Sep 19, 2021
diff --git a/10-seq-hacking/vector_v5.py b/10-seq-hacking/vector_v5.py
    '<4.000e+00, 1.047e+00, 9.553e-01, 7.854e-01>'
    >>> format(Vector([0, 1, 0, 0]), '0.5fh')
    '<1.00000, 1.57080, 0.00000, 0.00000>'

 Tests of new ``format()`` with length limit::

    >>> v5 = Vector(range(5))
    >>> v100 = Vector(range(100))
    >>> format(v5)
    '(0.0, 1.0, 2.0, 3.0, 4.0)'
    >>> format(v5, 'h')  # doctest:+ELLIPSIS
    '<5.477..., 1.5707..., 1.387..., 1.190..., 0.927...>'
    >>> format(v5, '0.3fh')
    '<5.477, 1.571, 1.387, 1.190, 0.927>'
    >>> format(v5, '*')
    '(0.0, 1.0, 2.0, 3.0, 4.0)'
    >>> format(v5, '.3f*')
    '(0.000, 1.000, 2.000, 3.000, 4.000)'
    >>> format(v5, '.3fh*')
    '<5.477, 1.571, 1.387, 1.190, 0.927>'

    >>> v30 = Vector(range(30))
    >>> format(v30)  # doctest:+ELLIPSIS
    '(0.0, 1.0, ..., 29.0)'
    >>> format(v30, 'h')  # doctest:+ELLIPSIS
    '<92.493..., 1.570..., ..., 0.802...>'
    >>> format(v30, '0.3fh')  # doctest:+ELLIPSIS
    '<92.493, 1.571, ..., 0.803>'
    >>> format(v30, '*')  # doctest:+ELLIPSIS
    '(0.0, 1.0, ..., 29.0)'
    >>> format(v30, '.3f*')  # doctest:+ELLIPSIS
    '(0.000, 1.000, ..., 29.000)'
    >>> format(v30, '.3fh*')  # doctest:+ELLIPSIS
    '<92.493, 1.571, ..., 0.803>'

    >>> v100 = Vector(range(100))
    >>> format(v100)  # doctest:+ELLIPSIS
    '(0.0, 1.0, ..., 29.0, ...)'
    >>> format(v100, 'h')  # doctest:+ELLIPSIS
    '<573.018..., 1.570..., ..., 1.521..., ...>'
    >>> format(v100, '0.3fh')  # doctest:+ELLIPSIS
    '<573.018, 1.571, ..., 1.521, ...>'
    >>> format(v100, '*')  # doctest:+ELLIPSIS
    '(0.0, 1.0, ..., 99.0)'
    >>> format(v100, '.3f*')  # doctest:+ELLIPSIS
    '(0.000, 1.000, ..., 99.000)'
    >>> format(v100, '.3fh*')  # doctest:+ELLIPSIS
    '<573.018, 1.571, ..., 0.790>'

    >>> v100.maxlen = 3
    >>> format(v100)
    '(0.0, 1.0, 2.0, ...)'
    >>> format(v100, 'h')  # doctest:+ELLIPSIS
    '<573.018..., 1.570..., 1.569..., ...>'
    >>> format(v100, '0.3fh')
    '<573.018, 1.571, 1.569, ...>'
    >>> format(v100, '*')  # doctest:+ELLIPSIS
    '(0.0, 1.0, ..., 99.0)'
    >>> format(v100, '.3f*')  # doctest:+ELLIPSIS
    '(0.000, 1.000, ..., 99.000)'
    >>> format(v100, '.3fh*')  # doctest:+ELLIPSIS
    '<573.018, 1.571, ..., 0.790>'
 """

 from array import array
        return functools.reduce(operator.xor, hashes, 0)

    def __abs__(self):
        return math.sqrt(sum(x * x for x inself))
        return math.hypot(*self)

    def __bool__(self):
        returnbool(abs(self))
        returnany(x != 0 for x inself)

    def __len__(self):
        return len(self._components)
    def angles(self):  # <3>
        return (self.angle(n) for n in range(1, len(self)))

    maxlen = 30
    def __format__(self, fmt_spec=''):
        print_all = len(self) <= self.maxlen  # whether print all numbers
        if fmt_spec.endswith('*'):
            fmt_spec = fmt_spec[:-1]
            print_all = True
        if fmt_spec.endswith('h'):  # hyperspherical coordinates
            fmt_spec = fmt_spec[:-1]
            coords = itertools.chain([abs(self)],
                                     self.angles())  # <4>
            if print_all:
                coords = itertools.chain([abs(self)],
                                        self.angles())  # <4>
            else:
                coords = itertools.chain([abs(self)],
                                        itertools.islice(self.angles(), self.maxlen -1))
            outer_fmt = '<{}>'  # <5>
        else:
            coords = self
            if print_all:
                coords = self
            else:
                coords = itertools.islice(self, self.maxlen)
            outer_fmt = '({})'  # <6>
        components = (format(c, fmt_spec) for c in coords)  # <7>
        if not print_all:
            components = itertools.chain(components, ['...'])
        return outer_fmt.format(', '.join(components))  # <8>

