window(range(6),2))
[(0, 1), (1, 2), (2, 3), (3, 4), (4, 5)]
>>> list(window(range(6),3))
[(0, 1, 2), (1, 2, 3), (2, 3, 4), (3, 4, 5)]
>>> list(w... |
def group(iterable, n=2, pad=__unique):
r"""Iterate `n`-wise (default pairwise) over `iter`.
Examples:
>>> for (first, last) in group("Akira Kurosawa John Ford".split()):
... print "given name: %s surname: %s" % (first, last)
...
given name: Akira surname: Kurosawa
given name: John sur... |
def iterate(f, n=None, last=__unique):
"""
>>> list(iterate(lambda x:x//2)(128))
[128, 64, 32, 16, 8, 4, 2, 1, 0]
>>> list(iterate(lambda x:x//2, n=2)(128))
[128, 64]
"""
if n is not None:
def funciter(start):
for i in xrange(n): yield start; start = f(start)
else:
... |
def dropwhilenot(func, iterable):
"""
>>> list(dropwhilenot(lambda x:x==3, range(10)))
[3, 4, 5, 6, 7, 8, 9]
"""
iterable = iter(iterable)
for x in iterable:
if func(x): break
else: return
yield x
for x in iterable:
yield x |
def stretch(iterable, n=2):
r"""Repeat each item in `iterable` `n` times.
Example:
>>> list(stretch(range(3), 2))
[0, 0, 1, 1, 2, 2]
"""
times = range(n)
for item in iterable:
for i in times: yield item |
def splitAt(iterable, indices):
r"""Yield chunks of `iterable`, split at the points in `indices`:
>>> [l for l in splitAt(range(10), [2,5])]
[[0, 1], [2, 3, 4], [5, 6, 7, 8, 9]]
splits past the length of `iterable` are ignored:
>>> [l for l in splitAt(range(10), [2,5,10])]
[[0, 1], [2, 3, 4],... |
def update(d, e):
"""Return a copy of dict `d` updated with dict `e`."""
res = copy.copy(d)
res.update(e)
return res |
def invertDict(d, allowManyToOne=False):
r"""Return an inverted version of dict `d`, so that values become keys and
vice versa. If multiple keys in `d` have the same value an error is
raised, unless `allowManyToOne` is true, in which case one of those
key-value pairs is chosen at random for the inversio... |
def iflatten(seq, isSeq=isSeq):
r"""Like `flatten` but lazy."""
for elt in seq:
if isSeq(elt):
for x in iflatten(elt, isSeq):
yield x
else:
yield elt |
def flatten(seq, isSeq=isSeq):
r"""Returns a flattened version of a sequence `seq` as a `list`.
Parameters:
- `seq`: The sequence to be flattened (any iterable).
- `isSeq`: The function called to determine whether something is a
sequence (default: `isSeq`). *Beware that this function should
... |
def positionIf(pred, seq):
"""
>>> positionIf(lambda x: x > 3, range(10))
4
"""
for i,e in enumerate(seq):
if pred(e):
return i
return -1 |
def union(seq1=(), *seqs):
r"""Return the set union of `seq1` and `seqs`, duplicates removed, order random.
Examples:
>>> union()
[]
>>> union([1,2,3])
[1, 2, 3]
>>> union([1,2,3], {1:2, 5:1})
[1, 2, 3, 5]
>>> union((1,2,3), ['a'], "bcd")
['a', 1, 2, 3, 'd', 'b', 'c']
>>> un... |
def without(seq1, seq2):
r"""Return a list with all elements in `seq2` removed from `seq1`, order
preserved.
Examples:
>>> without([1,2,3,1,2], [1])
[2, 3, 2]
"""
if isSet(seq2): d2 = seq2
else: d2 = set(seq2)
return [elt for elt in seq1 if elt not in d2] |
def some(predicate, *seqs):
"""
>>> some(lambda x: x, [0, False, None])
False
>>> some(lambda x: x, [None, 0, 2, 3])
2
>>> some(operator.eq, [0,1,2], [2,1,0])
True
>>> some(operator.eq, [1,2], [2,1])
False
"""
try:
if len(seqs) == 1: return ifilter(bool,imap(predicate... |
def every(predicate, *iterables):
r"""Like `some`, but only returns `True` if all the elements of `iterables`
satisfy `predicate`.
