python小记

>>> a='abcde'
>>> len(a)
5
>>>

>>> for i in range(1,3):
 print(i)

1
2
>>> for i in range(3):
 print(i)

0
1
2


>>> a
[1, 2, 3, 4, 5]
>>> a[0]
1
>>> b=(1,2,3,4,5,6)
>>> b(0)
Traceback (most recent call last):
  File "", line 1, in
    b(0)
TypeError: 'tuple' object is not callable
>>> b[0]
1
>>>

>>> a
[1, 2, 3, 4, 5]
>>> a.append(10)
>>> a
[1, 2, 3, 4, 5, 10]
>>> del a[5]
>>> a
[1, 2, 3, 4, 5]
>>>

>>> a=[['da', 'a', 's', 's', 'f', 'g'], [1.0, 2.0, 3.0, 4.0, 5.0, 6.0]]
>>> a[1][1]
2.0
>>>