    @classmethod
Original file line number	Diff line number	Diff line change
Expand Up		@@ -187,6 +187,65 @@
		'<4.000e+00, 1.047e+00, 9.553e-01, 7.854e-01>'
		>>> format(Vector([0, 1, 0, 0]), '0.5fh')
		'<1.00000, 1.57080, 0.00000, 0.00000>'

		Tests of new ``format()`` with length limit::

		>>> v5 = Vector(range(5))
		>>> v100 = Vector(range(100))
		>>> format(v5)
		'(0.0, 1.0, 2.0, 3.0, 4.0)'
		>>> format(v5, 'h') # doctest:+ELLIPSIS
		'<5.477..., 1.5707..., 1.387..., 1.190..., 0.927...>'
		>>> format(v5, '0.3fh')
		'<5.477, 1.571, 1.387, 1.190, 0.927>'
		>>> format(v5, '*')
		'(0.0, 1.0, 2.0, 3.0, 4.0)'
		>>> format(v5, '.3f*')
		'(0.000, 1.000, 2.000, 3.000, 4.000)'
		>>> format(v5, '.3fh*')
		'<5.477, 1.571, 1.387, 1.190, 0.927>'

		>>> v30 = Vector(range(30))
		>>> format(v30) # doctest:+ELLIPSIS
		'(0.0, 1.0, ..., 29.0)'
		>>> format(v30, 'h') # doctest:+ELLIPSIS
		'<92.493..., 1.570..., ..., 0.802...>'
		>>> format(v30, '0.3fh') # doctest:+ELLIPSIS
		'<92.493, 1.571, ..., 0.803>'
		>>> format(v30, '*') # doctest:+ELLIPSIS
		'(0.0, 1.0, ..., 29.0)'
		>>> format(v30, '.3f*') # doctest:+ELLIPSIS
		'(0.000, 1.000, ..., 29.000)'
		>>> format(v30, '.3fh*') # doctest:+ELLIPSIS
		'<92.493, 1.571, ..., 0.803>'

		>>> v100 = Vector(range(100))
		>>> format(v100) # doctest:+ELLIPSIS
		'(0.0, 1.0, ..., 29.0, ...)'
		>>> format(v100, 'h') # doctest:+ELLIPSIS
		'<573.018..., 1.570..., ..., 1.521..., ...>'
		>>> format(v100, '0.3fh') # doctest:+ELLIPSIS
		'<573.018, 1.571, ..., 1.521, ...>'
		>>> format(v100, '*') # doctest:+ELLIPSIS
		'(0.0, 1.0, ..., 99.0)'
		>>> format(v100, '.3f*') # doctest:+ELLIPSIS
		'(0.000, 1.000, ..., 99.000)'
		>>> format(v100, '.3fh*') # doctest:+ELLIPSIS
		'<573.018, 1.571, ..., 0.790>'

		>>> v100.maxlen = 3
		>>> format(v100)
		'(0.0, 1.0, 2.0, ...)'
		>>> format(v100, 'h') # doctest:+ELLIPSIS
		'<573.018..., 1.570..., 1.569..., ...>'
		>>> format(v100, '0.3fh')
		'<573.018, 1.571, 1.569, ...>'
		>>> format(v100, '*') # doctest:+ELLIPSIS
		'(0.0, 1.0, ..., 99.0)'
		>>> format(v100, '.3f*') # doctest:+ELLIPSIS
		'(0.000, 1.000, ..., 99.000)'
		>>> format(v100, '.3fh*') # doctest:+ELLIPSIS
		'<573.018, 1.571, ..., 0.790>'
		"""

		from array import array
Expand DownExpand Up		@@ -228,10 +287,10 @@ def __hash__(self):
		return functools.reduce(operator.xor, hashes, 0)

		def __abs__(self):
		return math.sqrt(sum(x * x for x inself))
		return math.hypot(*self)

		def __bool__(self):
		returnbool(abs(self))
		returnany(x != 0 for x inself)

		def __len__(self):
		return len(self._components)
Expand DownExpand Up		@@ -268,16 +327,30 @@ def angle(self, n): # <2>
		def angles(self): # <3>
		return (self.angle(n) for n in range(1, len(self)))

		maxlen = 30
		def __format__(self, fmt_spec=''):
		print_all = len(self) <= self.maxlen # whether print all numbers
		if fmt_spec.endswith('*'):
		fmt_spec = fmt_spec[:-1]
		print_all = True
		if fmt_spec.endswith('h'): # hyperspherical coordinates
		fmt_spec = fmt_spec[:-1]
		coords = itertools.chain([abs(self)],
		self.angles()) # <4>
		if print_all:
		coords = itertools.chain([abs(self)],
		self.angles()) # <4>
		else:
		coords = itertools.chain([abs(self)],
		itertools.islice(self.angles(), self.maxlen -1))
		outer_fmt = '<{}>' # <5>
		else:
		coords = self
		if print_all:
		coords = self
		else:
		coords = itertools.islice(self, self.maxlen)
		outer_fmt = '({})' # <6>
		components = (format(c, fmt_spec) for c in coords) # <7>
		if not print_all:
		components = itertools.chain(components, ['...'])
		return outer_fmt.format(', '.join(components)) # <8>

		@classmethod
Expand Down