monty 0.0.21

A sandboxed, snapshotable Python interpreter written in Rust.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162

# === Hash returns int type ===
assert isinstance(hash(42), int)
assert isinstance(hash('hello'), int)
assert isinstance(hash((1, 2, 3)), int)
assert isinstance(hash(3.14), int)

# === Hash consistency for same values ===
assert hash(42) == hash(42)
assert hash(-1) == hash(-1)
assert hash(0) == hash(0)
assert hash('hello') == hash('hello')
assert hash('') == hash('')
assert hash(b'hello') == hash(b'hello')
assert hash(b'') == hash(b'')
assert hash(None) == hash(None)
assert hash(True) == hash(True)
assert hash(False) == hash(False)
assert hash((1, 2, 3)) == hash((1, 2, 3))
assert hash(()) == hash(())
assert hash((1,)) == hash((1,))
assert hash(3.14) == hash(3.14)
assert hash(0.0) == hash(0.0)
assert hash(-0.0) == hash(-0.0)
assert hash(...) == hash(...)

# === Range hash consistency ===
assert hash(range(10)) == hash(range(10))
assert hash(range(0)) == hash(range(0))
assert hash(range(1, 10)) == hash(range(1, 10))
assert hash(range(1, 10, 2)) == hash(range(1, 10, 2))
assert hash(range(-5, 5)) == hash(range(-5, 5))

# === Different range values should hash differently ===
assert hash(range(10)) != hash(range(11))
assert hash(range(10)) != hash(range(1, 10))
assert hash(range(10)) != hash(range(0, 10, 2))
assert hash(range(1, 10, 2)) != hash(range(1, 10, 3))

# === Different values should hash differently ===
assert hash(1) != hash(2)
assert hash('a') != hash('b')
assert hash(b'a') != hash(b'b')
assert hash((1, 2)) != hash((1, 3))
assert hash((1, 2)) != hash((2, 1))
assert hash(True) != hash(False)
assert hash(3.14) != hash(2.71)

# === Type differentiation for clearly different types ===
assert hash(()) != hash('')
assert hash('1') != hash(1)
assert hash(b'1') != hash(1)

# === Nested tuple hashing ===
assert hash((1, (2, 3))) == hash((1, (2, 3)))
assert hash((1, (2, 3))) != hash((1, (2, 4)))
assert hash(((1, 2), (3, 4))) == hash(((1, 2), (3, 4)))

# === String/bytes content equality across representations ===
# Interned strings and heap strings with same content should hash the same
s1 = 'test'
s2 = 'te' + 'st'
assert hash(s1) == hash(s2)

b1 = b'test'
b2 = b'te' + b'st'
assert hash(b1) == hash(b2)


# === Function hashing ===
def f():
    pass


def g():
    pass


assert hash(f) == hash(f)
assert hash(g) == hash(g)
assert hash(f) != hash(g)

# === Builtin function hashing ===
assert hash(len) == hash(len)
assert hash(print) == hash(print)
assert hash(len) != hash(print)

# === Builtin type hashing ===
assert hash(int) == hash(int)
assert hash(str) == hash(str)
assert hash(int) != hash(str)
assert hash(int) != hash(float)

# === Exception type hashing ===
assert hash(ValueError) == hash(ValueError)
assert hash(TypeError) == hash(TypeError)
assert hash(ValueError) != hash(TypeError)

# === Dict key behavior with hashes ===
# Verify that hash consistency works with dict lookups
d = {}
d[42] = 'int'
d['hello'] = 'str'
d[(1, 2)] = 'tuple'
d[range(5)] = 'range'
d[3.14] = 'float'
d[None] = 'none'

assert d[42] == 'int'
assert d['hello'] == 'str'
assert d[(1, 2)] == 'tuple'
assert d[range(5)] == 'range'
assert d[3.14] == 'float'
assert d[None] == 'none'

# === Multiple ranges as dict keys ===
rd = {}
rd[range(5)] = 'a'
rd[range(10)] = 'b'
rd[range(1, 5)] = 'c'
rd[range(0, 5, 2)] = 'd'

assert rd[range(5)] == 'a'
assert rd[range(10)] == 'b'
assert rd[range(1, 5)] == 'c'
assert rd[range(0, 5, 2)] == 'd'
assert len(rd) == 4


# === Functions as dict keys ===
def key_fn():
    pass


fd = {}
fd[key_fn] = 'func_value'
assert fd[key_fn] == 'func_value'

# === Builtins as dict keys ===
bd = {}
bd[len] = 'len_value'
bd[print] = 'print_value'
assert bd[len] == 'len_value'
assert bd[print] == 'print_value'
assert len(bd) == 2

# === Types as dict keys ===
td = {}
td[int] = 'int_type'
td[str] = 'str_type'
td[ValueError] = 'value_error'
assert td[int] == 'int_type'
assert td[str] == 'str_type'
assert td[ValueError] == 'value_error'

# Types which compare equal should hash the same
assert hash(1) == hash(True) and 1 == True, 'int 1 and bool True hash and compare equal'
assert hash(0) == hash(False) and 0 == False, 'int 0 and bool False hash and compare equal'
assert hash(-0.0) == hash(0.0) and -0.0 == 0.0, 'float -0.0 and 0.0 hash and compare equal'
assert hash(1) == hash(1.0) and 1 == 1.0, 'int 1 and float 1.0 hash and compare equal'
assert hash(0) == hash(0.0) and 0 == 0.0, 'int 0 and float 0.0 hash and compare equal'
assert hash(0.0) == hash(False) and 0.0 == False, 'float 0.0 and bool False hash and compare equal'
assert hash(1.0) == hash(True) and 1.0 == True, 'float 1.0 and bool True hash and compare equal'