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File Content: `processors.py`

# sqlalchemy/processors.py
# Copyright (C) 2010-2019 the SQLAlchemy authors and contributors
# <see AUTHORS file>
# Copyright (C) 2010 Gaetan de Menten gdementen@gmail.com
#
# This module is part of SQLAlchemy and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php

"""defines generic type conversion functions, as used in bind and result
processors.

They all share one common characteristic: None is passed through unchanged.

"""

import codecs
import datetime
import re

from . import util


def str_to_datetime_processor_factory(regexp, type_):
    rmatch = regexp.match
    # Even on python2.6 datetime.strptime is both slower than this code
    # and it does not support microseconds.
    has_named_groups = bool(regexp.groupindex)

    def process(value):
        if value is None:
            return None
        else:
            try:
                m = rmatch(value)
            except TypeError:
                raise ValueError(
                    "Couldn't parse %s string '%r' "
                    "- value is not a string." % (type_.__name__, value)
                )
            if m is None:
                raise ValueError(
                    "Couldn't parse %s string: "
                    "'%s'" % (type_.__name__, value)
                )
            if has_named_groups:
                groups = m.groupdict(0)
                return type_(
                    **dict(
                        list(
                            zip(
                                iter(groups.keys()),
                                list(map(int, iter(groups.values()))),
                            )
                        )
                    )
                )
            else:
                return type_(*list(map(int, m.groups(0))))

    return process


def py_fallback():
    def to_unicode_processor_factory(encoding, errors=None):
        decoder = codecs.getdecoder(encoding)

        def process(value):
            if value is None:
                return None
            else:
                # decoder returns a tuple: (value, len). Simply dropping the
                # len part is safe: it is done that way in the normal
                # 'xx'.decode(encoding) code path.
                return decoder(value, errors)[0]

        return process

    def to_conditional_unicode_processor_factory(encoding, errors=None):
        decoder = codecs.getdecoder(encoding)

        def process(value):
            if value is None:
                return None
            elif isinstance(value, util.text_type):
                return value
            else:
                # decoder returns a tuple: (value, len). Simply dropping the
                # len part is safe: it is done that way in the normal
                # 'xx'.decode(encoding) code path.
                return decoder(value, errors)[0]

        return process

    def to_decimal_processor_factory(target_class, scale):
        fstring = "%%.%df" % scale

        def process(value):
            if value is None:
                return None
            else:
                return target_class(fstring % value)

        return process

    def to_float(value):  # noqa
        if value is None:
            return None
        else:
            return float(value)

    def to_str(value):  # noqa
        if value is None:
            return None
        else:
            return str(value)

    def int_to_boolean(value):  # noqa
        if value is None:
            return None
        else:
            return bool(value)

    DATETIME_RE = re.compile(
        r"(\d+)-(\d+)-(\d+) (\d+):(\d+):(\d+)(?:\.(\d+))?"
    )
    TIME_RE = re.compile(r"(\d+):(\d+):(\d+)(?:\.(\d+))?")
    DATE_RE = re.compile(r"(\d+)-(\d+)-(\d+)")

    str_to_datetime = str_to_datetime_processor_factory(  # noqa
        DATETIME_RE, datetime.datetime
    )
    str_to_time = str_to_datetime_processor_factory(  # noqa
        TIME_RE, datetime.time
    )  # noqa
    str_to_date = str_to_datetime_processor_factory(  # noqa
        DATE_RE, datetime.date
    )  # noqa
    return locals()


try:
    from sqlalchemy.cprocessors import DecimalResultProcessor  # noqa
    from sqlalchemy.cprocessors import int_to_boolean  # noqa
    from sqlalchemy.cprocessors import str_to_date  # noqa
    from sqlalchemy.cprocessors import str_to_datetime  # noqa
    from sqlalchemy.cprocessors import str_to_time  # noqa
    from sqlalchemy.cprocessors import to_float  # noqa
    from sqlalchemy.cprocessors import to_str  # noqa
    from sqlalchemy.cprocessors import UnicodeResultProcessor  # noqa

    def to_unicode_processor_factory(encoding, errors=None):
        if errors is not None:
            return UnicodeResultProcessor(encoding, errors).process
        else:
            return UnicodeResultProcessor(encoding).process

    def to_conditional_unicode_processor_factory(encoding, errors=None):
        if errors is not None:
            return UnicodeResultProcessor(encoding, errors).conditional_process
        else:
            return UnicodeResultProcessor(encoding).conditional_process

    def to_decimal_processor_factory(target_class, scale):
        # Note that the scale argument is not taken into account for integer
        # values in the C implementation while it is in the Python one.
        # For example, the Python implementation might return
        # Decimal('5.00000') whereas the C implementation will
        # return Decimal('5'). These are equivalent of course.
        return DecimalResultProcessor(target_class, "%%.%df" % scale).process


except ImportError:
    globals().update(py_fallback())

Name	Size	Permission
connectors	---	0755
databases	---	0755
dialects	---	0755
engine	---	0755
event	---	0755
ext	---	0755
orm	---	0755
pool	---	0755
sql	---	0755
testing	---	0755
util	---	0755
__init__.py	4621 bytes	0644
__init__.pyc	5632 bytes	0644
__init__.pyo	5632 bytes	0644
cprocessors.so	16864 bytes	0755
cresultproxy.so	20808 bytes	0755
cutils.so	11344 bytes	0755
events.py	51669 bytes	0644
events.pyc	57097 bytes	0644
events.pyo	57097 bytes	0644
exc.py	16088 bytes	0644
exc.pyc	21617 bytes	0644
exc.pyo	21617 bytes	0644
inspection.py	2990 bytes	0644
inspection.pyc	3316 bytes	0644
inspection.pyo	3316 bytes	0644
interfaces.py	12721 bytes	0644
interfaces.pyc	13892 bytes	0644
interfaces.pyo	13892 bytes	0644
log.py	6693 bytes	0644
log.pyc	8268 bytes	0644
log.pyo	8268 bytes	0644
processors.py	5648 bytes	0644
processors.pyc	5382 bytes	0644
processors.pyo	5382 bytes	0644
schema.py	2377 bytes	0644
schema.pyc	2448 bytes	0644
schema.pyo	2448 bytes	0644
types.py	3377 bytes	0644
types.pyc	3012 bytes	0644
types.pyo	3012 bytes	0644

File Content: processors.py

File Content: `processors.py`