59 specific ways For Python

1. verify the python version.
2. follow pep8.
3. unicode/bytes/str difference.
4. use func to replace complex expression.
5. understand: list/sequence slice.
6. Be careful about: slice: start,end, stride.
7. Use list expression to replace map/filter.
8. Not complex list expression.
9. use generator to replace huge list expression.
10. use enumerate, avoid range.
11. Use zip for iterate generator.
12. No else after while/for.
13. try/except/else/finally
14. use exception to handle special scene, neither None.
15. 闭包,元组比较,作用域bug 16.

examples:

def sort_values(values, group):
    def helper(x):
        if x in group:
            return (0, x)
        return (1,x)

    values.sort(key=helper)


numbers = [2,3,6,3,4,1]
group = {2,3,1}

print(sort_values(numbers, group))