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Some small tweaks while reading the code#37
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guoqiao wants to merge 4 commits intojuju-solutions:masterfrom
Open
Some small tweaks while reading the code#37guoqiao wants to merge 4 commits intojuju-solutions:masterfrom
guoqiao wants to merge 4 commits intojuju-solutions:masterfrom
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In py2:
sorted(iterable[, cmp[, key[, reverse]]])
In py3:
sorted(iterable, *, key=None, reverse=False)
The `cmp` arg is removed in py3.
Also, it's much slower than `key` since `cmp` is called multiple times
for each list element(O(n^2)), while `key` touch each element only once(O(n)).
Replace `cmp` with `key` as a keyword arg, this make `sorted` faster and
also python 2/3 compatible.
Signed-off-by: Joe Guo <guoqiao@gmail.com>
In py2:
dict.items() -> list
dict.iteritems() -> iterator
iteritems() is preferred for less memory usage in py2.
In py3:
dict.items() -> iterator
dict.iteritems() -> removed
Use items() instead of iteritems(), to be python 2/3 compatible.
In py2, the returned list may use more memory, but shouldn't be problem
in this case.
Didn't use six, which is unnecessary here and introduce noise in code.
Signed-off-by: Joe Guo <guoqiao@gmail.com>
make use of maxsplit arg to get db name and the rest in one line. Signed-off-by: Joe Guo <guoqiao@gmail.com>
make use of defaultdict(dict) to avoid key check each time. Signed-off-by: Joe Guo <guoqiao@gmail.com>
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Small improvements, could be worthy.