from collections import defaultdict
values = ['python', 'proj', 'proj']
d = defaultdict(list)
for v in values:
d[v].append(v)
print(dict(d))
ZnJvbSBjb2xsZWN0aW9ucyBpbXBvcnQgZGVmYXVsdGRpY3QKCgp2YWx1ZXMgPSBbJ3B5dGhvbicsICdwcm9qJywgJ3Byb2onXQoKZCA9IGRlZmF1bHRkaWN0KGxpc3QpCmZvciB2IGluIHZhbHVlczoKICAgIGRbdl0uYXBwZW5kKHYpCgpwcmludChkaWN0KGQpKQ==