How come I can add the boolean value False but not True in a set in Python? [duplicate]

Answer 1

False and True are equal to 0 and 1, respectively. They are distinct entities, yet the two equal values cannot both be in a set. This is clearly undesired behavior, yet it is not clear it can be fixed and still allow multiplying by a boolean value to work as documented.

IPython 6.2.1 -- An enhanced Interactive Python.

1 is True
Out[1]: False

{1,True}
Out[2]: {1}

{0,False}
Out[3]: {0}

{False, 0}
Out[4]: {False}

{True, 1}
Out[5]: {True}

Notice that depending on the order of putting them into the set, 1 will not be in the set if True is already in it, and True will not be in the set if 1 is already in it.