Nullable ManyToManyField found PTC-W0905
Having a nullable many-to-many field doesn't do anything. The declaration of a ManyToManyField causes the creation of an intermediate table to hold the relationship. Each relation between the two tables is an entry in this new table. By definition, having no relations between two tables would mean no entries in this table. There's no use of null. Consider removing null=True from this property.
Defining equality for a class without also defining hashability PYL-W1641
In order to conform to the object model, classes that define their own equality method should also define their own hash method, or be unhashable. If the hash method is not defined then the hash of the super class is used. This is unlikely to result in the expected behavior. A class can be made unhashable by setting its __hash__ attribute to None.
raising NotImplemented is not allowed FLK-F901
While returning NotImplemented would be fine, raising it doesn't work and will cause a TypeError because NotImplemented is not an exception type.
Debugger import detected PTC-W0013
Debuggers should only be used temporarily and locally. It is highly recommended to remove debug statements in checked-in code.
Invalid metaclass PYL-E1139
The class is using, as a metaclass, something which might be invalid for using as a metaclass.
Do not use bare except, specify exception instead FLK-E722
Using except without a specific exception can be error prone.
Use of unicode built-in detected PYL-W1612
The built-in function being accessed has been removed from Python 3. Please consult the documentation.
init method converted to generator PYL-E0100
The __init__() method is required to return nothing, but a yield statement in its body was detected. This will raise a TypeError.
Local variable name referenced before assignment FLK-F823
Local variables should be defined before they are referenced.
import module from line N shadowed by loop variable FLK-F402
Loop variables should not redefine the name of modules that are imported.
Unary operand used on an unsupported object PYL-E1130
A unary operand is used on an object which does not support this type of operation. This is an error.
Dictionary key variable name repeated with different values FLK-F602
All dictionary keys should be unique.
Two or more starred expressions in an assignment (a, *b, *c = d) FLK-F622
There are more than one starred expressions (*x) in an assignment. This is a SyntaxError.
Format string truncated PYL-E1301
The format string was terminated before the end of a conversion specifier. It is recommended to look again and verify if the conversion specifier is given.
Invalid slice index found PYL-E1127
A slice is indexed with an invalid type. Valid types are ints, slices, and objects with an __index__ method.
Use of xrange built-in detected PYL-W1613
The built-in function being accessed has been removed from Python 3. Please consult the documentation.
Deletion attempted with unsupported object PYL-E1138
Deletion is supported only for items which implement __delitem__.
Bad first argument given in super() call PYL-E1003
The first argument to the super() function must be the current class.
Admin class not in app's admin.py PTC-W0903
Admin classes not in an app's admin.py can cause circular import problems throughout a project. This is because registering an admin class implies a call to models.get_apps() which attempts to import every models.py in the project.
Use of raw_input built-in detected PYL-W1609
The built-in function being accessed has been removed from Python 3. Please consult the documentation.