def represent_datetime(self, data):
# type: (Any) -> Any
inter = 'T' if data._yaml['t'] else ' '
_yaml = data._yaml
if _yaml['delta']:
data += _yaml['delta']
value = data.isoformat(inter)
else:
value = data.isoformat(inter)
if _yaml['tz']:
value += _yaml['tz']
return self.represent_scalar(u'tag:yaml.org,2002:timestamp', to_unicode(value))
def represent_float(self, data):
# type: (Any) -> Any
if data != data or (data == 0.0 and data == 1.0):
value = u'.nan'
elif data == self.inf_value:
value = u'.inf'
elif data == -self.inf_value:
value = u'-.inf'
else:
value = to_unicode(repr(data)).lower()
if getattr(self.serializer, 'use_version', None) == (1, 1):
if u'.' not in value and u'e' in value:
# Note that in some cases `repr(data)` represents a float number
# without the decimal parts. For instance:
# >>> repr(1e17)
# '1e17'
# Unfortunately, this is not a valid float representation according
# to the definition of the `!!float` tag in YAML 1.1. We fix
# this by adding '.0' before the 'e' symbol.
value = value.replace(u'e', u'.0e', 1)
return self.represent_scalar(u'tag:yaml.org,2002:float', value)
def represent_scalar_float(self, data):
# type: (Any) -> Any
""" this is way more complicated """
value = None
if data != data or (data == 0.0 and data == 1.0):
value = u'.nan'
elif data == self.inf_value:
value = u'.inf'
elif data == -self.inf_value:
value = u'-.inf'
if value:
return self.represent_scalar(u'tag:yaml.org,2002:float', value)
if data._exp is None and data._prec > 0 and data._prec == data._width - 1:
# no exponent, but trailing dot
value = u'{}{:d}.'.format(data._m_sign if data._m_sign else "", abs(int(data)))
elif data._exp is None:
# no exponent, "normal" dot
prec = data._prec
ms = data._m_sign if data._m_sign else ""
# -1 for the dot
value = u'{}{:0{}.{}f}'.format(
ms, abs(data), data._width - len(ms), data._width - prec - 1
)
if prec == 0 or (prec == 1 and ms != ""):
value = value.replace(u'0.', u'.')
while len(value) < data._width:
value += u'0'
else:
# exponent
m, es = u'{:{}.{}e}'.format(
data, data._width, data._width - data._prec + (1 if data._m_sign else 0)
).split('e')
w = data._width if data._prec > 0 else (data._width + 1)
if data < 0:
w += 1
m = m[:w]
e = int(es)
m1, m2 = m.split('.') # always second?
while len(m1) + len(m2) < data._width - (1 if data._prec >= 0 else 0):
m2 += u'0'
if data._m_sign and data > 0:
m1 = '+' + m1
esgn = u'+' if data._e_sign else ""
if data._prec < 0: # mantissa without dot
if m2 != u'0':
e -= len(m2)
else:
m2 = ""
while (len(m1) + len(m2) - (1 if data._m_sign else 0)) < data._width:
m2 += u'0'
e -= 1
value = m1 + m2 + data._exp + u'{:{}0{}d}'.format(e, esgn, data._e_width)
elif data._prec == 0: # mantissa with trailing dot
e -= len(m2)
value = (
m1 + m2 + u'.' + data._exp + u'{:{}0{}d}'.format(e, esgn, data._e_width)
)
else:
if data._m_lead0 > 0:
m2 = u'0' * (data._m_lead0 - 1) + m1 + m2
m1 = u'0'
m2 = m2[: -data._m_lead0] # these should be zeros
e += data._m_lead0
while len(m1) < data._prec:
m1 += m2[0]
m2 = m2[1:]
e -= 1
value = (
m1 + u'.' + m2 + data._exp + u'{:{}0{}d}'.format(e, esgn, data._e_width)
)
if value is None:
value = to_unicode(repr(data)).lower()
return self.represent_scalar(u'tag:yaml.org,2002:float', value)
def represent_long(self, data):
# type: (Any) -> Any
tag = u'tag:yaml.org,2002:int'
if int(data) is not data:
tag = u'tag:yaml.org,2002:python/long'
return self.represent_scalar(tag, to_unicode(data))
def represent_datetime(self, data):
# type: (Any) -> Any
value = to_unicode(data.isoformat(' '))
return self.represent_scalar(u'tag:yaml.org,2002:timestamp', value)