Code Sample, a copy-pastable example if possible
http://stackoverflow.com/questions/39129419/why-does-dataframe-construction-break-python-on-numpy-empty-like
import numpy as np
import pandas as pd
a = np.array([None, None], dtype=object)
print(a) # [None None]
dfa = pd.DataFrame(a)
print(dfa)
# 0
#0 None
#1 None
b = np.empty_like(a)
print(b)
#[None None]
(a == b).all()
#True
dfb = pd.DataFrame(b) # Fine so far
print(dfb.values)
#[[None]
#[None]]
print(dfb) #Crash
Expected Output
output of pd.show_versions()
INSTALLED VERSIONS
------------------
commit: None
python: 3.5.1.final.0
python-bits: 64
OS: Windows
OS-release: 10
machine: AMD64
processor: Intel64 Family 6 Model 61 Stepping 4, GenuineIntel
byteorder: little
LC_ALL: None
LANG: None
pandas: 0.18.1
nose: None
pip: 8.1.2
setuptools: 18.2
Cython: None
numpy: 1.11.1
scipy: 0.17.1
statsmodels: None
xarray: None
IPython: None
sphinx: None
patsy: None
dateutil: 2.5.3
pytz: 2016.4
blosc: None
bottleneck: None
tables: None
numexpr: None
matplotlib: 1.5.1
openpyxl: None
xlrd: None
xlwt: None
xlsxwriter: None
lxml: None
bs4: 4.5.0
html5lib: None
httplib2: None
apiclient: None
sqlalchemy: None
pymysql: None
psycopg2: None
jinja2: 2.8
boto: None
pandas_datareader: None
Comment From: jreback
duplicate of #13717 and fixed by #13764 in master / not-yet-released 0.19.0