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updated contents from Atlas repo

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This commit is contained in:
Luciano Ramalho
2014-10-14 14:26:55 -03:00
parent 40688c038d
commit 981d5bc473
157 changed files with 71134 additions and 1 deletions
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124
closures/global_x_local.rst Normal file
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>>> def f1(a):
... print(a)
... print(b)
...
>>> f1(3)
3
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 3, in f1
NameError: name 'b' is not defined
>>> b = 6
>>> f1(3)
3
6
>>> def f2(a):
... print(a)
... print(b)
... b = 9
...
>>> f2(3)
3
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 3, in f2
UnboundLocalError: local variable 'b' referenced before assignment
# BEGIN F1_DIS
>>> from dis import dis
>>> dis(f1)
2 0 LOAD_GLOBAL 0 (print) <1>
3 LOAD_FAST 0 (a) <2>
6 CALL_FUNCTION 1 (1 positional, 0 keyword pair)
9 POP_TOP
3 10 LOAD_GLOBAL 0 (print)
13 LOAD_GLOBAL 1 (b) <3>
16 CALL_FUNCTION 1 (1 positional, 0 keyword pair)
19 POP_TOP
20 LOAD_CONST 0 (None)
23 RETURN_VALUE
# END F1_DIS
# BEGIN F2_DIS
>>> dis(f2)
2 0 LOAD_GLOBAL 0 (print)
3 LOAD_FAST 0 (a)
6 CALL_FUNCTION 1 (1 positional, 0 keyword pair)
9 POP_TOP
3 10 LOAD_GLOBAL 0 (print)
13 LOAD_FAST 1 (b) <1>
16 CALL_FUNCTION 1 (1 positional, 0 keyword pair)
19 POP_TOP
4 20 LOAD_CONST 1 (9)
23 STORE_FAST 1 (b)
26 LOAD_CONST 0 (None)
29 RETURN_VALUE
# END F2_DIS
>>> def f3(a):
... global b
... print(a)
... print(b)
... b = 9
...
>>> f3(3)
3
6
>>> b
9
# BEGIN F3_DIS
>>> dis(f3)
3 0 LOAD_GLOBAL 0 (print)
3 LOAD_FAST 0 (a)
6 CALL_FUNCTION 1 (1 positional, 0 keyword pair)
9 POP_TOP
4 10 LOAD_GLOBAL 0 (print)
13 LOAD_GLOBAL 1 (b)
16 CALL_FUNCTION 1 (1 positional, 0 keyword pair)
19 POP_TOP
5 20 LOAD_CONST 1 (9)
23 STORE_GLOBAL 1 (b)
26 LOAD_CONST 0 (None)
29 RETURN_VALUE
# END F3_DIS
>>> def f4(b):
... def f5(a):
... nonlocal b
... print(a)
... print(b)
... b = 7
... return f5
...
>>> f5 = f4(8)
>>> f5(2)
2
8
>>> b
9
>>> f5(3)
3
7????
>>> dis(f5)
4 0 LOAD_GLOBAL 0 (print)
3 LOAD_FAST 0 (a)
6 CALL_FUNCTION 1 (1 positional, 0 keyword pair)
9 POP_TOP
5 10 LOAD_GLOBAL 0 (print)
13 LOAD_DEREF 0 (b)
16 CALL_FUNCTION 1 (1 positional, 0 keyword pair)
19 POP_TOP
6 20 LOAD_CONST 1 (7)
23 STORE_DEREF 0 (b)
26 LOAD_CONST 0 (None)
29 RETURN_VALUE