Converting np.float to float

[codecov[bot]]

Codecov Report

Patch coverage: 70.00% and project coverage change: -0.02 :warning:

Comparison is base (0695e25) 62.01% compared to head (935ba14) 62.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #41 +/- ## ========================================== - Coverage 62.01% 62.00% -0.02% ========================================== Files 47 47 Lines 7401 7401 ========================================== - Hits 4590 4589 -1 - Misses 2811 2812 +1 ``` | [Impacted Files](https://app.codecov.io/gh/cedadev/cis/pull/41?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cedadev) | Coverage Δ | | |---|---|---| | [cis/collocation/kdtree.py](https://app.codecov.io/gh/cedadev/cis/pull/41?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cedadev#diff-Y2lzL2NvbGxvY2F0aW9uL2tkdHJlZS5weQ==) | `47.35% <50.00%> (ø)` | | | [cis/\_\_init\_\_.py](https://app.codecov.io/gh/cedadev/cis/pull/41?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cedadev#diff-Y2lzL19faW5pdF9fLnB5) | `27.58% <100.00%> (ø)` | | | [cis/data\_io/ungridded\_data.py](https://app.codecov.io/gh/cedadev/cis/pull/41?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cedadev#diff-Y2lzL2RhdGFfaW8vdW5ncmlkZGVkX2RhdGEucHk=) | `79.37% <100.00%> (ø)` | | | [cis/subsetting/subset.py](https://app.codecov.io/gh/cedadev/cis/pull/41?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cedadev#diff-Y2lzL3N1YnNldHRpbmcvc3Vic2V0LnB5) | `94.44% <100.00%> (ø)` | | | [cis/time\_util.py](https://app.codecov.io/gh/cedadev/cis/pull/41?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cedadev#diff-Y2lzL3RpbWVfdXRpbC5weQ==) | `82.00% <100.00%> (ø)` | | ... and [1 file with indirect coverage changes](https://app.codecov.io/gh/cedadev/cis/pull/41/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cedadev)

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