Modules¶

Generated Thu 16 May 2019 04:48:09 UTC

array¶

Looking for integer not implemented¶

Sample code:

import array
print(1 in array.array('B', b'12'))

CPy output:	uPy output:
False	/bin/sh: 1: ../unix/micropython: not found

Array deletion not implemented¶

Sample code:

import array
a = array.array('b', (1, 2, 3))
del a[1]
print(a)

CPy output:	uPy output:
array('b', [1, 3])	/bin/sh: 1: ../unix/micropython: not found

Subscript with step != 1 is not yet implemented¶

Sample code:

import array
a = array.array('b', (1, 2, 3))
print(a[3:2:2])

CPy output:	uPy output:
array('b')	/bin/sh: 1: ../unix/micropython: not found

deque¶

Deque not implemented¶

Workaround: Use regular lists. micropython-lib has implementation of collections.deque.

Sample code:

import collections
D = collections.deque()
print(D)

CPy output:	uPy output:
deque([])	/bin/sh: 1: ../unix/micropython: not found

json¶

JSON module does not throw exception when object is not serialisable¶

Sample code:

import json
a = bytes(x for x in range(256))
try:
    z = json.dumps(a)
    x = json.loads(z)
    print('Should not get here')
except TypeError:
    print('TypeError')

CPy output:	uPy output:
TypeError	/bin/sh: 1: ../unix/micropython: not found

struct¶

Struct pack with too few args, not checked by uPy¶

Sample code:

import struct
try:
    print(struct.pack('bb', 1))
    print('Should not get here')
except:
    print('struct.error')

CPy output:	uPy output:
struct.error	/bin/sh: 1: ../unix/micropython: not found

Struct pack with too many args, not checked by uPy¶

Sample code:

import struct
try:
    print(struct.pack('bb', 1, 2, 3))
    print('Should not get here')
except:
    print('struct.error')

CPy output:	uPy output:
struct.error	/bin/sh: 1: ../unix/micropython: not found

sys¶

Overriding sys.stdin, sys.stdout and sys.stderr not possible¶

Cause: They are stored in read-only memory.

Sample code:

import sys
sys.stdin = None
print(sys.stdin)

CPy output:	uPy output:
None	/bin/sh: 1: ../unix/micropython: not found