tree 38b5a6d735bab45e777f7ba812fa75480eb518a8
parent 549dfc93fb7e3d6d8566064a60a6069deae5c8eb
author Masayuki Igawa <masayuki@igawa.me> 1491812522 +0900
committer Masayuki Igawa <masayuki@igawa.me> 1492408984 +0900
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Use sequence directly instead of using len()

This commit makes to use sequence directly instead of using
len(SEQUENCE). The original code works correctly, and it's really
straight forward. However, PEP8 recommends like below[1]. And it
makes code more simple, too.

```
For sequences, (strings, lists, tuples), use the fact that empty
sequences are false.

Yes: if not seq:
     if seq:

No: if len(seq):
    if not len(seq):
```

[1] https://www.python.org/dev/peps/pep-0008/#programming-recommendations

Change-Id: I8d41e16d82b1b3860a98e5217cb7a541fc83b907