exstore: PraxisVS partially

2 files changed, 657 insertions, 255 deletions

diff --git a/ReckonPrimer.activity/data/Collection.data b/ReckonPrimer.activity/data/Collection.data
index 29b71b7..4d296f9 100644
--- a/ReckonPrimer.activity/data/Collection.data
+++ b/ReckonPrimer.activity/data/Collection.data
@@ -11,223 +11,653 @@ p4
 (dp5
 g2
 (lp6
-sS'_pic'
+(icollection
+Collection
 p7
+(dp8
+g2
+(lp9
+(icollection
+Collection
+p10
+(dp11
+g2
+(lp12
+(itask
+Task
+p13
+(dp14
+S'_eval'
+p15
+(lp16
+sS'_sett'
+p17
+(dp18
+S'cut-max'
+p19
+I01
+sS':'
+p20
+I00
+sS'icon'
+p21
+NsS'title'
+p22
+S'2-er Reihe'
+p23
+sS'shuffle_all'
+p24
+I01
+sS'MAX'
+p25
+I50
+sS'*commute'
+p26
+I00
+sS'*'
+p27
+I01
+sS'descript'
+p28
+S'settings: series (2,4,8 is possible!) of *, "in" and : with remainder, series 11..19 (left bar),series 10..90 (right long bar), separate shuffling or operands.'
+p29
+sS'factors'
+p30
+(lp31
+I2
+asS'topic'
+p32
+S'times_div'
+p33
+sS'MIN'
+p34
+I10
+sS'in'
+p35
+I01
+sS'vadd'
+p36
+I0
+sS'shuffle_inner'
+p37
+I01
+sS'remainder'
+p38
+I00
+sS'vmult'
+p39
+I1
+sS'calclines'
+p40
+I1
+ssba(itask
+Task
+p41
+(dp42
+g15
+(lp43
+sg17
+(dp44
+g19
+I01
+sg20
+I00
+sg21
+Nsg22
+S'3-er Reihe'
+p45
+sg24
+I01
+sg25
+I50
+sg26
+I00
+sg27
+I01
+sg28
+g29
+sg30
+(lp46
+I3
+asg32
+g33
+sg34
+I10
+sg35
+I01
+sg36
+I0
+sg37
+I01
+sg38
+I00
+sg39
+I1
+sg40
+I1
+ssba(itask
+Task
+p47
+(dp48
+g15
+(lp49
+sg17
+(dp50
+g19
+I01
+sg20
+I00
+sg21
+Nsg22
+S'4-er Reihe'
+p51
+sg24
+I01
+sg25
+I50
+sg26
+I00
+sg27
+I01
+sg28
+g29
+sg30
+(lp52
+I4
+asg32
+g33
+sg34
+I10
+sg35
+I01
+sg36
+I0
+sg37
+I01
+sg38
+I00
+sg39
+I1
+sg40
+I1
+ssba(itask
+Task
+p53
+(dp54
+g15
+(lp55
+sg17
+(dp56
+g19
+I01
+sg20
+I00
+sg21
+Nsg22
+S'5-er Reihe'
+p57
+sg24
+I01
+sg25
+I50
+sg26
+I00
+sg27
+I01
+sg28
+g29
+sg30
+(lp58
+I5
+asg32
+g33
+sg34
+I10
+sg35
+I01
+sg36
+I0
+sg37
+I01
+sg38
+I00
+sg39
+I1
+sg40
+I1
+ssba(itask
+Task
+p59
+(dp60
+g15
+(lp61
+sg17
+(dp62
+g19
+I01
+sg20
+I00
+sg21
+Nsg22
+S'6-er Reihe'
+p63
+sg24
+I01
+sg25
+I50
+sg26
+I00
+sg27
+I01
+sg28
+g29
+sg30
+(lp64
+I6
+asg32
+g33
+sg34
+I10
+sg35
+I01
+sg36
+I0
+sg37
+I01
+sg38
+I00
+sg39
+I1
+sg40
+I1
+ssba(itask
+Task
+p65
+(dp66
+g15
+(lp67
+sg17
+(dp68
+g19
+I01
+sg20
+I00
+sg21
+Nsg22
+S'7-er Reihe'
+p69
+sg24
+I01
+sg25
+I50
+sg26
+I00
+sg27
+I01
+sg28
+g29
+sg30
+(lp70
+I7
+asg32
+g33
+sg34
+I10
+sg35
+I01
+sg36
+I0
+sg37
+I01
+sg38
+I00
+sg39
+I1
+sg40
+I1
+ssba(itask
+Task
+p71
+(dp72
+g15
+(lp73
+sg17
+(dp74
+g19
+I01
+sg20
+I00
+sg21
+Nsg22
+S'8-er Reihe'
+p75
+sg24
+I01
+sg25
+I50
+sg26
+I00
+sg27
+I01
+sg28
+g29
+sg30
+(lp76
+I8
+asg32
+g33
+sg34
+I10
+sg35
+I01
+sg36
+I0
+sg37
+I01
+sg38
+I00
+sg39
+I1
+sg40
+I1
+ssba(itask
+Task
+p77
+(dp78
+g15
+(lp79
+sg17
