code: # individual nan corrected
  # Final nan matches highest probable label (optional)
  
  import pandas as pd
  import numpy as np
  from tqdm import tqdm
  import matplotlib.pyplot as plt
  
  SAMPLE = '../input/sample_submission.csv'
  
  label_names = {
          0:  "Nucleoplasm",
          1:  "Nuclear membrane",
          2:  "Nucleoli",
          3:  "Nucleoli fibrillar center",
          4:  "Nuclear speckles",
          5:  "Nuclear bodies",
          6:  "Endoplasmic reticulum",
          7:  "Golgi apparatus",
          8:  "Peroxisomes",
          9:  "Endosomes",
          10:  "Lysosomes",
          11:  "Intermediate filaments",
          12:  "Actin filaments",
          13:  "Focal adhesion sites",
          14:  "Microtubules",
          15:  "Microtubule ends",
          16:  "Cytokinetic bridge",
          17:  "Mitotic spindle",
          18:  "Microtubule organizing center",
          19:  "Centrosome",
          20:  "Lipid droplets",
          21:  "Plasma membrane",
          22:  "Cell junctions",
          23:  "Mitochondria",
          24:  "Aggresome",
          25:  "Cytosol",
          26:  "Cytoplasmic bodies",
          27:  "Rods & rings"
      }
  
  column_sum = []
  sub_name = []
  
  def expand(csv):
      sub = pd.read_csv(csv)
      print(csv, sub.isna().sum())
  
      sub = sub.replace(pd.np.nan, '101')
      sub[f'target_vec'] = sub['Predicted'].map(lambda x: list(map(int, x.strip().split())))
      for i in range(28):
          sub[f'{label_names[i]}'] = sub['Predicted'].map(
                   lambda x: 1 if str(i) in x.strip().split() else 0)
      sub = sub.values
      sub = np.delete(sub, [1, 2], axis=1)
  
      a = sub[:, 1:]
      unique, counts = np.unique(a, return_counts=True)
      print('Unique counts:',np.asarray((unique, counts)).T)
      print('Total labels:{} Class-wise:{}'.format(a.sum(), a.sum(axis=0)))
      column_sum.append( a.sum(axis=0))
      sub_name.append(csv)
      return sub
  
  #======================================================================================================================
  # Input submissions
  #====================================================================================================================
  sub_dir = 'sub_dir_team/'
  
  #enstw39b
  df_1 =  expand('sub_dir_team/leak_brian_tommy_en_res34swa_re50xt_re101xtswa_wrn_4.8_562.csv') #1 +1
  df_2 =  expand( 'sub_dir_team/Christof_blend_4_580.csv') #2 +3
  df_3 =  expand('sub_dir_team/ens85bd_russ_616.csv') # 3 +3
  df_4 =  expand('sub_dir_team/enspreds103_12mdl_512-256_wtth0.45_leak_shai_593.csv') # 2+2
  df_5 =  expand('sub_dir_team/hill_m94d_dmytro_627.csv') # 3
  df_6 =  expand('sub_dir_team/voted_5_d_kevin_602.csv') #2 +2
  df_7 =  expand('sub_dir_team/hill_b93d_l2_615update.csv') #1
  df_8 =  expand('sub_dir_team/submission_loss_5fold_mean_2_GAP_chrs_602.csv') #2
  
  df_9 =  expand('sub_dir_team/hill_b92d_l2_615.csv') #1
  df_10 =  expand('sub_dir_team/hill_m92d_dmytro_617.csv') # 3
  
  # enstw36
  # df_1 =  expand('sub_dir_team/leak_brian_tommy_en_res34swa_re50xt_re101xtswa_wrn_4.8_562.csv') #1
  # df_2 =  expand( 'sub_dir_team/Christof_blend_4_580.csv') #3
  # df_3 =  expand('sub_dir_team/ens85bd_russ_616.csv') #3
  # df_4 =  expand('sub_dir_team/enspreds103_12mdl_512-256_wtth0.45_leak_shai_593.csv') #2
  # df_5 =  expand('sub_dir_team/hill_m92d_dmytro_617.csv') # 3
  # df_6 =  expand('sub_dir_team/voted_5_d_kevin_602.csv') #2
  # df_7 =  expand('sub_dir_team/hill_b92d_l2_615.csv') #1
  #=======================================================================================================================
  # Visualize distribution
  #=======================================================================================================================
  # list =[0,1,2,3,4,5,6,7]
  # colors = ['r', 'g', 'b', 'c', 'm', 'y', 'k', 'orange']
  # w=0
  # for i in list:
  #     x = np.arange(0, 28, 1)
  #     plt.bar(x+w, column_sum[i],width = 0.08, color = colors[i], label=sub_name[i], )
  #     w=w+0.09
  # plt.legend()
  # plt.grid(True)
  # plt.yscale('log')
  # plt.show()
  
