python - A better way to do it in Pandas, I have 2 loops -


new pandas ; there better way ?

import pandas pd import numpy np stringio import stringio  devices = stringio("""name;date;cpu;freq;voltage rpi;201501;arm;700mhz;5v galileo;201501;intel;400mhz;3.3v uno;201502;atmel;16mhz;5v """) d = pd.dataframe.from_csv(devices, sep=';', index_col=none)  comments = stringio("""comment;t1;t2;t3 cool;arm;; great!;atmel;; great!;intel;5v; fun;atmel;16mhz; fun;700mhz;atmel; """) c = pd.dataframe.from_csv(comments, sep=';', index_col=none)  n = d.copy() n['cool'], n['great!'], n['fun'] = 0, 0, 0  i, row in n.iterrows():     j, com in c.iterrows():         if np.all(np.in1d(np.array(com[['t1', 't2', 't3']].dropna()), np.array(row))):             n.loc[i, c.loc[j, 'comment']] = 1

at end, build new dataframe n, , looks that:

    name    date    cpu     freq    voltage     cool    great!  fun 0   rpi     201501  arm     700mhz  5v          1       0       0 1   galileo 201501  intel   400mhz  3.3v        0       0       0 2   uno     201502  atmel   16mhz   5v          0       1       1

the other df, d , c that

    name    date    cpu     freq    voltage 0   rpi     201501  arm     700mhz  5v 1   galileo 201501  intel   400mhz  3.3v 2   uno     201502  atmel   16mhz   5v      comment     t1      t2      t3 0   cool        arm     nan     nan 1   great!      atmel   nan     nan 2   great!      intel   5v      nan 3   fun         atmel   16mhz   nan 4   fun         700mhz  atmel   nan

i have use 2 loops it. breaks dream of pandas! better? must missing something..

c['val'] = 1  comments = pd.pivot_table(c,index='t1',columns='comment',                             values='val',aggfunc=sum).fillna(0)  df = pd.merge(d,comments,left_on='cpu',right_index=true,how='left')

comments:

comment  cool  fun  great! t1                         700mhz      0    1       0 arm         1    0       0 atmel       0    1       1 intel       0    0       1

df:

      name    date    cpu    freq voltage  cool  fun  great! 0      rpi  201501    arm  700mhz      5v     1    0       0 1  galileo  201501  intel  400mhz    3.3v     0    0       1 2      uno  201502  atmel   16mhz      5v     0    1       1

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