+(dp80
+g19
+I01
+sg20
+I00
+sg21
+Nsg22
+S'9-er Reihe'
+p81
+sg24
+I01
+sg25
+I50
+sg26
+I00
+sg27
+I01
+sg28
+g29
+sg30
+(lp82
+I9
+asg32
+g33
+sg34
+I10
+sg35
+I01
+sg36
+I0
+sg37
+I01
+sg38
+I00
+sg39
+I1
+sg40
+I1
+ssbasS'_pic'
+p83
 NsS'_title'
-p8
-S'Praxis Volksschule'
-p9
+p84
+S"Einzelne Reihen . und 'in'"
+p85
 sS'_description'
-p10
-S'Rechenuebungen fuer die 1. und 2.Klasse, festgelegt 16.Dez.09'
-p11
+p86
+S' '
+p87
+sba(icollection
+Collection
+p88
+(dp89
+g2
+(lp90
+sg83
+Nsg84
+S'Mehrere Reihen .'
+p91
+sg86
+S'Wir ueben zusammengehoerende Reihen.'
+p92
+sba(icollection
+Collection
+p93
+(dp94
+g2
+(lp95
+sg83
+Nsg84
+S'Alle Reihen gemischt'
+p96
+sg86
+g87
+sbasg83
+Nsg84
+S"Uebungen . und 'in' "
+p97
+sg86
+g87
+sba(icollection
+Collection
+p98
+(dp99
+g2
+(lp100
+sg83
+Nsg84
+S'Uebungen :'
+p101
+sg86
+g87
+sba(icollection
+Collection
+p102
+(dp103
+g2
+(lp104
+sg83
+Nsg84
+S'Uebungen + und - '
+p105
+sg86
+g87
+sbasg83
+Nsg84
+S'Praxis Volksschule'
+p106
+sg86
+S'Rechenuebungen fuer die 1. und 2.Klasse, festgelegt am 16.Dez.09 mit Nina Jaklitsch und Arndt Stoeckl .'
+p107
 sba(icollection
 Collection
-p12
-(dp13
+p108
+(dp109
 g2
-(lp14
-sg7
-Nsg8
+(lp110
+sg83
+Nsg84
 S'Schoenberger'
-p15
-sg10
+p111
+sg86
 S'Most efficient introduction to the four basic arithmetic                operations as taught by Igo Schoenberger in the last century                in Upper Austria.'
-p16
+p112
 sba(icollection
 Collection
-p17
-(dp18
+p113
+(dp114
 g2
-(lp19
+(lp115
 (itask
 Task
-p20
-(dp21
-S'_eval'
-p22
-(lp23
-sS'_sett'
-p24
-(dp25
+p116
+(dp117
+g15
+(lp118
+sg17
+(dp119
 S'min'
-p26
+p120
 I0
 sS'=input'
-p27
-(lp28
+p121
+(lp122
 I1
 aI3
 aI5
-asS'cut-max'
-p29
+asg19
 I01
 sS'_+_=_'
-p30
+p123
 I01
-sS'title'
-p31
-S'template: + - within 10'
-p32
-sS'MAX'
-p33
+sg22
+S'Template: + - within 10'
+p124
+sg25
 I100
 sS'+'
-p34
+p125
 I01
-sS'MIN'
-p35
+sg34
 I20
-sS'descript'
-p36
+sg28
 S'settings: range of result, input at 3 positions, swap around ='
-p37
+p126
 sS'input='
-p38
-(lp39
+p127
+(lp128
 I1
 aI3
 aI5
-asS'topic'
-p40
+asg32
 S'addsub_simp'
-p41
-sS'calclines'
-p42
+p129
+sg40
 I1
 sS'-'
-p43
+p130
 I01
 sS'max'
-p44
+p131
 I1
 sS'_=_+_'
-p45
+p132
 I00
 sS'shuffle'
-p46
-I01
-sS'icon'
-p47
+p133
+I00
+sg21
 Nssba(itask
 Task
-p48
-(dp49
-g22
-(lp50
-sg24
-(dp51
-g26
+p134
+(dp135
+g15
+(lp136
+sg17
+(dp137
+g120
 I2
-sg29
+sg19
 I01
 sS'newline'
-p52
+p138
 I01
-sg31
-S'template: passing the 10 barrier with + -'
-p53
-sS'shuffle_all'
-p54
+sg22
+S'Template: + - passing the 10 barrier'
+p139
+sg24
 I00
-sg33
+sg25
 I150
-sg34
+sg125
 I01
-sg35
+sg34
 I10
-sg36
+sg28
 S'settings: range of 1st operand, input left and right from =, input intermediate result, separate shuffling of operands.'