Examples:
>>> every(bool, [])
True
>>> every(bool, [0])
False
>>> every(bool, [1,1])
True
>>> every(operator.eq, [1,2,3],[1,2])
True
>>> eve... |
def nTimes(n, f, *args, **kwargs):
r"""Call `f` `n` times with `args` and `kwargs`.
Useful e.g. for simplistic timing.
Examples:
>>> nTimes(3, sys.stdout.write, 'hallo\n')
hallo
hallo
hallo
"""
for i in xrange(n): f(*args, **kwargs) |
def timeCall(*funcAndArgs, **kwargs):
r"""Return the time (in ms) it takes to call a function (the first
argument) with the remaining arguments and `kwargs`.
Examples:
To find out how long ``func('foo', spam=1)`` takes to execute, do:
``timeCall(func, foo, spam=1)``
"""
func, args = func... |
def replaceStrs(s, *args):
r"""Replace all ``(frm, to)`` tuples in `args` in string `s`.
>>> replaceStrs("nothing is better than warm beer",
... ('nothing','warm beer'), ('warm beer','nothing'))
'warm beer is better than nothing'
"""
if args == (): return s
mapping = dict((frm,... |
def unescape(s):
r"""Inverse of `escape`.
>>> unescape(r'\x41\n\x42\n\x43')
'A\nB\nC'
>>> unescape(r'\u86c7')
u'\u86c7'
>>> unescape(u'ah')
u'ah'
"""
if re.search(r'(?<!\\)\\(\\\\)*[uU]', s) or isinstance(s, unicode):
return unescapeUnicode(s)
else:
return unescap... |
def lineAndColumnAt(s, pos):
r"""Return line and column of `pos` (0-based!) in `s`. Lines start with
1, columns with 0.
Examples:
>>> lineAndColumnAt("0123\n56", 5)
(2, 0)
>>> lineAndColumnAt("0123\n56", 6)
(2, 1)
>>> lineAndColumnAt("0123\n56", 0)
(1, 0)
"""
if pos >= len(... |
def prin(*args, **kwargs):
r"""Like ``print``, but a function. I.e. prints out all arguments as
``print`` would do. Specify output stream like this::
print('ERROR', `out="sys.stderr"``).
"""
print >> kwargs.get('out',None), " ".join([str(arg) for arg in args]) |
def fitString(s, maxCol=79, newlineReplacement=None):
r"""Truncate `s` if necessary to fit into a line of width `maxCol`
(default: 79), also replacing newlines with `newlineReplacement` (default
`None`: in which case everything after the first newline is simply
discarded).
Examples:
>>> fitStr... |
def saveVars(filename, varNamesStr, outOf=None, **opts):
r"""Pickle name and value of all those variables in `outOf` (default: all
global variables (as seen from the caller)) that are named in
`varNamesStr` into a file called `filename` (if no extension is given,
'.bpickle' is appended). Overwrites file... |
def addVars(filename, varNamesStr, outOf=None):
r"""Like `saveVars`, but appends additional variables to file."""
filename, varnames, outOf = __saveVarsHelper(filename, varNamesStr, outOf)
f = None
try:
f = open(filename, "rb")
h = cPickle.load(f)
f.close()
h.update(dict... |
def loadDict(filename):
"""Return the variables pickled pickled into `filename` with `saveVars`
as a dict."""
filename = os.path.expanduser(filename)
if not splitext(filename)[1]: filename += ".bpickle"
f = None
try:
f = open(filename, "rb")
varH = cPickle.load(f)
finally:
... |
def loadVars(filename, ask=True, into=None, only=None):
r"""Load variables pickled with `saveVars`.
Parameters:
- `ask`: If `True` then don't overwrite existing variables without
asking.
- `only`: A list to limit the variables to or `None`.
- `into`: The dictionary the ... |
def runInfo(prog=None,vers=None,date=None,user=None,dir=None,args=None):
r"""Create a short info string detailing how a program was invoked. This is
meant to be added to a history comment field of a data file were it is
important to keep track of what programs modified it and how.
