python - pandas df.apply TypeError data type not understood -


i'm trying apply operation every value in datetime series. i've reduced lambda print illustrate problem. works in similar dataframe not on one? python version 3.5.1, pandas version 0.17.1.

some more padding satisfy question verbosity requirement.

print(dfy.info()) print(dfy) dfy.apply(lambda rr: print(rr['predicted_time']), 1)

output

<class 'pandas.core.frame.dataframe'> int64index: 21 entries, 0 20 data columns (total 1 columns): predicted_time    21 non-null datetime64[ns, pytz.fixedoffset(60)] dtypes: datetime64[ns, pytz.fixedoffset(60)](1) memory usage: 336.0 bytes none               predicted_time 0  2005-02-01 02:40:00+01:00 1  2005-02-01 02:40:00+01:00 2  2005-02-01 02:40:00+01:00 3  2005-02-01 02:40:00+01:00 4  2005-02-01 02:43:00+01:00 5  2005-02-01 02:43:00+01:00 6  2005-02-01 02:43:00+01:00 <snip> 19 2005-02-01 02:50:00+01:00 20 2005-02-01 02:50:00+01:00  --------------------------------------------------------------------------- typeerror                                 traceback (most recent call last) <ipython-input-43-8ae0cf570812> in <module>()       1 print(dfy.info())       2 print(dfy) ----> 3 dfy.apply(lambda rr: print(rr['predicted_time']), 1)  /.../projects/software/timetillcomplete/venv/lib/python3.5/site-packages/pandas/core/frame.py in apply(self, func, axis, broadcast, raw, reduce, args, **kwds)    3970                     if reduce none:    3971                         reduce = true -> 3972                     return self._apply_standard(f, axis, reduce=reduce)    3973             else:    3974                 return self._apply_broadcast(f, axis)  /.../projects/software/timetillcomplete/venv/lib/python3.5/site-packages/pandas/core/frame.py in _apply_standard(self, func, axis, ignore_failures, reduce)    4017             # create dummy series empty array    4018             index = self._get_axis(axis) -> 4019             empty_arr = np.empty(len(index), dtype=values.dtype)    4020             dummy = series(empty_arr, index=self._get_axis(axis),    4021                            dtype=values.dtype)  typeerror: data type not understood

i don't known what's going on, workaround can expected output calling apply()on column:

dfy['predicted_time'].apply(lambda rr: print(rr))

edit looks hit bug in pandas. issue triggered using time zone aware timestamps in dataframe. using series works seen above. using naive timestamps works:

df = pd.dataframe(pd.series(dfy['predicted_time'].values),                   columns=['predicted_time']) df.apply(lambda rr: print(rr['predicted_time']), 1)

Comments

Post a Comment

Popular posts from this blog

sublimetext3 - what keyboard shortcut is to comment/uncomment for this script tag in sublime -

Image
i have script tag in code, keyboard shortcut comment/uncomment script tag in sublime. after selecting script open , close tag. <script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"> </script> i pressing ctrl + shift + / , getting this /*<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"> </script>*/ also pressed ctrl + / , got this // <script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"> // </script> instead of <!-- <script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"> </script> --> script open , close tag in 2 lines not in 1 line , not have spaces too. for mac,high light lines want comment. hold 'command , / ' commented. for windows: high line or select lines ,then hold ctrl + / if not work: ...
Read more

java - No use of nillable="0" in SOAP Webservice -

i have received xsd 3rd party supplier generated java based system; used create soap endpoint receive data transfers. xsd not make use of nillable attribute defined within w3c/xsd namespace, example: <xs:complextype name="customer"> <xs:sequence> <xs:element minoccurs="1" maxoccurs="1" name="id" type="xs:integer"/> <xs:element minoccurs="0" maxoccurs="1" name="titleid" type="xs:integer"/> <xs:element minoccurs="0" maxoccurs="1" name="firstname" type="xs:string"/> <xs:element minoccurs="0" maxoccurs="1" name="familyname" type="xs:string"/> <xs:element minoccurs="0" maxoccurs="1" name="previousname" type="xs:string"/> <xs:element minoccurs="0" maxoccurs="1" nam...
Read more

ubuntu - Laravel 5.2 quickstart guide gives Not Found Error -

edit: think problem due not setting apache properly, these 2 links helped me. solution: http://laravel.io/forum/06-11-2014-not-found-but-route-exists https://www.digitalocean.com/community/tutorials/how-to-set-up-apache-virtual-hosts-on-ubuntu-14-04-lts end edit i'm following laravel 5.2 quickstart guide. https://laravel.com/docs/5.2/quickstart i'm running ubuntu 14.04.2 the website runs initially, when click on add task button run 404 not found error. as per guide run following commands setup complete quickstart project. git clone https://github.com/laravel/quickstart-basic quickstart cd quickstart composer install php artisan migrate additionally run following commands because i'm on ubuntu server: sudo chown -r www-data.www-data quickstart sudo chmod -r 755 quickstart sudo chmod 777 quickstart/storage the routes.php file looks like: <?php use app\task; use illuminate\http\request; route::group(['middleware' => ['web']]...
Read more