python - First Value in Pandas DatetimeIndex is Unsearchable -


i have simple series:

>>> sub_dim_metrics date 2017-04-04 00:00:00+00:00     32.38 2017-04-03 00:00:00+00:00    246.28 2017-04-02 00:00:00+00:00    146.25 2017-04-01 00:00:00+00:00    201.98 2017-03-31 00:00:00+00:00    274.74 2017-03-30 00:00:00+00:00    257.82 2017-03-29 00:00:00+00:00    279.38 2017-03-28 00:00:00+00:00    203.53 2017-03-27 00:00:00+00:00    250.65 2017-03-26 00:00:00+00:00    180.59 2017-03-25 00:00:00+00:00    196.61 2017-03-24 00:00:00+00:00    281.04 2017-03-23 00:00:00+00:00    276.44 2017-03-22 00:00:00+00:00    227.55 2017-03-21 00:00:00+00:00    267.59 name: area, dtype: float64 >>> sub_dim_metrics.index datetimeindex(['2017-04-04', '2017-04-03', '2017-04-02', '2017-04-01',                '2017-03-31', '2017-03-30', '2017-03-29', '2017-03-28',                '2017-03-27', '2017-03-26', '2017-03-25', '2017-03-24',                '2017-03-23', '2017-03-22', '2017-03-21'],               dtype='datetime64[ns, utc]', name=u'date', freq=none)

later in code retrieve area specific days using following format: sub_dim_metrics['2017-04-02'], example.

before retrieve area day, first verify requested date in series, so: if '2017-04-02' in sub_dim_metrics.index

my problem first value in index not return true, while rest do:

>>> '2017-04-02' in sub_dim_metrics.index true >>> '2017-04-04' in sub_dim_metrics.index false

why , best way verify date in series before retrieving corresponding value?

iiuc:

you getting false when expect true:
checking whether string in datetime index. apparently pandas loose check , tries you. it's getting wrong though, isn't it.

plan 1
right!

pd.to_datetime('2017-04-04') in sub_dim_metrics.index  true

plan 2
think unsorted-ness throwing off. sort_values first.

'2017-04-04' in sub_dim_metrics.index.sort_values()  true

setup 

from io import stringio import pandas pd  txt = """2017-04-04 00:00:00+00:00     32.38 2017-04-03 00:00:00+00:00    246.28 2017-04-02 00:00:00+00:00    146.25 2017-04-01 00:00:00+00:00    201.98 2017-03-31 00:00:00+00:00    274.74 2017-03-30 00:00:00+00:00    257.82 2017-03-29 00:00:00+00:00    279.38 2017-03-28 00:00:00+00:00    203.53 2017-03-27 00:00:00+00:00    250.65 2017-03-26 00:00:00+00:00    180.59 2017-03-25 00:00:00+00:00    196.61 2017-03-24 00:00:00+00:00    281.04 2017-03-23 00:00:00+00:00    276.44 2017-03-22 00:00:00+00:00    227.55 2017-03-21 00:00:00+00:00    267.59"""  sub_dim_metrics = pd.read_csv(stringio(txt),     sep='\s{2,}', engine='python',     index_col=0, parse_dates=[0],     header=none, names=['date', 'area'],     squeeze=true)

Comments

Post a Comment

Popular posts from this blog

inversion of control - Autofac named registration constructor injection -

does autofac support specifying registration name in components' constructors? example: ninject's namedattribute . you need use autofac.extras.attributed package on top achieve this so let's have 1 interface , 2 classes: public interface ihello { string sayhello(); } public class englishhello : ihello { public string sayhello() { return "hello"; } } public class frenchhello : ihello { public string sayhello() { return "bonjour"; } } then have consumer class, in want select instance injected: public class helloconsumer { private readonly ihello helloservice; public helloconsumer([withkey("en")] ihello helloservice) { if (helloservice == null) { throw new argumentnullexception("helloservice"); } this.helloservice = helloservice; } public string sayhello() { return this.helloservice.sayhello()...
Read more

verilog - Systemverilog dynamic casting issues -

i've code snippet following in testbench function void write_to_port( my_data_type_base data ); my_data_type_extended data_ext; if(!$cast(data_ext, data)); `uvm_error(get_type_name(), "failed cast"); `uvm_info(get_name(), $psprintf("data_ext :\n%s", data_ext.sprint()), uvm_medium) // write data_ext out port.... endfunction when run it, i'm getting uvm_error "failed cast." i'm not quire sure why $cast not returning 1. can see, i'm printing out extended class data item after casting uvm_info. can see it's being cast properly. if don't use $cast if condition, don't runtime error. isn't coding practice use if dynamic cast check if $cast returning 1 ? what might reason behind cast not returning 1 in above case? i think semicolon on line 'if' not belong? i think consumes if statement, , uvm_error executes regardless of how if evaluates: if(!$cast(data_ext, data)); <- no semico...
Read more

ios - Change Storyboard View using Seague -

i have following code checks connection server, , depending on want change views if no connection found. nsstring *connect = [nsstring stringwithcontentsofurl:[nsurl urlwithstring:@"http://myserver.com"] encoding:nsutf8stringencoding error:nil]; if (connect == null) { [self performseguewithidentifier:@"network_failure" sender:self]; } else { // other code here } my problem not change views. have added storyboard segue between 2 views identifier of network_failure . not have navigation controller or that, problem? thanks help! no not problem. first of all, in objectivec exists nil object oriented null . must use that. so: if(connect == nil) or better: if(!connect) so due fact nil not same of null , probably code does't enter in if scope . you have been able discover breakpoint. anyway: be sure set trigger segue (line) 2 view controller , , name network_failure (that not best name. should instead view1toview2 ) as, m...
Read more