projects / OpenSPARC-T2-SAM / blame
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| 55 | <H2><A NAME="SECTION0071520000000000000000"></A><A NAME="set-example"></A> | |
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| 57 | 5.15.2 Example | |
| 58 | </H2> | |
| 59 | ||
| 60 | <P> | |
| 61 | <div class="verbatim"><pre> | |
| 62 | >>> from sets import Set | |
| 63 | >>> engineers = Set(['John', 'Jane', 'Jack', 'Janice']) | |
| 64 | >>> programmers = Set(['Jack', 'Sam', 'Susan', 'Janice']) | |
| 65 | >>> managers = Set(['Jane', 'Jack', 'Susan', 'Zack']) | |
| 66 | >>> employees = engineers | programmers | managers # union | |
| 67 | >>> engineering_management = engineers & managers # intersection | |
| 68 | >>> fulltime_management = managers - engineers - programmers # difference | |
| 69 | >>> engineers.add('Marvin') # add element | |
| 70 | >>> print engineers | |
| 71 | Set(['Jane', 'Marvin', 'Janice', 'John', 'Jack']) | |
| 72 | >>> employees.issuperset(engineers) # superset test | |
| 73 | False | |
| 74 | >>> employees.union_update(engineers) # update from another set | |
| 75 | >>> employees.issuperset(engineers) | |
| 76 | True | |
| 77 | >>> for group in [engineers, programmers, managers, employees]: | |
| 78 | ... group.discard('Susan') # unconditionally remove element | |
| 79 | ... print group | |
| 80 | ... | |
| 81 | Set(['Jane', 'Marvin', 'Janice', 'John', 'Jack']) | |
| 82 | Set(['Janice', 'Jack', 'Sam']) | |
| 83 | Set(['Jane', 'Zack', 'Jack']) | |
| 84 | Set(['Jack', 'Sam', 'Jane', 'Marvin', 'Janice', 'John', 'Zack']) | |
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