-p55
-sg40
+p140
+sg32
 S'passten'
-p56
-sg42
+p141
+sg40
 I1
-sg43
+sg130
 I00
-sg44
+sg131
 I2
 sS'input'
-p57
-(lp58
+p142
+(lp143
 I3
-asS'shuffle_inner'
-p59
+asg37
 I00
-sg47
+sg21
 Nssba(itask
 Task
-p60
-(dp61
-g22
-(lp62
-sg24
-(dp63
-g26
-I2
-sg44
+p144
+(dp145
+g15
+(lp146
+sg17
+(dp147
+g30
+(lp148
 I2
-sS'*'
-p64
+aI4
+asg37
 I00
-sg31
-S'template: * ; in'
-p65
-sg54
+sg27
+I00
+sg22
+S'Template: * : "in" series'
+p149
+sg24
 I00
-sg33
+sg25
 I50
-sS'*commute'
-p66
+sg26
 I00
-sg35
+sg34
 I10
+sg28
+g29
 sg36
-S'settings: series (2,4,8 is possible!) of *,                           "in" and : with remainder, series 11..19 (left bar),                          series 10..90 (right long bar), separate shuffling                           or operands.'
-p67
-sS'vadd'
-p68
 I0
+sg32
+g33
 sg40
-S'times_div'
-p69
-sS'factors'
-p70
-(lp71
-I2
-aI4
-asg59
-I00
-sg42
 I1
-sS'in'
-p72
+sg35
 I00
-sg29
+sg19
 I01
-sS':'
-p73
+sg20
 I01
-sS'remainder'
-p74
+sg38
 I00
-sS'vmult'
-p75
+sg39
 I1
-sg47
-Nssbasg7
-Nsg8
+sg21
+Nssbasg83
+Nsg84
 S'Templates'
-p76
-sg10
+p150
+sg86
 S'These are the (classes of) exercises all others are derived                from. Thus, please, do not deletem them.                For testing exercises disabling of @ is recommended.'
-p77
-sbasg7
-Nsg8
+p151
+sbasg83
+Nsg84
 S'root = invisible node'
-p78
-sg10
+p152
+sg86
 S'required by tree structure'
-p79
+p153
 sb.
\ No newline at end of file
diff --git a/ReckonPrimer.activity/exstore.py b/ReckonPrimer.activity/exstore.py
index 53d64ce..ad59c69 100644
--- a/ReckonPrimer.activity/exstore.py
+++ b/ReckonPrimer.activity/exstore.py
@@ -31,114 +31,65 @@ class ExStore:
         self._display = display
         self._coach = coach
         self._active_exerc = None
-        #self._sett = Settings()
-        #Provisorium für die "3-Button-Version" vvvvvvvvvvvvvvvvvvvvvvvvv
-        #self._data = [(self._sett.get_setting('addsub_simp'), []),
-        #              (self._sett.get_setting('passten'),     []),
-        #              (self._sett.get_setting('times_div'),   [])]
-        #Provisorium für die "3-Button-Version" ^^^^^^^^^^^^^^^^^^^^^^^^^
         #Provisorium für impl. "treeView-Kollektion" vvvvvvvvvvvvvvvvvvvv
-#        _ex010 = Task({'topic'  : 'addsub_simp',
-#         'title' : 'template exaddsimp',
-#         'descript': 'addition and subtraction without carry, \
-#                            i.e. without passing the 10 barrier. ',
-#         'icon' : None,     # for quick reference of the exercise      
-#         'calclines': 1,    # no. of lines for calc to be input.
