pybind11/example/example-sequences-and-iterators.py

#!/usr/bin/env python
from __future__ import print_function
import sys
sys.path.append('.')

from example import Sequence, StringMap

s = Sequence(5)
print("s = " + str(s))
print("len(s) = " + str(len(s)))
print("s[0], s[3] = %f %f" % (s[0], s[3]))
print('12.34 in s: ' + str(12.34 in s))
s[0], s[3] = 12.34, 56.78
print('12.34 in s: ' + str(12.34 in s))
print("s[0], s[3] = %f %f" % (s[0], s[3]))
rev = reversed(s)
rev2 = s[::-1]
print("rev[0], rev[1], rev[2], rev[3], rev[4] = %f %f %f %f %f" % (rev[0], rev[1], rev[2], rev[3], rev[4]))

for i in rev:
    print(i, end=' ')
print('')
for i in rev2:
    print(i, end=' ')
print('')
print(rev == rev2)
rev[0::2] = Sequence([2.0, 2.0, 2.0])
for i in rev:
    print(i, end=' ')
print('')

m = StringMap({ 'hi': 'bye', 'black': 'white' })
print(m['hi'])
print(len(m))
print(m['black'])
try:
    print(m['orange'])
    print('Error: should have thrown exception')
except KeyError:
    pass
m['orange'] = 'banana'
print(m['orange'])

for k in m:
    print("key = %s, value = %s" % (k, m[k]))

for k,v in m.items():
    print("item: (%s, %s)" % (k,v))

from example import ConstructorStats
cstats = ConstructorStats.get(Sequence)
print("Instances not destroyed:", cstats.alive())
s = None
print("Instances not destroyed:", cstats.alive())
rev = None
print("Instances not destroyed:", cstats.alive())
rev2 = None
print("Instances not destroyed:", cstats.alive())
print("Constructor values:", cstats.values())
print("Default constructions:", cstats.default_constructions)
print("Copy constructions:", cstats.copy_constructions)
print("Move constructions:", cstats.move_constructions >= 1)
print("Copy assignments:", cstats.copy_assignments)
print("Move assignments:", cstats.move_assignments)