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Approve functions used as default arguments (#4699)

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* Approve functions used as default argumenets

* The default value for **seed** is the result of a function call

The default value for **seed** is the result of a function call which is not normally recommended and causes flake8-bugbear to raise a B008 error. However, in this case, it is accptable because `LinearCongruentialGenerator.__init__()` will only be called once per instance and it ensures that each instance will generate a unique sequence of numbers.

* The default value for **backend** is the result of a function call

The default value for **backend** is the result of a function call which is not normally recommended and causes flake8-bugbear to raise a B008 error. However, in this case, it is accptable because `Aer.get_backend()` is called when the function is definition and that same backend is then reused for function calls.

* Update linear_congruential_generator.py

* Update ripple_adder_classic.py

* Update ripple_adder_classic.py

* Update ripple_adder_classic.py

* Update ripple_adder_classic.py

* Update ripple_adder_classic.py
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Christian Clauss 2021-08-31 07:56:19 +02:00 committed by GitHub
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commit ef9827166e
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2 changed files with 18 additions and 4 deletions
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8
other/linear_congruential_generator.py
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@ -8,7 +8,13 @@ class LinearCongruentialGenerator:
A pseudorandom number generator. A pseudorandom number generator.
""" """
def __init__(self, multiplier, increment, modulo, seed=int(time())): # The default value for **seed** is the result of a function call which is not
# normally recommended and causes flake8-bugbear to raise a B008 error. However,
# in this case, it is accptable because `LinearCongruentialGenerator.__init__()`
# will only be called once per instance and it ensures that each instance will
# generate a unique sequence of numbers.
def __init__(self, multiplier, increment, modulo, seed=int(time())): # noqa: B008
""" """
These parameters are saved and used when nextNumber() is called. These parameters are saved and used when nextNumber() is called.

14
quantum/ripple_adder_classic.py
View File

@ -53,8 +53,16 @@ def full_adder(
circuit.cx(input1_loc, input2_loc) circuit.cx(input1_loc, input2_loc)
# The default value for **backend** is the result of a function call which is not
# normally recommended and causes flake8-bugbear to raise a B008 error. However,
# in this case, this is accptable because `Aer.get_backend()` is called when the
# function is defined and that same backend is then reused for all function calls.
def ripple_adder( def ripple_adder(
val1: int, val2: int, backend: BaseBackend = Aer.get_backend("qasm_simulator") val1: int,
val2: int,
backend: BaseBackend = Aer.get_backend("qasm_simulator"), # noqa: B008
) -> int: ) -> int:
""" """
Quantum Equivalent of a Ripple Adder Circuit Quantum Equivalent of a Ripple Adder Circuit
@ -63,7 +71,7 @@ def ripple_adder(
Currently only adds 'emulated' Classical Bits Currently only adds 'emulated' Classical Bits
but nothing prevents us from doing this with hadamard'd bits :) but nothing prevents us from doing this with hadamard'd bits :)
Only supports adding +ve Integers Only supports adding positive integers
>>> ripple_adder(3, 4) >>> ripple_adder(3, 4)
7 7
@ -99,7 +107,7 @@ def ripple_adder(
res = execute(circuit, backend, shots=1).result() res = execute(circuit, backend, shots=1).result()
# The result is in binary. Convert it back to int # The result is in binary. Convert it back to int
return int(list(res.get_counts().keys())[0], 2) return int(list(res.get_counts())[0], 2)
if __name__ == "__main__": if __name__ == "__main__":