Created fernuni-bot that can add or remove a members roles.

.gitignore

+# Django #
+*.log
+*.pot
+*.pyc
+__pycache__
+db.sqlite3
+media
+
+# Backup files # 
+*.bak 
+
+# If you are using PyCharm # 
+.idea/**/workspace.xml 
+.idea/**/tasks.xml 
+.idea/dictionaries 
+.idea/**/dataSources/ 
+.idea/**/dataSources.ids 
+.idea/**/dataSources.xml 
+.idea/**/dataSources.local.xml 
+.idea/**/sqlDataSources.xml 
+.idea/**/dynamic.xml 
+.idea/**/uiDesigner.xml 
+.idea/**/gradle.xml 
+.idea/**/libraries 
+*.iws /out/ 
+
+# Python # 
+*.py[cod] 
+*$py.class 
+
+# Distribution / packaging 
+.Python build/ 
+develop-eggs/ 
+dist/ 
+downloads/ 
+eggs/ 
+.eggs/ 
+lib/ 
+lib64/ 
+parts/ 
+sdist/ 
+var/ 
+wheels/ 
+*.egg-info/ 
+.installed.cfg 
+*.egg 
+*.manifest 
+*.spec 
+
+# Installer logs 
+pip-log.txt 
+pip-delete-this-directory.txt 
+
+# Unit test / coverage reports 
+htmlcov/ 
+.tox/ 
+.coverage 
+.coverage.* 
+.cache 
+.pytest_cache/ 
+nosetests.xml 
+coverage.xml 
+*.cover 
+.hypothesis/ 
+
+# Jupyter Notebook 
+.ipynb_checkpoints 
+
+# pyenv 
+.python-version 
+
+# celery 
+celerybeat-schedule.* 
+
+# SageMath parsed files 
+*.sage.py 
+
+# Environments 
+.env 
+.venv 
+env/ 
+venv/ 
+ENV/ 
+env.bak/ 
+venv.bak/ 
+
+# mkdocs documentation 
+/site 
+
+# mypy 
+.mypy_cache/ 
+
+# Sublime Text # 
+*.tmlanguage.cache 
+*.tmPreferences.cache 
+*.stTheme.cache 
+*.sublime-workspace 
+*.sublime-project 
+
+# sftp configuration file 
+sftp-config.json 
+
+# Package control specific files Package 
+Control.last-run 
+Control.ca-list 
+Control.ca-bundle 
+Control.system-ca-bundle 
+GitHub.sublime-settings 
+
+# Visual Studio Code # 
+.vscode/* 
+!.vscode/settings.json 
+!.vscode/tasks.json 
+!.vscode/launch.json 
+!.vscode/extensions.json 
+.history

.idea/.gitignore

+# Default ignored files
+/workspace.xml

.idea/fernuni-bot.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="PYTHON_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/venv" />
+    </content>
+    <orderEntry type="jdk" jdkName="Python 3.8 (fernuni-bot)" jdkType="Python SDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file

.idea/inspectionProfiles/profiles_settings.xml

+<component name="InspectionProjectProfileManager">
+  <settings>
+    <option name="USE_PROJECT_PROFILE" value="false" />
+    <version value="1.0" />
+  </settings>
+</component>
\ No newline at end of file

.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="JavaScriptSettings">
+    <option name="languageLevel" value="ES6" />
+  </component>
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.8 (fernuni-bot)" project-jdk-type="Python SDK" />
+</project>
\ No newline at end of file

.idea/modules.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/fernuni-bot.iml" filepath="$PROJECT_DIR$/.idea/fernuni-bot.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

