Добавлены примеры и задание по типам коллекций

src-collections/generate_usernames.py

@@ -0,0 +1,72 @@
+# -*- coding: utf-8 -*-
+
+import collections
+import sys
+
+# Start 1st block
+ID, FORENAME, MIDDLENAME, SURNAME, DEPARTMENT = range(5)
+# End 1st block
+
+User = collections.namedtuple("User",
+            "username forename middlename surname id")
+# End 2d block
+
+def main():
+    if len(sys.argv) == 1 or sys.argv[1] in {"-h", "--help"}:
+        print("usage: {0} file1 [file2 [... fileN]]".format(
+              sys.argv[0]))
+        sys.exit()
+
+    usernames = set()
+    users = {}
+    for filename in sys.argv[1:]:
+        with open(filename, encoding="utf8") as file:
+            for line in file:
+                line = line.rstrip()
+                if line:
+                    user = process_line(line, usernames)
+                    users[(user.surname.lower(), user.forename.lower(),
+                            user.id)] = user
+    print_users(users)
+
+
+def process_line(line, usernames):
+    fields = line.split(":")
+    username = generate_username(fields, usernames)
+    user = User(username, fields[FORENAME], fields[MIDDLENAME],
+                fields[SURNAME], fields[ID])
+    return user
+
+
+def generate_username(fields, usernames):
+    username = ((fields[FORENAME][0] + fields[MIDDLENAME][:1] +
+                 fields[SURNAME]).replace("-", "").replace("'", ""))
+    username = original_name = username[:8].lower()
+    count = 1
+    while username in usernames:
+        username = "{0}{1}".format(original_name, count)
+        count += 1
+    usernames.add(username)
+    return username
+
+
+def print_users(users):
+    namewidth = 32
+    usernamewidth = 9
+
+    print("{0:<{nw}} {1:^6} {2:{uw}}".format(
+          "Name", "ID", "Username", nw=namewidth, uw=usernamewidth))
+    print("{0:-<{nw}} {0:-<6} {0:-<{uw}}".format(
+          "", nw=namewidth, uw=usernamewidth))
+
+    for key in sorted(users):
+        user = users[key]
+        initial = ""
+        if user.middlename:
+            initial = " " + user.middlename[0]
+        name = "{0.surname}, {0.forename}{1}".format(user, initial)
+        print("{0:.<{nw}} ({1.id:4}) {1.username:{uw}}".format(
+              name, user, nw=namewidth, uw=usernamewidth))
+
+
+main()