from typing import Dict, List, Optional, Sequence, Union
from warnings import warn
import biocutils as ut
from .utils import _sanitize_vec
__author__ = "jkanche"
__copyright__ = "jkanche"
__license__ = "MIT"
def _validate_seqnames(seqnames):
if not ut.is_list_of_type(seqnames, str):
raise ValueError("'seqnames' should be a list of strings.")
n = len(seqnames)
if n != len(set(seqnames)):
raise ValueError("'seqnames' should contain unique strings.")
def _validate_seqlengths(seqlengths, num_seqs):
if not ut.is_list_of_type(seqlengths, int, ignore_none=True):
raise ValueError("'seqlengths' should be a list of integers.")
if num_seqs != len(seqlengths):
raise ValueError("'seqnames' and 'seqlengths' should have the same length.")
for sl in seqlengths:
if sl is not None and sl < 0:
raise ValueError("all entries of 'seqlengths' should be non-negative.")
def _validate_is_circular(is_circular, num_seqs):
if not ut.is_list_of_type(is_circular, bool, ignore_none=True):
raise ValueError("'is_circular' should be a list of booleans.")
if num_seqs != len(is_circular):
raise ValueError("'seqnames' and 'is_circular' should have the same length.")
def _validate_genome(genome, num_seqs):
if not ut.is_list_of_type(genome, str, ignore_none=True):
raise ValueError("'genome' should be a list of strings.")
if num_seqs != len(genome):
raise ValueError("'seqnames' and 'genome' should have the same length.")
[docs]
class SeqInfoIterator:
"""An iterator to a :py:class:`~SeqInfo` object."""
[docs]
def __init__(self, obj: "SeqInfo") -> None:
"""Initialize the iterator.
Args:
obj:
Source object to iterate.
"""
self._sinfo = obj
self._current_index = 0
[docs]
def __iter__(self):
return self
[docs]
def __next__(self):
if self._current_index < len(self._sinfo):
iter_row_index = self._sinfo._seqnames[self._current_index]
iter_slice = self._sinfo[self._current_index]
self._current_index += 1
return (iter_row_index, iter_slice)
raise StopIteration
[docs]
class SeqInfo:
"""Information about the reference sequences, specifically the name and length of each sequence, whether it is a
circular, and the identity of the genome from which it was derived."""
[docs]
def __init__(
self,
seqnames: Sequence[str],
seqlengths: Optional[Union[int, Sequence[int], Dict[str, int]]] = None,
is_circular: Optional[Union[bool, Sequence[bool], Dict[str, bool]]] = None,
genome: Optional[Union[str, Sequence[str], Dict[str, str]]] = None,
validate: bool = True,
) -> None:
"""
Args:
seqnames:
Names of all reference sequences, should be unique.
seqlengths:
Lengths of all sequences in base pairs. This should contain
non-negative values and have the same number of elements as
``seqnames``. Entries may also be None if no lengths are
available for that sequence.
Alternatively, a dictionary where keys are the sequence names
and values are the lengths. If a name is missing from this
dictionary, the length of the sequence is set to None.
Alternatively a single integer, if all sequences are of the
same length.
Alternatively None, if no length information is available
for any sequence.
is_circular:
Whether each sequence is circular. This should have the same
number of elements as ``seqnames``. Entries may also be None
if no information is available for that sequence.
Alternatively, a dictionary where keys are the sequence names
and values are the circular flags. If a name is missing from
this dictionary, the flag for the sequence is set to None.
Alternatively a single boolean, if all sequences have the same
circular flag.
Alternatively None, if no flags are available for any sequence.
genome:
The genome build containing each reference sequence. This
should have the same number of elements as ``seqnames``.
Entries may also be None if no information is available.
Alternatively, a dictionary where keys are the sequence names
and values are the genomes. If a name is missing from this
dictionary, the genome is set to None.
Alternatively a single string, if all sequences are derived
from the same genome.
Alternatively None, if no genome information is available
for any sequence.
validate:
Whether to validate the arguments, internal use only.
