# Repository: https://gitlab.com/quantify-os/quantify-scheduler
# Licensed according to the LICENCE file on the main branch
"""Helpers for various collections."""
from __future__ import annotations
from collections import UserDict
from typing import Any, Iterable, List, Tuple
import numpy as np
import xxhash
[docs]
def make_hash(obj: Any) -> int:
"""
Make a hash from a dictionary, list, tuple or set to any level.
From: https://stackoverflow.com/questions/5884066/hashing-a-dictionary
Parameters
----------
obj
Input collection.
Returns
-------
:
Hash.
"""
new_hash = xxhash.xxh64()
if isinstance(obj, (set, tuple, list)):
return hash(tuple(make_hash(e) for e in obj))
if isinstance(obj, np.ndarray):
# numpy arrays behave funny for hashing
new_hash.update(obj)
val = new_hash.intdigest()
new_hash.reset()
return val
if not isinstance(obj, dict):
return hash(obj)
tuple_of_hashes = ((key, make_hash(val)) for key, val in obj.items())
return hash(frozenset(sorted(tuple_of_hashes)))
[docs]
def without(dict_in: dict, keys: list) -> dict:
"""
Copy a dictionary excluding a specific list of keys.
Parameters
----------
dict_in
Input dictionary.
keys
List of keys to exclude.
Returns
-------
:
Filtered dictionary.
"""
if not isinstance(keys, list):
keys = [keys]
new_d = dict_in.copy()
for key in keys:
new_d.pop(key)
return new_d
[docs]
def find_inner_dicts_containing_key(d: dict, key: Any) -> List[dict]:
"""
Generate a list of the first dictionaries encountered that contain a certain key.
This is achieved by recursively traversing the nested structures until the key is
found, which is then appended to a list.
Parameters
----------
d
The dictionary to traverse.
key
The key to search for.
Returns
-------
:
A list containing all the inner dictionaries containing the specified key.
"""
dicts_found = []
if isinstance(d, dict):
if key in d:
dicts_found.append(d)
for val in d.values():
if isinstance(val, (dict, UserDict)):
dicts_found.extend(find_inner_dicts_containing_key(val, key))
elif isinstance(val, Iterable) and not isinstance(val, str):
for i_item in val:
try:
dicts_found.extend(find_inner_dicts_containing_key(i_item, key))
# having a list that contains something other than a dict can cause an
# AttributeError on d, but this should be ignored anyway
except AttributeError:
continue
else:
continue
return dicts_found
[docs]
def find_all_port_clock_combinations(d: dict) -> List[Tuple[str, str]]:
"""
Generate a list with all port-clock combinations found in a nested dictionary.
Traversing the dictionary is done using the
``find_inner_dicts_containing_key`` function.
Parameters
----------
d
The dictionary to traverse.
Returns
-------
:
A list containing tuples representing the port and clock combinations found
in the dictionary.
"""
port_clocks = []
dicts_with_port = find_inner_dicts_containing_key(d, "port")
for inner_dict in dicts_with_port:
if "port" in inner_dict:
port = inner_dict["port"]
if port is None:
continue
if "clock" not in inner_dict:
raise AttributeError(f"Port {inner_dict['port']} missing clock")
clock = inner_dict["clock"]
port_clocks.append((port, clock))
return port_clocks
[docs]
def find_port_clock_path(hardware_config: dict, port: str, clock: str) -> list:
"""
Find the path to a port-clock combination in a nested dictionary.
Parameters
----------
hardware_config
The (nested) hardware config dictionary to loop over.
port
The port to find.
clock
The clock to find.
Returns
-------
:
A list representing the keys to the port-clock combination in the hardware config.
If the port-clock location is in a list, the list index is also included in this path.
"""
def recursive_find(hardware_config, port, clock, path) -> list | None:
for k, v in hardware_config.items():
# If key is port, we are done
if k == "port":
if (
hardware_config["port"] == port
and hardware_config["clock"] == clock
):
return path
# If value is list, append key to path and loop trough its elements.
elif isinstance(v, list):
path.append(k) # Add list key to path.
for i, sub_config in enumerate(v):
path.append(i) # Add list element index to path.
if isinstance(sub_config, dict):
found_path = recursive_find(sub_config, port, clock, path)
if found_path:
return found_path
path.pop() # Remove list index if port-clock not found in element.
path.pop() # Remove list key if port-clock not found in list.
# If dict append its key. If port is not found delete it
elif isinstance(v, dict):
path.append(k)
found_path = recursive_find(v, port, clock, path)
if found_path:
return found_path
path.pop() # Remove dict key if port-clock not found in this dict.
return None
port_clock_path = recursive_find(hardware_config, port, clock, path=[])
if port_clock_path is None:
raise KeyError(
f"The combination of {port=} and {clock=} could not be found in {hardware_config=}."
)
else:
return port_clock_path
