3c4bfd1dec
This commit adds the errno attribute to exceptions, so code can retrieve errno codes from an OSError using exc.errno. The implementation here simply lets `errno` (and the existing `value`) attributes work on any exception instance (they both alias args[0]). This is for efficiency and to keep code size down. The pros and cons of this are: Pros: - more compatible with CPython, less difference to document and learn - OSError().errno will correctly return None, whereas the current way of doing it via OSError().args[0] will raise an IndexError - it reduces code size on most bare-metal ports (because they already have the errno qstr) - for Python code that uses exc.errno the generated bytecode is 2 bytes smaller and more efficient to execute (compared with exc.args[0]); so bytecode loaded to RAM saves 2 bytes RAM for each use of this attribute, and bytecode that is frozen saves 2 bytes flash/ROM for each use - it's easier/shorter to type, and saves 2 bytes of space in .py files that use it (for each use) Cons: - increases code size by 4-8 bytes on minimal ports that don't already have the `errno` qstr - all exceptions now have .errno and .value attributes (a cpydiff test is added to address this) See also #2407. Signed-off-by: Damien George <damien@micropython.org>
2.7 KiB
Builtin functions and exceptions
All builtin functions and exceptions are described here. They are
also available via builtins module.
Functions and types
abs()
all()
any()
bin()
python:bytes.
callable()
chr()
classmethod()
compile()
delattr(obj, name)
The argument name should be a string, and this function deletes the named attribute from the object given by obj.
dir()
divmod()
enumerate()
eval()
exec()
filter()
getattr()
globals()
hasattr()
hash()
hex()
id()
input()
from_bytes(bytes, byteorder)
In MicroPython, byteorder parameter must be positional (this is compatible with CPython).
to_bytes(size, byteorder)
In MicroPython, byteorder parameter must be positional (this is compatible with CPython).
isinstance()
issubclass()
iter()
len()
locals()
map()
max()
min()
next()
oct()
open()
ord()
pow()
print()
property()
range()
repr()
reversed()
round()
setattr()
The slice builtin is the type that slice objects have.
sorted()
staticmethod()
sum()
super()
type()
zip()
Exceptions
AssertionError
AttributeError
Exception
ImportError
IndexError
KeyboardInterrupt
KeyError
MemoryError
NameError
NotImplementedError
OSError
RuntimeError
StopIteration
SyntaxError
SystemExit
python:SystemExit.
TypeError
python:TypeError.
ValueError
ZeroDivisionError