"""
self._seqnames = list(seqnames)
self._reverse_seqnames = None
self._seqlengths = self._flatten_incoming(seqlengths, int)
self._is_circular = self._flatten_incoming(is_circular, bool)
self._genome = self._flatten_incoming(genome, str)
if validate:
_validate_seqnames(self._seqnames)
num_seqs = len(self._seqnames)
_validate_seqlengths(self._seqlengths, num_seqs)
_validate_is_circular(self._is_circular, num_seqs)
_validate_genome(self._genome, num_seqs)
def _populate_reverse_seqnames_index(self):
if self._reverse_seqnames is None:
revmap = {}
for i, n in enumerate(self._seqnames):
if n not in revmap:
revmap[n] = i
self._reverse_seqnames = revmap
def _wipe_reverse_seqnames_index(self):
self._reverse_seqnames = None
def _flatten_incoming(self, values, expected) -> List:
if values is None or isinstance(values, expected):
return [values] * len(self)
if isinstance(values, dict):
output = []
for n in self._seqnames:
if n in values:
output.append(values[n])
else:
output.append(None)
return output
values = _sanitize_vec(values)
if isinstance(values, list):
return values
return list(values)
def _define_output(self, in_place: bool = False) -> "SeqInfo":
if in_place is True:
return self
else:
return self.__copy__()
#########################
######>> Copying <<######
#########################
[docs]
def __deepcopy__(self, memo=None, _nil=[]):
"""
Returns:
A deep copy of the current ``SeqInfo``.
"""
from copy import deepcopy
_seqnames_copy = deepcopy(self._seqnames)
_seqlengths_copy = deepcopy(self._seqlengths)
_is_circular_copy = deepcopy(self._is_circular)
_genome_copy = deepcopy(self._genome)
current_class_const = type(self)
return current_class_const(
seqnames=_seqnames_copy,
seqlengths=_seqlengths_copy,
is_circular=_is_circular_copy,
genome=_genome_copy,
validate=False,
)
[docs]
def __copy__(self):
"""
Returns:
A shallow copy of the current ``SeqInfo``.
"""
current_class_const = type(self)
return current_class_const(
self._seqnames,
self._seqlengths,
self._is_circular,
self._genome,
validate=False,
)
[docs]
def copy(self):
"""Alias for :py:meth:`~__copy__`."""
return self.__copy__()
##########################
######>> Printing <<######
##########################
[docs]
def __repr__(self) -> str:
"""
Returns:
A string representation of this ``SeqInfo``.
"""
output = "SeqInfo(number_of_seqnames=" + str(len(self))
output += ", seqnames=" + ut.print_truncated_list(self._seqnames)
output += ", seqlengths=" + repr(self._seqlengths)
output += ", is_circular=" + ut.print_truncated_list(self._is_circular)
output += ", genome=" + ut.print_truncated_list(self._genome)
output += ")"
return output
def __str__(self) -> str:
"""
Returns:
A pretty-printed string containing the contents of this ``SeqInfo``.
"""
output = f"SeqInfo with {len(self)} sequence{'s' if len(self) != 1 else ''}\n"
nr = len(self)
added_table = False
if nr:
if nr <= 10:
indices = range(nr)
insert_ellipsis = False
else:
indices = [0, 1, 2, nr - 3, nr - 2, nr - 1]
insert_ellipsis = True
raw_floating = ut.create_floating_names(None, indices)
if insert_ellipsis:
raw_floating = raw_floating[:3] + [""] + raw_floating[3:]
floating = ["", ""] + raw_floating
columns = []
header = ["seqnames", "<str>"]
showed = [f"{self._seqnames[x]}" for x in indices]
if insert_ellipsis:
showed = showed[:3] + ["..."] + showed[3:]
columns.append(header + showed)
header = ["seqlengths", f"<{ut.print_type(self._seqlengths)}>"]
showed = [f"{self._seqlengths[x]}" for x in indices]
if insert_ellipsis:
showed = showed[:3] + ["..."] + showed[3:]
columns.append(header + showed)
header = ["is_circular", f"<{ut.print_type(self._is_circular)}>"]
showed = [f"{self._is_circular[x]}" for x in indices]
if insert_ellipsis:
showed = showed[:3] + ["..."] + showed[3:]
columns.append(header + showed)
header = ["genome", f"<{ut.print_type(self._genome)}>"]
showed = [f"{self._genome[x]}" for x in indices]
if insert_ellipsis:
showed = showed[:3] + ["..."] + showed[3:]
columns.append(header + showed)
output += ut.print_wrapped_table(columns, floating_names=floating)
added_table = True
footer = []
if len(footer):
if added_table:
output += "\n------\n"
output += "\n".join(footer)
return output
##########################
######>> seqnames <<######
##########################
[docs]
def get_seqnames(self) -> List[str]:
"""
Returns:
List of all chromosome names.
