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Counts

class Counts(data, time_taken=None, creg_sizes=None, memory_slots=None)[código fonte]

Bases: dict

A class to store a counts result from a circuit execution.

Build a counts object

Parâmetros
  • data (dict) –

    The dictionary input for the counts. Where the keys represent a measured classical value and the value is an integer the number of shots with that result. The keys can be one of several formats:

    • A hexadecimal string of the form '0x4a'

    • A bit string prefixed with 0b for example '0b1011'

    • A bit string formatted across register and memory slots. For example, '00 10'.

    • A dit string, for example '02'. Note for objects created with dit strings the creg_sizes and memory_slots kwargs don’t work and hex_outcomes() and int_outcomes() also do not work.

  • time_taken (float) – The duration of the experiment that generated the counts in seconds.

  • creg_sizes (list) – a nested list where the inner element is a list of tuples containing both the classical register name and classical register size. For example, [('c_reg', 2), ('my_creg', 4)].

  • memory_slots (int) – The number of total memory_slots in the experiment.

Levanta
  • TypeError – If the input key type is not an int or str.

  • QiskitError – If a dit string key is input with creg_sizes and/or memory_slots.

Methods

clear

copy

fromkeys

Create a new dictionary with keys from iterable and values set to value.

get

Return the value for key if key is in the dictionary, else default.

hex_outcomes

Return a counts dictionary with hexadecimal string keys

int_outcomes

Build a counts dictionary with integer keys instead of count strings

items

keys

most_frequent

Return the most frequent count

pop

If key is not found, d is returned if given, otherwise KeyError is raised

popitem

Remove and return a (key, value) pair as a 2-tuple.

setdefault

Insert key with a value of default if key is not in the dictionary.

shots

Return the number of shots

update

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]

values

Attributes

bitstring_regex = re.compile('^[01\\s]+$')