possible np.round bug

[BMeridian]

Code Sample, a copy-pastable example if possible

Worked in prior versions...

import pandas as pd

raw_data = {'regiment': ['Nighthawks', 'Nighthawks', 'Nighthawks', 'Nighthawks', 'Dragoons', 'Dragoons', 'Dragoons', 'Dragoons', 'Scouts', 'Scouts', 'Scouts', 'Scouts'],
        'company': ['infantry', 'infantry', 'cavalry', 'cavalry', 'infantry', 'infantry', 'cavalry', 'cavalry','infantry', 'infantry', 'cavalry', 'cavalry'],
        'experience': ['veteran', 'rookie', 'veteran', 'rookie', 'veteran', 'rookie', 'veteran', 'rookie','veteran', 'rookie', 'veteran', 'rookie'],
        'name': ['Miller', 'Jacobson', 'Ali', 'Milner', 'Cooze', 'Jacon', 'Ryaner', 'Sone', 'Sloan', 'Piger', 'Riani', 'Ali'],
        'preTestScore': [4, 24, 31, 2, 3, 4, 24, 31, 2, 3, 2, 3],
        'postTestScore': [25, 94, 57, 62, 70, 25, 94, 57, 62, 70, 62, 70]}
df = pd.DataFrame(raw_data, columns = ['regiment', 'company', 'experience', 'name', 'preTestScore', 'postTestScore'])

import numpy as np
np.round(df.regiment,1)

Expected Output

a number

ERROR !!!! not a numpy bug..

TypeError Traceback (most recent call last)

in () 1 2 import numpy as np ----> 3 np.round(df.regiment,1) /Library/Python/2.7/site-packages/numpy/core/fromnumeric.pyc in round_(a, decimals, out) 2791 except AttributeError: 2792 return _wrapit(a, 'round', decimals, out) -> 2793 return round(decimals, out) 2794 2795 TypeError: round() takes at most 2 arguments (3 given) #### output of `pd.show_versions()` ## INSTALLED VERSIONS commit: None python: 2.7.5.final.0 python-bits: 64 OS: Darwin OS-release: 13.4.0 machine: x86_64 processor: i386 byteorder: little LC_ALL: None LANG: en_US.UTF-8 pandas: 0.18.0 nose: None pip: 8.1.1 setuptools: 20.9.0 Cython: None numpy: 1.11.0 scipy: 0.17.0 statsmodels: None xarray: None IPython: 4.2.0 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: None html5lib: None httplib2: None apiclient: None sqlalchemy: None pymysql: None psycopg2: None jinja2: 2.8 boto: None

[jreback]

dupe of #12600 already fixed in #12603

[jreback]

you should just use .round() in any event