Python pandas for reading in file with date -

-

in dataframe below, 3rd line header , y, m , d columns giving year month , day respectively. however, not able read them in using code:

df = pandas.read_csv(file_name, skiprows = 2, index_col='datetime',                   parse_dates={'datetime': [0,1,2]},                   date_parser=lambda x: pandas.datetime.strptime(x, '%y %m %d')) 
         oth-000.opc               xkn1=    0.500000e-01     y   m   d     prcp     vwc1      2006   1   1      0.0  0.17608e+00  2006   1   2      6.0  0.21377e+00  2006   1   3      0.1  0.22291e+00  2006   1   4      3.0  0.23460e+00  2006   1   5      6.7  0.26076e+00

i keyerror: list index out of range. suggestions?

the default separator in read_csv comma. file doesn't use commas separators, you're getting 1 big column:

>>> pd.read_csv(file_name, skiprows = 2)        y   m   d     prcp     vwc1     0   2006   1   1      0.0  0.17608e+00 1   2006   1   2      6.0  0.21377e+00 2   2006   1   3      0.1  0.22291e+00 3   2006   1   4      3.0  0.23460e+00 4   2006   1   5      6.7  0.26076e+00 >>> pd.read_csv(file_name, skiprows = 2).columns index([u'    y   m   d     prcp     vwc1    '], dtype='object')

you should able use delim_whitespace=true:

>>> df = pd.read_csv(file_name, skiprows = 2, delim_whitespace=true,                      parse_dates={"datetime": [0,1,2]}, index_col="datetime") >>> df             prcp     vwc1 datetime                  2006-01-01   0.0  0.17608 2006-01-02   6.0  0.21377 2006-01-03   0.1  0.22291 2006-01-04   3.0  0.23460 2006-01-05   6.7  0.26076 >>> df.index <class 'pandas.tseries.index.datetimeindex'> [2006-01-01, ..., 2006-01-05] length: 5, freq: none, timezone: none

(i didn't specify date_parser, because i'm lazy , read correctly default, it's not bad habit explicit.)


Comments

Post a Comment

Popular posts from this blog

c++ - No viable overloaded operator for references a map -

-
i trying use map can make tag names reference number. when try , use it, in code error (6 in total every time reference map): src/main.cpp:25:45: error: no viable overloaded operator[] type 'std::map<std::string, std::string>' const char* idcs = node.child_value(tagmap[3]); this code: #include "pugi/pugixml.hpp" #include <iostream> #include <string> #include <map> int main() { pugi::xml_document doca, docb; std::map<std::string, pugi::xml_node> mapa, mapb; std::map<std::string, std::string> tagmap {{"1", "data"}, {"2", "entry"}, {"3", "id"}, {"4", "content"}}; if (!doca.load_file("a.xml") || !docb.load_file("b.xml")) { std::cout << "can't find input files"; return 1; } (auto& node: doca.child(tagmap[1]).children(tagmap[2])) { co
Read more

java - Custom OutputStreamAppender not run: LOGBACK: No context given for <MYAPPENDER> -

-
i wish write custom appender on basis of outputstreamappender . wrote following class package tests; import java.io.ioexception; import java.io.outputstream; import ch.qos.logback.core.outputstreamappender; public class myappender<e> extends outputstreamappender<e> { public myappender() { system.out.println("myappender created"); setoutputstream(new outputstream() { @override public void write(int b) throws ioexception { throw new unsupportedoperationexception(); } }); } } then wrote following runner: package tests; import org.slf4j.loggerfactory; import ch.qos.logback.classic.logger; public class runner { private static final logger log = (logger) loggerfactory.getlogger(runner.class); public static void main(string[] args) { //log.addappender(new myappender<iloggingevent>()); log.info("hello world"); } } finall
Read more

java - Cannot secure connection using TLS -

-
i'm trying establish secure socket connection between java client applet (built jdk 1.7.0_75-b13) , vc++ server application. as test vehicle, used vc++ client/server sample found in msdn forums, modified use schannel , able establish socket using cipher suite tls_rsa_with_aes_128_cbc_sha. works of tls 1.0/1.1/1.2. when try opening socket java applet same server application, connection rejected server reporting following: tls 1.0 acceptsecuritycontext failed: 0x80090327 tls 1.1 acceptsecuritycontext failed: 0x80090331 tls 1.2 acceptsecuritycontext failed: 0x80090331 this java code used create socket: debugprint("setting secure connection"); sslsocketfactory sslsocketfactory = (sslsocketfactory) sslsocketfactory.getdefault(); sslsocket sslsocket = (sslsocket) sslsocketfactory.createsocket("127.0.0.1", socketnumber); debugprint("starting handshake"); sslsocket.settcpnodelay(true); sslsocket.setsolinger(false, 0); sslsocket.s
Read more