Making The Road Wiki

>>> json = """{"hoge" : 1, "fuga" : [1, 2, 3]}"""
>>> json
'{"hoge" : 1, "fuga" : [1, 2, 3]}'
>>> eval(json)
{'fuga': [1, 2, 3], 'hoge': 1}
>>> eval(json)["fuga"]
[1, 2, 3]

>>> (1,2,3)
(1, 2, 3)
>>> (1,2)
(1, 2)
>>> (1) ;; これはNG
1
>>> (1,) ;; これはOK
(1,)
>>> len((1))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: object of type 'int' has no len()
>>> len((1,))
1

A = [[0 for j in range(m)] for i in range(n)]

python -i

import os
os.environ['HOME']