- class QuasiDistribution(data, shots=None, stddev_upper_bound=None)¶
A dict-like class for representing quasi-probabilities.
Builds a quasiprobability distribution object.
data (dict) --
Input quasiprobability data. Where the keys represent a measured classical value and the value is a float for the quasiprobability of that result. The keys can be one of several formats:
A hexadecimal string of the form
A bit string e.g.
shots (int) -- Number of shots the distribution was derived from.
stddev_upper_bound (float) -- An upper bound for the standard deviation
TypeError -- If the input keys are not a string or int
ValueError -- If the string format of the keys is incorrect
Build a quasi-probabilities dictionary with binary string keys
Create a new dictionary with keys from iterable and values set to value.
Return the value for key if key is in the dictionary, else default.
Build a quasi-probabilities dictionary with hexadecimal string keys
Takes a quasiprobability distribution and maps it to the closest probability distribution as defined by the L2-norm.
If key is not found, d is returned if given, otherwise KeyError is raised
Remove and return a (key, value) pair as a 2-tuple.
Insert key with a value of default if key is not in the dictionary.
If E is present and has a .keys() method, then does: for k in E: D[k] = E[k] If E is present and lacks a .keys() method, then does: for k, v in E: D[k] = v In either case, this is followed by: for k in F: D[k] = F[k]
Return an upper bound on standard deviation of expval estimator.