Pandas Update a Column Based on Range

between.py

table_1 = pd.DataFrame({'Slab_ID': np.repeat('1_1',19), 'ActCastLength':np.arange(1.1,3,0.1)})

table_2 = pd.DataFrame({'Slab_ID': ['1_1','1_1'], 'DefectStart_Y':[1.5,2.3],\
                        'DefectEnd_Y':[1.8,2.5], 'Defective':[1,1]})

for c in np.arange(2):
    table_1['Defective' + str(c)] = table_1['ActCastLength'].between(table_2.loc[c,'DefectStart_Y'],\
                                                                     table_2.loc[c, 'DefectEnd_Y'])
    table_1['Defective' + str(c)] = [1 if x == True else 0 for x in table_1['Defective'+str(c)]]
    
table_1['Defective'] = table_1['Defective0'] + table_1['Defective1']
table_1.drop(['Defective0','Defective1'], inplace=True, axis=1)

Unprogammatic solution, but works.