将用户给定的输入转换为Key，将值转换为字典python

Question

只是尝试使用python ldap模块来修改LDAP中的值 我给了belwo代码，第一个正在工作，第二个是我试图成为输入库，需要从用户输入中获取值。

#!/usr/bin/python
# import needed modules
import ldap
import ldap.modlist as modlist

secret = raw_input("Please insert the password")
# Open a connection
l = ldap.initialize("ldap://testldap.lab.com:389")

# Bind/authenticate with a user with apropriate rights to add objects
l.simple_bind_s("cn=directory manager", secret)

# The dn of our existing entry/object
dn="cn=testldapgroup1,ou=Group,ou=corp,ou=services,o=lab.com"

# Some place-holders for old and new values
old = {'businessCategory':'Public'}
new = {'businessCategory':'Private'}

# Convert place-holders for modify-operation using modlist-module
ldif = modlist.modifyModlist(old,new)

# Do the actual modification
l.modify_s(dn,ldif)

# Its nice to the server to disconnect and free resources when done
l.unbind_s()

按预期工作：

$ python test.py
Please insert the password: mypass123
$

其次，我想要基于此代码输入，但作为新手，我无法通过old将new和raw_input值排列/创建到字典中，同时将纯字符串值放置为输入

#!/usr/bin/python
# import needed modules
import ldap
import ldap.modlist as modlist

secret = raw_input("Please insert the password: ")
# Open a connection
l = ldap.initialize("ldap://testldap.lab.com:389")

# Bind/authenticate with a user with apropriate rights to add objects
l.simple_bind_s("cn=directory manager", secret)

# The dn of our existing entry/object
dn= raw_input("Please Insert the dn value to be modified: ")

# Some place-holders for old and new values
old = {raw_input("Please Insert Key:value")}
new = {raw_input("Please Insert Key:value")}

# Convert place-holders for modify-operation using modlist-module
ldif = modlist.modifyModlist(old,new)

# Do the actual modification
l.modify_s(dn,ldif)

# Its nice to the server to disconnect and free resources when done
l.unbind_s()