Can not connect to ACR122-A9

I have 3 ACR122-A9. The last 3 devices here:

-------------------------
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 004: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter
Bus 001 Device 005: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 001 Device 006: ID 072f:2200 Advanced Card Systems, Ltd
Bus 001 Device 007: ID 072f:2200 Advanced Card Systems, Ltd
Bus 001 Device 008: ID 072f:2200 Advanced Card Systems, Ltd
-------------------------

I've tried multiple ways to access but I always get:
>>> clf = nfc.ContactlessFrontend('usb:001:006')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "nfc/clf.py", line 106, in __init__
    raise IOError(errno.ENODEV, os.strerror(errno.ENODEV))
IOError: [Errno 19] No such device

I've used sudo python and I've done:

echo "blacklist pn533" | sudo tee -a /etc/modprobe.d/blacklist-nfc.conf

which I don't really understand what it does.

I even tried updating the ACR122 drivers as one other users suggested but with no luck.

If I try libnfc it seems to be working:

$ nfc-list
nfc-list uses libnfc libnfc-1.7.1
NFC device: ACS / ACR122U PICC Interface opened
2 ISO14443A passive target(s) found:
...
...
NFC device: ACS / ACR122U PICC Interface opened
NFC device: ACS / ACR122U PICC Interface opened

But I'd prefer to code in Python than in C :)

Am I missing something?