useful python stuff I lug around

utilipy.py

import itertools


def printable_percent(numerator, denominator, precision=2):
  """Truncated readable percentage"""
  return ('%.' + str(precision) + 'f') % (numerator * 100.0 / denominator)

  
def generate_all_binary_states(keys):
  """
  For testing, generate all True/False combinations for a set of keys.
  Return a list of dictionaries {key: boolean}
  """
  return [
    dict(zip(keys, combo)) for combo in
    itertools.product((False, True), repeat=len(keys))
  ]