This is the documentation for the latest development branch of MicroPython and may refer to features that are not available in released versions.

If you are looking for the documentation for a specific release, use the drop-down menu on the left and select the desired version.

builtins – 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()
class bool
class bytearray
class bytes

See CPython documentation: bytes.

callable()
chr()
classmethod()
compile()
class complex
delattr(obj, name)

The argument name should be a string, and this function deletes the named attribute from the object given by obj.

class dict
dir()
divmod()
enumerate()
eval()
exec()
filter()
class float
class frozenset
getattr()
globals()
hasattr()
hash()
hex()
id()
input()
class int
classmethod 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).

Note

The optional signed kwarg from CPython is not supported. MicroPython currently converts negative integers as signed, and positive as unsigned. (Details.)

isinstance()
issubclass()
iter()
len()
class list
locals()
map()
max()
class memoryview
min()
next()
class object
oct()
open()
ord()
pow()
print()
property()
range()
repr()
reversed()
round()
class set
setattr()
class slice

The slice builtin is the type that slice objects have.

sorted()
staticmethod()
class str
sum()
super()
class tuple
type()
zip()

Exceptions

exception AssertionError
exception AttributeError
exception Exception
exception ImportError
exception IndexError
exception KeyboardInterrupt
exception KeyError
exception MemoryError
exception NameError
exception NotImplementedError
exception OSError
exception RuntimeError
exception StopIteration
exception SyntaxError
exception SystemExit

See CPython documentation: SystemExit.

exception TypeError

See CPython documentation: TypeError.

exception ValueError
exception ZeroDivisionError