Create task2

task2

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+import re
+from pprint import pprint
+import csv
+
+PHONE_PATTERN = r'(\+7|8)*[\s\(]*(\d{3})[\)\s-]*(\d{3})[-]*(\d{2})[-]*(\d{2})[\s\(]*(доб\.)*[\s]*(\d+)*[\)]*'
+PHONE_SUB = r'+7(\2)-\3-\4-\5 \6\7'
+
+with open("phonebook_raw.csv", encoding="utf-8") as f:
+    rows = csv.reader(f, delimiter=",")
+    contacts_list = list(rows)
+
+def main(contact_list: list):
+    """основная логика"""
+    new_list = list()
+    for item in contact_list:
+        full_name = ' '.join(item[:3]).split(' ')
+        result = [full_name[0], full_name[1], full_name[2], item[3], item[4],
+                  re.sub(PHONE_PATTERN, PHONE_SUB, item[5]),
+                  item[6]]
+        new_list.append(result)
+    return union(new_list)
+
+def union(contacts: list):
+    for contact in contacts:
+        first_name = contact[0]
+        last_name = contact[1]
+        for new_contact in contacts:
+            new_first_name = new_contact[0]
+            new_last_name = new_contact[1]
+            if first_name == new_first_name and last_name == new_last_name:
+                if contact[2] == "": contact[2] = new_contact[2]
+                if contact[3] == "": contact[3] = new_contact[3]
+                if contact[4] == "": contact[4] = new_contact[4]
+                if contact[5] == "": contact[5] = new_contact[5]
+                if contact[6] == "": contact[6] = new_contact[6]
+
+    result_list = list()
+    for i in contacts:
+        if i not in result_list:
+            result_list.append(i)
+
+    return result_list
+
+with open("phonebook.csv", "w", encoding="utf-8") as f:
+    datawriter = csv.writer(f, delimiter=',')
+    datawriter.writerows(main(contacts_list))