v2

.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

clie_file.py

 s = socket.socket()
 host = socket.gethostname()
 port = 12345
-
 s.connect((host, port))
-
 s.send(eingabe.encode('utf-8'))
 
+msgRes = s.recv(1024)
+print(msgRes.decode('utf-8'))
+
 s.close()

serv_file.py

 while True:
     (connection, addr) = s.accept()
 
-    bytes = s.recv(1024)
-    print(bytes.decode('utf-8'))
+    msg = connection.recv(1024)
+    msgReturn = msg.decode('utf-8').upper()
+    connection.send(msgReturn.encode('utf-8'))
+    connection.close()
+
+
+
 
-    connection.close()