YouTipPython Exercise Example52
# Python2.x Python Exercise Instance 52
[ Python 100 Examples](#)
**Question:** Learn to use the bitwise OR | .
**Program Analysis:** 0|0=0; 0|1=1; 1|0=1; 1|1=1
## Instance(Python 2.0+)
```python
#!/usr/bin/python
# -*- coding: UTF-8 -*-
if __name__ == ' __main__ ':
a = 0o77
b = a | 3
print('a | b is %d' % b)
b |= 7
print('a | b is %d' % b)
The output of the above instance is:
a | b is 63
a | b is 63
[![Image 4: Python 100 Examples](