diff --git a/10-seq-hacking/vector_v5.py b/10-seq-hacking/vector_v5.py
index cf327bc..de659b5 100644
--- a/10-seq-hacking/vector_v5.py
+++ b/10-seq-hacking/vector_v5.py
@@ -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
@@ -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 in self))
+ return math.hypot(*self)
def __bool__(self):
- return bool(abs(self))
+ return any(x != 0 for x in self)
def __len__(self):
return len(self._components)
@@ -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
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