  #=======================================================================================================================
  #=======================================================================================================================
  sum = df_1[:, 1:]*2 + \
        df_2[:, 1:]*5 + \
        df_3[:, 1:]*6 + \
        df_4[:, 1:]*4 + \
        df_5[:, 1:]*3 + \
        df_6[:, 1:]*4 + \
        df_7[:, 1:]*1 + \
        df_8[:, 1:]*2 + \
        df_9[:, 1:]*1 + \
        df_10[:, 1:]*3
  
  vote = 15 #7 15/31
  
  #=======================================================================================================================
  # Selecting most probable label for nan rows
  #=======================================================================================================================
  # sum_tmp = sum.copy()
  # for i,row in enumerate(sum):
  #   #print (str(row))
  #   #print(max(row))
  #   #print(row.argmax(axis=0))
  #   row_max_idx = row.argmax(axis=0)
  #   if max(row)<vote:
  #       #row[row_max_idx] = vote
  #       sum[i,row_max_idx] = vote
  #       #print(str(row))
  # diff = sum-sum_tmp
  #=======================================================================================================================
  
  vote_sub0  = np.where(sum[:,0]  >= vote,    1, 0)      #high
  vote_sub1  = np.where(sum[:,1]  >= vote,    1, 0)
  vote_sub2  = np.where(sum[:,2]  >= vote,    1, 0)
  vote_sub3  = np.where(sum[:,3]  >= vote,    1, 0)
  vote_sub4  = np.where(sum[:,4]  >= vote,    1, 0)
  vote_sub5  = np.where(sum[:,5]  >= vote,    1, 0)
  vote_sub6  = np.where(sum[:,6]  >= vote,    1, 0)
  vote_sub7  = np.where(sum[:,7]  >= vote,    1, 0)
  vote_sub8  = np.where(sum[:,8]  >= vote,    1, 0)      #low
  vote_sub9  = np.where(sum[:,9]  >= vote,    1, 0)      #low
  vote_sub10 = np.where(sum[:,10] >= vote,    1, 0)      #low
  vote_sub11 = np.where(sum[:,11] >= vote,    1, 0)
  vote_sub12 = np.where(sum[:,12] >= vote,    1, 0)
  vote_sub13 = np.where(sum[:,13] >= vote,    1, 0)
  vote_sub14 = np.where(sum[:,14] >= vote,    1, 0)
  vote_sub15 = np.where(sum[:,15] >= vote + 2,    1, 0)      #low
  vote_sub16 = np.where(sum[:,16] >= vote,    1, 0)
  vote_sub17 = np.where(sum[:,17] >= vote,    1, 0)
  vote_sub18 = np.where(sum[:,18] >= vote,    1, 0)
  vote_sub19 = np.where(sum[:,19] >= vote,    1, 0)
  vote_sub20 = np.where(sum[:,20] >= vote,    1, 0)
  vote_sub21 = np.where(sum[:,21] >= vote,    1, 0)
  vote_sub22 = np.where(sum[:,22] >= vote,    1, 0)
  vote_sub23 = np.where(sum[:,23] >= vote,    1, 0)
  vote_sub24 = np.where(sum[:,24] >= vote,    1, 0)
  vote_sub25 = np.where(sum[:,25] >= vote,    1, 0)      #high
  vote_sub26 = np.where(sum[:,26] >= vote,    1, 0)
  vote_sub27 = np.where(sum[:,27] >= vote,    1, 0)      #low
  
  vote_sub = np.column_stack((vote_sub0,  vote_sub1,  vote_sub2,  vote_sub3,
                              vote_sub4,  vote_sub5,  vote_sub6,  vote_sub7,
                              vote_sub8,  vote_sub9,  vote_sub10, vote_sub11,
                              vote_sub12, vote_sub13, vote_sub14, vote_sub15,
                              vote_sub16, vote_sub17, vote_sub18, vote_sub19,
                              vote_sub20, vote_sub21, vote_sub22, vote_sub23,
                              vote_sub24, vote_sub25, vote_sub26, vote_sub27)
                             )
  #======================================================================================================================
  # prepare submission format
  #======================================================================================================================
  submit = pd.read_csv(SAMPLE)
  prediction = []
  
  for row in tqdm(range(submit.shape[0])):
  
      str_label = ''
  
      for col in range(vote_sub.shape[1]):
          if (vote_sub[row, col] < 1):
              str_label += ''
          else:
              str_label += str(col) + ' '
      prediction.append(str_label.strip())
  
  submit['Predicted'] = np.array(prediction)
  #submit.to_csv('sub_dir_team/test.csv', index=False)
  submit.to_csv('sub_dir_team/enstw40_642blend.csv', index=False)
  
  #=======================================================================================================================
apis: pandas.read_csv numpy.column_stack numpy.asarray numpy.delete numpy.array numpy.where numpy.unique