[FEA] support type float16
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feature request
libcudf
Python
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- C++
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Description
**Is your feature request related to a problem? Please describe.**
rewriting code from pandas with `import cudf as pd` and managing memory usage
**Describe the solution you'd like**
```
df['src'] = df['src'].astype('float16')
cudf/core/dtypes.py:51, in dtype(arbitrary)
...
TypeError: Unsupported type float16
```
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