Improve example data layout and README

client/qldbtools/qldbtools/session-4-unique.py

@@ -5,7 +5,7 @@ import pandas as pd
 # cd ../
 
 #* Reload CSV file to continue work
-df2 = df_refined = pd.read_csv('db-info-2.csv')
+df2 = df_refined = pd.read_csv('scratch/db-info-2.csv')
 
 # Identify rows missing specific entries
 rows = ( df2['cliVersion'].isna() | 
@@ -17,7 +17,7 @@ df3 = df2[~rows]
 df3
 
 #* post-save work
-df4 = pd.read_csv('db-info-3.csv')
+df4 = pd.read_csv('scratch/db-info-3.csv')
 
 # Sort and group
 df_sorted = df4.sort_values(by=['owner', 'name', 'CID', 'creationTime'])

client/qldbtools/qldbtools/session-generate-selection.py

@@ -13,7 +13,7 @@ import numpy as np
 import importlib
 importlib.reload(utils)
 
-df0 = pd.read_csv('db-info-3.csv')
+df0 = pd.read_csv('scratch/db-info-3.csv')
 
 # Use num_entries, chosen via pseudo-random numbers
 df1 = df0.sample(n=3, random_state=np.random.RandomState(4242))

client/qldbtools/qldbtools/session-populate-minio.py

@@ -9,7 +9,7 @@ from pathlib import Path
 #
 #* Collect the information and select subset
 #
-df = pd.read_csv('db-info-2.csv')
+df = pd.read_csv('scratch/db-info-2.csv')
 seed = 4242
 if 0:
     # Use all entries

client/qldbtools/qldbtools/session-post-refine-info.py

@@ -4,7 +4,7 @@ import pandas as pd
 #
 #* Collect the information
 #
-df1 = pd.read_csv("db-info-2.csv")
+df1 = pd.read_csv("scratch/db-info-2.csv")
 
 # Add single uniqueness field -- CID (Cumulative ID) -- using
 # - creationTime