"""
return self._seqnames
[docs]
def set_seqnames(
self, seqnames: Sequence[str], in_place: bool = False
) -> "SeqInfo":
"""
Args:
seqnames:
List of sequence names, of length equal to the number of names
in this ``SeqInfo`` object. All names should be unique strings.
in_place:
Whether to modify the ``SeqInfo`` object in place.
Returns:
A modified ``SeqInfo`` object, either as a copy of the original
or as a reference to the (in-place-modified) original.
"""
_validate_seqnames(list(seqnames))
output = self._define_output(in_place)
output._seqnames = list(seqnames)
return output
@property
def seqnames(self) -> List[str]:
warn("'seqnames' is deprecated, use 'get_seqnames' instead", UserWarning)
return self.get_seqnames()
@seqnames.setter
def seqnames(self, seqnames: Sequence[str]):
warn(
"Setting property 'seqnames' is an in-place operation, use 'set_seqnames' instead",
UserWarning,
)
self.set_seqnames(seqnames, in_place=True)
############################
######>> seqlengths <<######
############################
[docs]
def get_seqlengths(self) -> List[int]:
"""
Returns:
A list of integers is returned containing the lengths of all
sequences, in the same order as the sequence names from
:py:meth:`~get_seqnames`.
"""
return self._seqlengths
[docs]
def set_seqlengths(
self,
seqlengths: Optional[Union[int, Sequence[int], Dict[str, int]]],
in_place: bool = False,
) -> "SeqInfo":
"""
Args:
seqlengths:
List of sequence lengths, of length equal to the number of
names in this ``SeqInfo`` object. Values may be None or
non-negative integers.
Alternatively, a dictionary where keys are the sequence
names and values are the lengths. Not all names need to be
present in which case the length is assumed to be None.
in_place:
Whether to modify the ``SeqInfo`` object in place.
Returns:
A modified ``SeqInfo`` object, either as a copy of the original
or as a reference to the (in-place-modified) original.
"""
_seqlengths = self._flatten_incoming(seqlengths, int)
_validate_seqlengths(_seqlengths, len(self))
output = self._define_output(in_place)
output._seqlengths = _seqlengths
return output
@property
def seqlengths(self) -> List[int]:
warn(
"'seqlengths' is deprecated, use 'get_seqlengths' instead",
UserWarning,
)
return self.get_seqlengths()
@seqlengths.setter
def seqlengths(
self, seqlengths: Optional[Union[int, Sequence[int], Dict[str, int]]]
):
warn(
"Setting property 'seqlengths' is an in-place operation, use 'set_seqlengths' instead",
UserWarning,
)
self.set_seqlengths(seqlengths, in_place=True)
#############################
######>> is-circular <<######
#############################
[docs]
def get_is_circular(self) -> List[bool]:
"""
Returns:
A list of booleans is returned specifying whether each sequence
(from :py:meth:`~get_seqnames`) is circular.
"""
return self._is_circular
[docs]
def set_is_circular(
self,
is_circular: Optional[Union[bool, Sequence[bool], Dict[str, bool]]],
in_place: bool = False,
) -> "SeqInfo":
"""
Args:
is_circular:
List of circular flags, of length equal to the number of
names in this ``SeqInfo`` object. Values may be None or
booleans.
Alternatively, a dictionary where keys are the sequence
names and values are the flags. Not all names need to be
present in which case the flag is assumed to be None.
in_place:
Whether to modify the ``SeqInfo`` object in place.
Returns:
A modified ``SeqInfo`` object, either as a copy of the original
or as a reference to the (in-place-modified) original.
"""
_is_circular = self._flatten_incoming(is_circular, bool)
_validate_is_circular(_is_circular, len(self))
output = self._define_output(in_place)
output._is_circular = _is_circular
return output
@property
def is_circular(self) -> List[bool]:
warn(
"'is_circular' is deprecated, use 'get_is_circular' instead",
UserWarning,
)
return self.get_is_circular()
@is_circular.setter
def is_circular(
self, is_circular: Optional[Union[bool, Sequence[bool], Dict[str, bool]]]
):
warn(
"Setting property 'is_circular' is an in-place operation, use 'set_is_circular' instead",
UserWarning,
)
self.set_is_circular(is_circular, in_place=True)
########################
######>> genome <<######
########################
[docs]
def get_genome(self) -> List[str]:
"""
Returns:
A list of strings is returned containing the genome identity for
all sequences in :py:meth:`~get_seqnames`.