fernuni-bot.py

+import os
+
+import discord
+from dotenv import load_dotenv
+
+# .env file is necessary in the same directory, that contains Token and guild.
+load_dotenv()
+TOKEN = os.getenv('DISCORD_TOKEN')
+GUILD = int(os.getenv('DISCORD_GUILD'))
+client = discord.Client()
+
+
+# Returns an guild object, that matches the id specified in GUILD.
+# This guild is the FU Hagen Informatik/Mathematik guild.
+def get_guild():
+    for guild in client.guilds:
+        if guild.id == GUILD:
+            return guild
+
+    return None
+
+
+# Get the key for a given role. This role is used for adding or removing a role from a user.
+def get_key(role):
+    if role.name == "B.Sc. Informatik":
+        return "BI"
+    elif role.name == "B.Sc. Mathematik":
+        return "BM"
+    elif role.name == "B.Sc. Wirtschaftsinformatik":
+        return "BWI"
+    elif role.name == "M.Sc. Informatik":
+        return "MI"
+    elif role.name == "M.Sc. Praktische Informatik":
+        return "MPI"
+    elif role.name == "M.Sc. Mathematik":
+        return "MM"
+    elif role.name == "M.Sc. Wirtschaftsinformatik":
+        return "MWI"
+
+
+# Get all roles that are available at the guild.
+def get_guild_roles():
+    guild = get_guild()
+    if guild is not None:
+        roles = {}
+        for role in guild.roles:
+            role_key = get_key(role)
+            if role_key is not None:
+                roles[role_key] = role
+
+        return roles
+
+    return None
+
+
+# Get all roles assigned to a member.
+def get_members_roles(user):
+    guild = get_guild()
+    if type(user) is discord.User and guild is not None:
+        return guild.get_member(user.id).roles
+
+    return None
+
+
+# Send DM to a user/member
+async def send_dm(user, message):
+    if type(user) is discord.User or type(user) is discord.Member:
+        if user.dm_channel is None:
+            await user.create_dm()
+
+        await user.dm_channel.send(message)
+
+
+# Send help message as DM
+async def fu_help(message):
+    answer = f'Ich bin der Fernuni-Bot. Ich kann Rollen zuweisen/entfernen. \n\n'
+    answer += f'Folgende Kommandos stehen zur verfügung:\n'
+    answer += f'`=fu-help` - Zeigt diesen Hilfetext an\n'
+    answer += f'`=fu-all-roles` - Zeigt alle verfügbaren Rollen an, die ich dir zuweisen/entfernen kann.\n'
+    answer += f'`=fu-my-roles` - Zeigt alle Rollen an, die dir momentan zugewiesen sind.\n'
+    answer += f'`=fu-add-roles` - Mit diesem Kommando, gefolgt von einer Liste von Rollen, weise ich dir diese Rollen zu.\n'
+    answer += f'`=fu-remove roles` - Mit diesem Kommendo, gefolgt von einer Liste von Rollen, entferne ich dir diese Rollen.\n\n'
+    answer += f'Hinweise für die Nutzung der Kommandos zum Zuweisen/Entfernen von Rollen:\n'
+    answer += f'In der Liste der verfügbaren Rollen siehst du in eckigen Klammern  einen Schlüssel für die jeweilige Rolle, die für diese Kommandos zu verwenden ist. \n'
+    answer += f'Beispiel: \n[BI] B.Sc. Informatik \n[MM] M.Sc. Mathematik \n'
+    answer += f'`=fu-add-roles BI` fügt die Rolle B.Sc. Informatik hinzu. \n'
+    answer += f'`=fu-remove-roles BI MM` entfernt die Rollen B.Sc. Informatik und M.Sc Mathematik. \n'
+
+    await send_dm(message.author, answer)
+
+
+# Send all available roles that can be assigned to a member by this bot as DM
+async def fu_all_roles(message):
+    roles = get_guild_roles()
+    answer = "Verfügbare Rollen: \n"
+    for key, role in roles.items():
+        answer += f'[{key}] {role.name}\n'
+
+    await send_dm(message.author, answer)
+
+
+# Send the roles assigned to a member as DM.
+async def fu_my_roles(message):
+    my_roles = get_members_roles(message.author)
+    answer = "Dir zugewiesene Rollen:\n"
+
+    if my_roles is not None:
+        for role in my_roles:
+            key = get_key(role)
+            if key is not None:
+                answer += f'[{key}] {role.name} \n'
+
+    await send_dm(message.author, answer)
+
+
+# Add or remove roles assigned to a member. Multiple roles can be added with one command, or removed.
+async def fu_modify_roles(message, add):
+    msg = message.content
+    splitted_msg = msg.split(" ")
+    guild = get_guild()
+
+    if guild is not None:
+        member = guild.get_member(message.author.id)
+
+        if len(splitted_msg) > 1:
+            roles = get_guild_roles()
+            for key in splitted_msg[1:]:
+                if key in roles:
+                    role = roles[key]
+                    if add:
+                        try:
+                            await member.add_roles(role)
+                            await send_dm(message.author, f'Dir wurde die Rolle {role.name} hinzugefügt')
+                        except Exception:
+                            await send_dm(message.author, f'Fehler bei der Zuweisung der Rolle {role.name}')
+                    else:
+                        try:
+                            await member.remove_roles(role)
+                            await send_dm(message.author, f'Dir wurde die Rolle {role.name} entfernt')
+                        except Exception:
+                            await send_dm(message.author, f'Fehler bei der Entfernung der Rolle {role.name}')
+
+
+@client.event
+async def on_ready():
+    print("Client started!")
+
+
+@client.event
+async def on_message(message):
+    msg = message.content
+
+    if message.author == client.user:
+        return
+
+    if msg.startswith("=fu-help"):
+        await fu_help(message)
+    elif msg.startswith("=fu-all-roles"):
+        await fu_all_roles(message)
+    elif msg.startswith("=fu-my-roles"):
+        await fu_my_roles(message)
+    elif msg.startswith("=fu-add-roles"):
+        await fu_modify_roles(message, add=True)
+    elif msg.startswith("=fu-remove-roles"):
+        await fu_modify_roles(message, add=False)
+
+
+client.run(TOKEN)

requirements.txt

+aiohttp==3.6.2
+async-timeout==3.0.1
+attrs==19.3.0
+chardet==3.0.4
+discord==1.0.1
+discord.py==1.3.3
+idna==2.9
+multidict==4.7.5
+python-dotenv==0.12.0
+websockets==8.1
+yarl==1.4.2