Initial preparation for xlsx output

export.py

 import csv
+import openpyxl
 import collections
 import os.path
 
@@ -6,16 +7,12 @@ def process(reader):
     event_data = collections.defaultdict(list)
 
     for line in reader:
-        date, time = line['Start Date & Time'].split(' ')
-        if time == '12:15':
-            timename = 'Mittag'
-        elif time == '17:30':
-            timename = 'Abend'
-        else:
-            raise ValueError(time)
-        filename = f'{date}_{timename}.csv'
-
-        exams = line['Response 1'].split('\n') + line['Response 2'].split('\n')
+        date, slot = line['Start Date & Time'].split(' ')
+        # FIXME
+        slot = f'{date} {slot}'
+        # assert date == ...
+
+        exams = line['Response 1'].split('\n') + line['Response 2'].split('\n')  # fixme 3 and 4
         exams = [e for e in exams if e]
 
         lastname = line['Invitee Last Name']
@@ -23,29 +20,41 @@ def process(reader):
         email = line['Invitee Email']
 
         if line['Canceled'] == 'true':
-            print(f"Cancelled: {lastname} {firstname} for {date} {timename}")
+            print(f"Cancelled: {lastname} {firstname} for {slot}")
             continue
 
         if not firstname or not lastname:
-            print(f"!!! WRONG NAME: {lastname} {firstname} {email} for {date} {timename} {exams}")
+            print(f"!!! WRONG NAME: {lastname} {firstname} {email} for {slot} {exams}")
         if not exams:
-            print(f"!!! NO EXAMS: {lastname} {firstname} {email} for {date} {timename}")
+            print(f"!!! NO EXAMS: {lastname} {firstname} {email} for {slot}")
         
-        event_data[filename].append((lastname, firstname, ' '.join(exams), email))
+        event_data[slot].append((lastname, firstname, ' '.join(exams), email))
 
     return event_data
 
-def writeout(filename, data):
-    with open(filename, 'w', newline='', encoding='latin1') as f:
-        writer = csv.writer(f, delimiter=';')
-        date, timename = os.path.splitext(filename)[0].split('_')
-        writer.writerow([date, timename, '', ''])
+def _resize_cols(sheet):
+    dimensions = {
+        'A': 20,
+        'B': 20,
+        'C': 50,
+        'D': 30,
+    }
+    for col, dim in dimensions.items():
+        sheet.column_dimensions[col].width = dim
+
+def writeout(event_data):
+    workbook = openpyxl.Workbook()
+
+    for slot, data in event_data.items():
+        sheet = workbook.create_sheet(title=slot.replace(':', '.'))
         for row in data:
-            writer.writerow(list(row))
+            sheet.append(list(row))
+        _resize_cols(sheet)
 
+    del workbook['Sheet']
+    workbook.save('einsicht.xlsx')
 
 with open('events-export.csv') as f:
     reader = csv.DictReader(f)
-    all_data = process(reader)
-    for filename, data in all_data.items():
-        writeout(filename, data)
+    event_data = process(reader)
+    writeout(event_data)