def gnc_numeric_to_python_decimal(numeric):
negative = numeric.negative_p()
sign = 1 if negative else 0
val = GncNumeric(numeric.num(), numeric.denom())
result = val.to_decimal(None)
if not result:
raise Exception("gnc numeric value {} CAN'T be converted to decimal!".format(val.to_string()))
digit_tuple = tuple(int(char) for char in str(val.num()) if char != '-')
denominator = val.denom()
exponent = int(log10(denominator))
assert( (10 ** exponent) == denominator )
return Decimal((sign, digit_tuple, -exponent))
def gnc_numeric_to_python_Decimal(numeric):
negative = numeric.negative_p()
if negative:
sign = 1
else:
sign = 0
copy = GncNumeric(numeric.num(), numeric.denom())
result = copy.to_decimal(None)
if not result:
raise Exception("gnc numeric value %s can't be converted to decimal" %
copy.to_string())
digit_tuple = tuple(int(char) for char in str(copy.num()) if char != '-')
denominator = copy.denom()
exponent = int(log10(denominator))
assert ((10**exponent) == denominator)
return Decimal((sign, digit_tuple, -exponent))
def gnc_numeric_to_python_Decimal(numeric):
negative = numeric.negative_p()
if negative:
sign = 1
else:
sign = 0
copy = GncNumeric(numeric.num(), numeric.denom())
result = copy.to_decimal(None)
if not result:
raise Exception("gnc numeric value %s can't be converted to deciaml" %
copy.to_string() )
digit_tuple = tuple( int(char)
for char in str(copy.num())
if char != '-' )
denominator = copy.denom()
exponent = int(log10(denominator))
assert( (10 ** exponent) == denominator )
return Decimal( (sign, digit_tuple, -exponent) )
def to_string_with_decimal_point_placed(number: GncNumeric):
"""Convert a GncNumeric to a string with decimal point placed if permissible.
Otherwise returns its fractional representation.
"""
number = copy.copy(number)
if not number.to_decimal(None):
return str(number)
nominator = str(number.num())
point_place = str(number.denom()).count('0') # How many zeros in the denominator?
if point_place == 0:
return nominator
if len(nominator) <= point_place: # prepending zeros if the nominator is too short
nominator = '0' * (point_place - len(nominator)) + nominator
return '.'.join([nominator[:-point_place - 1], nominator[-point_place:]])