Complex64 implicitly converted to Complex128 · Issue #10952 · pandas-dev/pandas (original) (raw)

NumPy array of complex64 is implicitly converted to complex128 when used as data for DataFrame:

a=np.random.randn(10).astype(np.complex64) a.dtype dtype('complex64') pd.DataFrame({'a': a}).a.dtype dtype('complex128')

The problem does not affect Series:

In [7]: Series(a).dtype Out[7]: dtype('complex64')