!!!:`args` should be ... |
def makePrintReturner(pre="", post="" ,out=None):
r"""Creates functions that print out their argument, (between optional
`pre` and `post` strings) and return it unmodified. This is usefull for
debugging e.g. parts of expressions, without having to modify the behavior
of the program.
Example:
>... |
def asVerboseContainer(cont, onGet=None, onSet=None, onDel=None):
"""Returns a 'verbose' version of container instance `cont`, that will
execute `onGet`, `onSet` and `onDel` (if not `None`) every time
__getitem__, __setitem__ and __delitem__ are called, passing `self`, `key`
(and `value` in the... |
def mkRepr(instance, *argls, **kwargs):
r"""Convinience function to implement ``__repr__``. `kwargs` values are
``repr`` ed. Special behavior for ``instance=None``: just the
arguments are formatted.
Example:
>>> class Thing:
... def __init__(self, color, shape, taste=None):... |
def d2attrs(*args, **kwargs):
"""Utility function to remove ``**kwargs`` parsing boiler-plate in
``__init__``:
>>> kwargs = dict(name='Bill', age=51, income=1e7)
>>> self = ezstruct(); d2attrs(kwargs, self, 'income', 'name'); self
ezstruct(income=10000000.0, name='Bill')
>>> ... |
def pairwise(fun, v):
"""
>>> pairwise(operator.sub, [4,3,2,1,-10])
[1, 1, 1, 11]
>>> import numpy
>>> pairwise(numpy.subtract, numpy.array([4,3,2,1,-10]))
array([ 1, 1, 1, 11])
"""
if not hasattr(v, 'shape'):
return list(ipairwise(fun,v))
else:
return fun(v[:-1],v[... |
def argmax(iterable, key=None, both=False):
"""
>>> argmax([4,2,-5])
0
>>> argmax([4,2,-5], key=abs)
2
>>> argmax([4,2,-5], key=abs, both=True)
(2, 5)
"""
if key is not None:
it = imap(key, iterable)
else:
it = iter(iterable)
score, argmax = reduce(max, izip(i... |
def argmin(iterable, key=None, both=False):
"""See `argmax`.
"""
if key is not None:
it = imap(key, iterable)
else:
it = iter(iterable)
score, argmin = reduce(min, izip(it, count()))
if both:
return argmin, score
return argmin |
def isInt(num):
"""Returns true if `num` is (sort of) an integer.
>>> isInt(3) == isInt(3.0) == 1
True
>>> isInt(3.2)
False
>>> import numpy
>>> isInt(numpy.array(1))
True
>>> isInt(numpy.array([1]))
False
"""
try:
len(num) # FIXME fails for Numeric but Numeric is... |
def mapConcat(func, *iterables):
"""Similar to `map` but the instead of collecting the return values of
`func` in a list, the items of each return value are instaed collected
(so `func` must return an iterable type).
Examples:
>>> mapConcat(lambda x:[x], [1,2,3])
[1, 2, 3]
>>> mapConcat(la... |
def unfold(seed, by, last = __unique):
"""
>>> list(unfold(1234, lambda x: divmod(x,10)))[::-1]
[1, 2, 3, 4]
>>> sum(imap(operator.mul,unfold(1234, lambda x:divmod(x,10)), iterate(lambda x:x*10)(1)))
1234
>>> g = unfold(1234, lambda x:divmod(x,10))
>>> reduce((lambda (total,pow),digit:(total... |
def reduceR(f, sequence, initial=__unique):
"""*R*ight reduce.
>>> reduceR(lambda x,y:x/y, [1.,2.,3.,4]) == 1./(2./(3./4.)) == (1./2.)*(3./4.)
True
>>> reduceR(lambda x,y:x-y, iter([1,2,3]),4) == 1-(2-(3-4)) == (1-2)+(3-4)
True
"""
try: rev = reversed(sequence)
except TypeError: rev = re... |
def compose(*funcs):
"""Compose `funcs` to a single function.
>>> compose(operator.abs, operator.add)(-2,-3)
5
>>> compose()('nada')
'nada'
>>> compose(sorted, set, partial(filter, None))(range(3)[::-1]*2)
[1, 2]
"""
# slightly optimized for most common cases and hence verbose
i... |
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