-#         'MAX'    : 30,     # maximum of calcs generated.
-#                            # Generate fills up by varying input.
-#         'MIN'    : 20,     # minimum of calcs generated UNUSED
-#         'min'    : 0,      # minimum in size of a number in a calc
-#         'max'    : 1,      # maximum  in size of a number in a calc
-#                            # 0 <= min <= max <= 10
-#         '+'      : True,   # make all additions min..max
-#         '-'      : True,   # make all subtactions min..max
-#         '_+_=_'  : True,   # = is _right_ from operator, e.g. 1+2=3
-#         'input=' : [1,3,5],# list of positions in calc: 1 | 3 | 5
-#                            # where input is possible;
-#                            # actual positions chosen by Generate.
-#         '_=_+_'  : False,  # = is _left_ from operator, e.g. 3=1+2
-#         '=input' : [1,3,5],# analogous to '_+_=_'
-#         'shuffle': True,   # shuffle _all_ the calcs
-#         'cut-max': True    # cut set of all calcs down to MAX
-#        }, [])
-#        _ex011 = Task({'topic'        : 'passten',
-#         'title' : 'template expassten',
-#         'descript': 'addition and subtraction with carry, \
-#                            i.e. with passing the 10 barrier. ',
-#         'icon' : None,     # for quick reference of the exercise      
-#         'calclines'    : 1,      # or 2 iff 'newline' : True.
-#         'MAX'          : 150,    # maximum of calcs generated;
-#                                  # TODO: Generate fills up by varying input.
-#         'MIN'          : 10,     # minimum of calcs generated 090416WN:UNUSED
-#         '+'            :True,   # + crossing the ten barrier!!
-#         '-'            :False,   # - goes below the ten barrier!!!
-#                                  # (i.e. iteration on left arg. is "outer" loop)
-#         'min'          : 2,   # +: minimum in size of number in left argument
-#         #'min'          : 5,   # +: minimum in size of number in left argument
-#                                  # -: minimum in size of result
-#         'max'          : 2,   # +: maximum in size of number in left argument
-#                                  # -: maximum in size of result
-#         #'max'          : 9,   # +: maximum in size of number in left argument
-#         'input'        :[3],  # list of positions in calc 3 | 5
-#                                  # where input is possible; 
-#                                  # actual positions chosen by Generate.
-#         'newline'      : True,    # display 2nd line for intermediate results
-#         'shuffle_all'  : False,   # shuffle all calcs  
-#         'shuffle_inner': False,   # shuffle only 1st (inner) iteration
-#         'cut-max'      : True   # cut set of all calcs down to MAX
-#        }, [])
-#        _ex012 = Task({'topic'        : 'times_div', #for programmers only
-#         'title' : 'template extimesdiv',
-#         'descript': 'multiplication, division and "in" \
-#                            from 2 to 19 and 20 to 190. ',
-#         'icon' : None,     # for quick reference of the exercise      
-#         'calclines'    : 1,      # no. of lines for calc to be input.
-#         'MAX'          : 50,    # maximum of calcs generated;
-#                                  # TODO: Generate fills up by varying input.
