the sleepy snake
index :: num :: BitArray
class BitArray?
wrapper class for bit handling . The class handles up to 32 bits, bits exceeding this limit are ignored
The BitArray class defines the following attributes:
| value | integer value of the bit array |
The BitArray class defines the following methods:
| __init__(initval=0) | constructor |
| __int__() | returns the array as integer |
| __invert__() | toggles all bits in the array |
| __long__() | returns the array as long integer |
| __lshift__(n) | shifts the array n bits to the left |
| __nonzero__() | checks if the array is empty |
| __rshift__(n) | shifts the array n bits to the right |
| __and__(integer) | bitwise and |
| __or__(integer) | bitwise or |
| __xor__(integer) | bitwise xor |
| __repr__() | returns the array as string representing the bits of the array |
| __getitem__(n) | returns the n'th bit of the array |
| __setitem__(n, flag) | adjusts the n'th bit of the array |
| __len__() | returns the total number of bits in the array |
| clear() | clears all bits in the array |
| count() | returns the number of bits set in the array |
sample code
arr = BitArray() arr[3] = 1 # set third bit >> '100' arr[1] = 2 # toggle 2nd bit >> '101' arr[:] = 1 # set all bits >> '11111111111111111111111111111111' arr.clear() # clear all bits >> '0' MY_FLAG_1 = 0 MY_FLAG_32 = 31 arr = BitArray() arr[MY_FLAG_1] = 1 print arr[MY_FLAG_1] >> 1