Source code for

# pylint: disable=C0116,C0103,E0401,W0631
"""Miscellaneous useful functions.

In particular, methods for converting to and from plate coordinates.

import numpy as np

[docs]def round_at(value, rounding=None): """Round value at the nearest rounding. :param value: the value to round """ if rounding is None: return value return np.round(value / rounding) * rounding
[docs]def replace_nans_in_dict(dictionary, replace_by="null"): """Replace NaNs in a dictionary with a string. :param dictionary: the dictionary :type dictionary: dict :param replace_by: replacement :type replace_by: str """ for key, value in dictionary.items(): if isinstance(value, dict): replace_nans_in_dict(value, replace_by=replace_by) elif value is np.nan: dictionary[key] = replace_by
[docs]def human_seq_size(n): "Return the given sequence as a human friendly 35b, 1.4k, 15k, etc." if n < 1000: return "%db" % n if n < 10000: return "%.1fk" % (n / 1000) return "%dk" % np.round(n / 1000)
unit_factors = { prefix + unit: factor for unit in "glL" for prefix, factor in [("", 1), ("m", 1e-3), ("u", 1e-6), ("n", 1e-9)] } volume_values_and_units = sorted( [(value, unit) for (unit, value) in unit_factors.items() if unit.endswith("L")] )
[docs]def find_best_volume_unit(vols): """Find the best volume unit for a list of volumes.""" med = np.median(vols) for value, unit in volume_values_and_units: if (not unit.endswith("g")) and (med <= 999 * value): return unit return unit
[docs]def human_volume(vol, unit="auto"): """Return a human-readable volume.""" if unit == "auto": unit = find_best_volume_unit([vol]) vol = np.round(vol / unit_factors[unit], 2) if int(vol) == vol: return "%d %s" % (vol, unit) return "%s %s" % (("%.02f" % vol).rstrip("0"), unit)