If you have realized that the obfuscated scripts are black box for end users, you can do more in your own Python scripts.In these cases, :mod:`pytransform` would be useful.
The :mod:`pytransform` module is distributed with obfuscated scripts, and must be imported before running any obfuscated scripts. It also can be used in your python scripts.
.. exception:: PytransformError This is raised when any pytransform api failed. The argument to the exception is a string indicating the cause of the error.
.. function:: get_expired_days() Return how many days left for time limitation license. >0: valid in these days -1: never expired
Note
If the obfuscated script has been expired, it will raise exception and quit directly. All the code in the obfuscated script will not run, so this function will never return 0.
.. function:: get_license_info() Get license information of obfuscated scripts. It returns a dict with keys: * expired: Expired date * IFMAC: mac address bind to this license * HARDDISK: serial number of harddisk bind to this license * IPV4: ipv4 address bind to this license * DATA: any data stored in this licese, used by extending license type * CODE: registration code of this license The value `None` means no this key in the license. Raise :exc:`Exception` if license is invalid, for example, it has been expired.
.. function:: get_license_code() Return a string, which is specified as generating the licenses for obfucated scripts. Raise :exc:`Exception` if license is invalid.
.. function:: get_hd_info(hdtype, size=256) Get hardware information by *hdtype*, *hdtype* could one of *HT_HARDDISK* return the serial number of first harddisk *HT_IFMAC* return mac address of first network card Raise :exc:`Exception` if something is wrong.
.. attribute:: HT_HARDDISK, HT_IFMAC Constant for `hdtype` when calling :func:`get_hd_info`
Copy those example code to any script, for example foo.py, obfuscate it, then run the obfuscated script.
Show left days of license
from pytransform import PytransformError, get_license_info, get_expired_days
try:
code = get_license_info()['CODE']
left_days = get_expired_days()
if left_days == -1:
print('This license for %s is never expired' % code)
else:
print('This license for %s will be expired in %d days' % (code, left_days))
except Exception as e:
print(e)More usage refer to :ref:`Using Plugin to Extend License Type`
Note
Though pytransform.py is not obfuscated when running the obfuscated script, it's also protected by PyArmor. If it's changed, the obfuscated script will raise protection exception.