-#         'MIN'          : 10,     # minimum of calcs generated 090416WN:UNUSED
-#         '*'            : False,   # eg.  7 . 2 =_
-#         '*commute'     : False,  # commute the operands 2 . 7 = _
-#         ':'            : True,  # 14 : 2 = _
-#         'in'           : False,  # 2 in 14 = _
-#         'remainder'    : False,  # : | in ... with remainder
-#         'vadd'         : 0,      # 0 or 10, for 1.11 ... 1.19
-#         'vmult'        : 1,      # 1 or 10, for 1.10 ... 1.90
-#         'min'          : 2,      # +: minimum number in right *operand
-#                                  # -: minimum result
-#         'max'          : 2,      # +: maximum number in right *operand
-#                                  # -: maximum result
-#	     'factors'	: [2,4], # Liste mit ausgewählten zahlen zur berechnung
-#         'shuffle_all'  : False,   # shuffle all calcs  
-#         'shuffle_inner': False,   # shuffle only 1st (inner) iteration
-#         'cut-max'      : True   # cut set of all calcs down to MAX
-#        }, [])
-#
-#        _coll00 = Collection("Add Sub: + & -",
-#                             "hier sind alle 1x1-Reihen mit 'in'",
-#                             None, [])
-#
-#        _coll01 = Collection("Times Division: x & in",
-#                             "hier sind alle 1x1-Reihen mit 'in'",
-#                             None, [_ex010, _ex011, _ex012])
-#
-#        _coll02 = Collection("Pass Ten: ->10",
-#                             "hier sind alle 1x1-Reihen mit 'in'",
-#                             None, [])
-#
-#        _coll0 = Collection("Templates",
-#                            "Hier finden Sie alle verfügbaren Templates",
-#                            None, [_coll00, _coll01, _coll02])
-#
-#        #constructor of collections root
-#        self._root = \
-#Collection("root = invisible node",
-#           "aber benötigt zum richtigen speichern/lesen",
-#           None, [
-#  _coll0, _coll0])
 
 
+####### _c1 ##################################################################
+####### _c1c1c1t #############################################################
+        _sett = {'topic'    : 'times_div', 
+         'title'        : '99-er Reihe',
+         'descript'     : 'settings: series (2,4,8 is possible!) of *, "in" and : with remainder, series 11..19 (left bar),series 10..90 (right long bar), separate shuffling or operands.',
+         'icon'         : None,  
+         'calclines'    : 1,     
+         'MAX'          : 50,    
+                                 
+         'MIN'          : 10,    
+         '*'            : True, 
+         '*commute'     : False, 
+         ':'            : False,  
+         'in'           : False, 
+         'remainder'    : False, 
+         'vadd'         : 0,     
+         'vmult'        : 1,     
+	 'factors'	: [99], 
+         'shuffle_all'  : True, 
+         'shuffle_inner': True, 
+         'cut-max'      : True   
+                        }
+        _sett['factors'] = [2]; _sett['title'] = '2-er Reihe'
+        _c1c1c1t2 = Task(copy.deepcopy(_sett), [])
+        _sett['factors'] = [3]; _sett['title'] = '3-er Reihe'
+        _c1c1c1t3 = Task(copy.deepcopy(_sett), [])
+        _sett['factors'] = [4]; _sett['title'] = '4-er Reihe'
+        _c1c1c1t4 = Task(copy.deepcopy(_sett), [])
+        _sett['factors'] = [5]; _sett['title'] = '5-er Reihe'
+        _c1c1c1t5 = Task(copy.deepcopy(_sett), [])
+        _sett['factors'] = [6]; _sett['title'] = '6-er Reihe'
+        _c1c1c1t6 = Task(copy.deepcopy(_sett), [])
+        _sett['factors'] = [7]; _sett['title'] = '7-er Reihe'
+        _c1c1c1t7 = Task(copy.deepcopy(_sett), [])
+        _sett['factors'] = [8]; _sett['title'] = '8-er Reihe'
+        _c1c1c1t8 = Task(copy.deepcopy(_sett), [])
+        _sett['factors'] = [9]; _sett['title'] = '9-er Reihe'
+        _c1c1c1t9 = Task(copy.deepcopy(_sett), [])
+####### _c1c1c2t #############################################################
+        _sett['factors'] = [2,4]; _sett['title'] = '2,4-er Reihe'
+        _c1c1c2t1 = Task(copy.deepcopy(_sett), [])
+        _sett['factors'] = [2,4,8]; _sett['title'] = '2,4,8-er Reihe'
+        _c1c1c2t2 = Task(copy.deepcopy(_sett), [])
+        #_sett['factors'] = [5,10]; _sett['title'] = '-er Reihe'
+        #_c1c1c2t2 = Task(copy.deepcopy(_sett), [])
+        _sett['factors'] = [3,6]; _sett['title'] = '3,6-er Reihe'
+        _c1c1c2t3 = Task(copy.deepcopy(_sett), [])
+        _sett['factors'] = [3,6,9]; _sett['title'] = '3,6,9-er Reihe'
+        _c1c1c2t4 = Task(copy.deepcopy(_sett), [])
+####### _c1c1c3t #############################################################
+
+
+####### _c2 ##################################################################
+####### _c3 ##################################################################
         _c3t1 = Task({'topic' : 'addsub_simp',
-         'title'    : 'template: + - within 10',
+         'title'    : 'Template: + - within 10',
          'descript' : 'settings: range of result, input at 3 positions, swap around =',
          'icon'     : None,   # for quick reference of the exercise      
          'calclines': 1,      # no. of lines for calc to be input.