"""
return self._genome
[docs]
def set_genome(
self,
genome: Optional[Union[str, Sequence[str], Dict[str, str]]],
in_place: bool = False,
) -> "SeqInfo":
"""
Args:
genome:
List of genomes, of length equal to the number of names in this
``SeqInfo`` object. Values may be None or strings.
in_place:
Whether to modify the ``SeqInfo`` object in place.
Returns:
A modified ``SeqInfo`` object, either as a copy of the original
or as a reference to the (in-place-modified) original.
"""
_genome = self._flatten_incoming(genome, str)
_validate_genome(_genome, len(self))
output = self._define_output(in_place)
output._genome = _genome
return output
@property
def genome(self) -> List[str]:
warn("'genome' is deprecated, use 'get_genome' instead", UserWarning)
return self.get_genome()
@genome.setter
def genome(self, genome: Optional[Union[bool, Sequence[bool], Dict[str, bool]]]):
warn(
"Setting property 'genome' is an in-place operation, use 'set_genome' instead",
UserWarning,
)
self.set_genome(genome, in_place=True)
######################################
######>> length and iterators <<######
######################################
[docs]
def __len__(self) -> int:
"""
Returns:
Number of sequences in this object.
"""
return len(self._seqnames)
[docs]
def __iter__(self) -> SeqInfoIterator:
"""Iterator over sequences."""
return SeqInfoIterator(self)
#########################
######>> Slicers <<######
#########################
[docs]
def get_subset(self, subset: Union[str, int, bool, Sequence]) -> "SeqInfo":
"""Subset ``SeqInfo``, based on their indices or seqnames.
Args:
subset:
Indices to be extracted. This may be an integer, boolean, string,
or any sequence thereof, as supported by
:py:meth:`~biocutils.normalize_subscript.normalize_subscript`.
Scalars are treated as length-1 sequences.
Strings may only be used if :py:attr:``~seqnames`` are available (see
:py:meth:`~get_seqnames`). The first occurrence of each string
in the seqnames is used for extraction.
Returns:
A new ``SeqInfo`` object with the sequences of interest.
"""
if len(self) == 0:
return SeqInfo.empty()
idx, _ = ut.normalize_subscript(subset, len(self), self._seqnames)
current_class_const = type(self)
return current_class_const(
seqnames=ut.subset_sequence(self._seqnames, idx),
seqlengths=ut.subset_sequence(self._seqlengths, idx),
is_circular=ut.subset_sequence(self._is_circular, idx),
genome=ut.subset_sequence(self._genome, idx),
)
[docs]
def __getitem__(self, subset: Union[str, int, bool, Sequence]) -> "SeqInfo":
"""Alias to :py:attr:`~get_subset`."""
return self.get_subset(subset)
[docs]
@classmethod
def empty(cls):
"""Create an zero-length `SeqInfo` object.
Returns:
same type as caller, in this case a `SeqInfo`.
"""
return SeqInfo([], [], [], [])
@ut.combine_sequences.register
def _combine_SeqInfo(*x: SeqInfo) -> SeqInfo:
return merge_SeqInfo(x)
[docs]
def merge_SeqInfo(objects: List[SeqInfo]) -> SeqInfo:
"""Merge multiple :py:class:`~SeqInfo` objects, taking the union of all reference sequences. If the same reference
sequence is present with the same details across ``objects``, only a single instance is present in the final object;
if details are contradictory, they are replaced with None.
Args:
objects: List of ``SeqInfo`` objects.
Returns:
A single merged ``SeqInfo`` object.
"""
all_sequences = {}
for obj in objects:
for i, y in enumerate(obj._seqnames):
curlen = obj._seqlengths[i]
curcir = obj._is_circular[i]
curgen = obj._genome[i]
if y not in all_sequences:
all_sequences[y] = [curlen, curcir, curgen]
else:
present = all_sequences[y]
prelen, precir, pregen = present
if prelen != curlen:
present[0] = None
if precir != curcir:
present[1] = None
if pregen != curgen:
present[2] = None
out_names = []
out_lengths = []
out_circular = []
out_genome = []
for k, v in all_sequences.items():
out_names.append(k)
out_lengths.append(v[0])
out_circular.append(v[1])
out_genome.append(v[2])
return SeqInfo(out_names, out_lengths, out_circular, out_genome, validate=False)