@@ -156,11 +107,11 @@ class ExStore:
                               # actual positions chosen by Generate.
          '_=_+_'    : False,  # = is _left_ from operator, e.g. 3=1+2
          '=input'   : [1,3,5],# analogous to '_+_=_'
-         'shuffle'  : True,   # shuffle _all_ the calcs
+         'shuffle'  : False,  # shuffle _all_ the calcs
          'cut-max'  : True    # cut set of all calcs down to MAX
         }, [])
         _c3t2 = Task({'topic'   : 'passten',
-         'title'        : 'template: passing the 10 barrier with + -',
+         'title'        : 'Template: + - passing the 10 barrier',
          'descript'     : 'settings: range of 1st operand, input left and right from =, input intermediate result, separate shuffling of operands.',
          'icon'         : None, # for quick reference of the exercise      
          'calclines'    : 1,    # or 2 iff 'newline' : True.
@@ -180,7 +131,7 @@ class ExStore:
          'cut-max'      : True  # cut set of all calcs down to MAX
         }, [])
         _c3t3 = Task({'topic'    : 'times_div', #for programmers only
-         'title'        : 'template: * ; in',
+         'title'        : 'Template: * : "in" series',
          'descript'     : 'settings: series (2,4,8 is possible!) of *, "in" and : with remainder, series 11..19 (left bar),series 10..90 (right long bar), separate shuffling or operands.',
          'icon'         : None,  # for quick reference of the exercise      
          'calclines'    : 1,     # no. of lines for calc to be input.
@@ -194,10 +145,6 @@ class ExStore:
          'remainder'    : False, # : | in ... with remainder
          'vadd'         : 0,     # 0 or 10, for 1.11 ... 1.19
          'vmult'        : 1,     # 1 or 10, for 1.10 ... 1.90
-         'min'          : 2,     # +: minimum number in right *operand
-                                 # -: minimum result
-         'max'          : 2,     # +: maximum number in right *operand
-                                 # -: maximum result
 	 'factors'	: [2,4], # Liste mit ausgewählten zahlen zur berechnung
          'shuffle_all'  : False, # shuffle all calcs  
          'shuffle_inner': False, # shuffle only 1st (inner) iteration
@@ -206,16 +153,41 @@ class ExStore:
 
         self._root = \
 Collection("root = invisible node","required by tree structure", None, 
-  [Collection("Praxis Volksschule", #_c1
-              "Rechenuebungen fuer die 1. und 2.Klasse, festgelegt 16.Dez.09", 
+  [Collection("Praxis Volksschule",                              #_c1
+              "Rechenuebungen fuer die 1. und 2.Klasse, festgelegt am 16.Dez.09 mit Nina Jaklitsch und Arndt Stoeckl .", 
               None, 
-     []),
+     [Collection("Uebungen . und 'in' ",                         #_c1c1
+                 " ", None, 
+        [Collection("Einzelne Reihen . und 'in'",                #_c1c1c1 
+                    " ", None, 
+           [_c1c1c1t2, _c1c1c1t3, _c1c1c1t4, _c1c1c1t5, 
+            _c1c1c1t6, _c1c1c1t7, _c1c1c1t8, _c1c1c1t9
+           ]),
+         Collection("Mehrere Reihen .", 
+                    "Wir ueben zusammengehoerende Reihen.", None, 
+           [
+           ]),
+         Collection("Alle Reihen gemischt", 
+                    " ", None, 
+           [
+           ])
+        ]),                             
+      Collection("Uebungen :",                                   #_c1c2
+                 " ", None, 
+        [
+        ]),
+      Collection("Uebungen + und - ",                            #_c1c3
+                 " ", None, 
+        [
+        ])
+     ]),
    Collection("Schoenberger",       #_c2
               "Most efficient introduction to the four basic arithmetic \
                operations as taught by Igo Schoenberger in the last century \
                in Upper Austria.", 
               None, 
-     []),
+     [
+     ]),
    Collection("Templates",          #_c3
               "These are the (classes of) exercises all others are derived \
                from. Thus, please, do not deletem them. \