def bitname(obj):
"""Return a bit-width name for a given type object"""
name = obj.__name__
base = ''
char = ''
try:
if name[-1] == '_':
newname = name[:-1]
else:
newname = name
info = typeinfo[english_upper(newname)]
assert(info[-1] == obj) # sanity check
bits = info[2]
except KeyError: # bit-width name
base, bits = _evalname(name)
char = base[0]
if name == 'bool_':
char = 'b'
base = 'bool'
elif name == 'void':
char = 'V'
base = 'void'
elif name == 'object_':
char = 'O'
base = 'object'
bits = 0
elif name == 'datetime64':
char = 'M'
elif name == 'timedelta64':
char = 'm'
if sys.version_info[0] >= 3:
if name == 'bytes_':
char = 'S'
base = 'bytes'
elif name == 'str_':
char = 'U'
base = 'str'
else:
if name == 'string_':
char = 'S'
base = 'string'
elif name == 'unicode_':
char = 'U'
base = 'unicode'
bytes = bits // 8
if char != '' and bytes != 0:
char = "%s%d" % (char, bytes)
return base, bits, char
python类bool()的实例源码
def _set_up_aliases():
type_pairs = [('complex_', 'cdouble'),
('int0', 'intp'),
('uint0', 'uintp'),
('single', 'float'),
('csingle', 'cfloat'),
('singlecomplex', 'cfloat'),
('float_', 'double'),
('intc', 'int'),
('uintc', 'uint'),
('int_', 'long'),
('uint', 'ulong'),
('cfloat', 'cdouble'),
('longfloat', 'longdouble'),
('clongfloat', 'clongdouble'),
('longcomplex', 'clongdouble'),
('bool_', 'bool'),
('unicode_', 'unicode'),
('object_', 'object')]
if sys.version_info[0] >= 3:
type_pairs.extend([('bytes_', 'string'),
('str_', 'unicode'),
('string_', 'string')])
else:
type_pairs.extend([('str_', 'string'),
('string_', 'string'),
('bytes_', 'string')])
for alias, t in type_pairs:
allTypes[alias] = allTypes[t]
sctypeDict[alias] = sctypeDict[t]
# Remove aliases overriding python types and modules
to_remove = ['ulong', 'object', 'unicode', 'int', 'long', 'float',
'complex', 'bool', 'string', 'datetime', 'timedelta']
if sys.version_info[0] >= 3:
# Py3K
to_remove.append('bytes')
to_remove.append('str')
to_remove.remove('unicode')
to_remove.remove('long')
for t in to_remove:
try:
del allTypes[t]
del sctypeDict[t]
except KeyError:
pass
def issctype(rep):
"""
Determines whether the given object represents a scalar data-type.
Parameters
----------
rep : any
If `rep` is an instance of a scalar dtype, True is returned. If not,
False is returned.
Returns
-------
out : bool
Boolean result of check whether `rep` is a scalar dtype.
See Also
--------
issubsctype, issubdtype, obj2sctype, sctype2char
Examples
--------
>>> np.issctype(np.int32)
True
>>> np.issctype(list)
False
>>> np.issctype(1.1)
False
Strings are also a scalar type:
>>> np.issctype(np.dtype('str'))
True
"""
if not isinstance(rep, (type, dtype)):
return False
try:
res = obj2sctype(rep)
if res and res != object_:
return True
return False
except:
return False
def update(self, func, default=None, testing_value=None,
missing_values=asbytes(''), locked=False):
"""
Set StringConverter attributes directly.
Parameters
----------
func : function
Conversion function.
default : any, optional
Value to return by default, that is, when the string to be
converted is flagged as missing. If not given,
`StringConverter` tries to supply a reasonable default value.
testing_value : str, optional
A string representing a standard input value of the converter.
This string is used to help defining a reasonable default
value.
missing_values : sequence of str, optional
Sequence of strings indicating a missing value.
locked : bool, optional
Whether the StringConverter should be locked to prevent
automatic upgrade or not. Default is False.
Notes
-----
`update` takes the same parameters as the constructor of
`StringConverter`, except that `func` does not accept a `dtype`
whereas `dtype_or_func` in the constructor does.
"""
self.func = func
self._locked = locked
# Don't reset the default to None if we can avoid it
if default is not None:
self.default = default
self.type = self._dtypeortype(self._getdtype(default))
else:
try:
tester = func(testing_value or asbytes('1'))
except (TypeError, ValueError):
tester = None
self.type = self._dtypeortype(self._getdtype(tester))
# Add the missing values to the existing set
if missing_values is not None:
if _is_bytes_like(missing_values):
self.missing_values.add(missing_values)
elif hasattr(missing_values, '__iter__'):
for val in missing_values:
self.missing_values.add(val)
else:
self.missing_values = []
def bitname(obj):
"""Return a bit-width name for a given type object"""
name = obj.__name__
base = ''
char = ''
try:
if name[-1] == '_':
newname = name[:-1]
else:
newname = name
info = typeinfo[english_upper(newname)]
assert(info[-1] == obj) # sanity check
bits = info[2]
except KeyError: # bit-width name
base, bits = _evalname(name)
char = base[0]
if name == 'bool_':
char = 'b'
base = 'bool'
elif name == 'void':
char = 'V'
base = 'void'
elif name == 'object_':
char = 'O'
base = 'object'
bits = 0
elif name == 'datetime64':
char = 'M'
elif name == 'timedelta64':
char = 'm'
if sys.version_info[0] >= 3:
if name == 'bytes_':
char = 'S'
base = 'bytes'
elif name == 'str_':
char = 'U'
base = 'str'
else:
if name == 'string_':
char = 'S'
base = 'string'
elif name == 'unicode_':
char = 'U'
base = 'unicode'
bytes = bits // 8
if char != '' and bytes != 0:
char = "%s%d" % (char, bytes)
return base, bits, char
def _set_up_aliases():
type_pairs = [('complex_', 'cdouble'),
('int0', 'intp'),
('uint0', 'uintp'),
('single', 'float'),
('csingle', 'cfloat'),
('singlecomplex', 'cfloat'),
('float_', 'double'),
('intc', 'int'),
('uintc', 'uint'),
('int_', 'long'),
('uint', 'ulong'),
('cfloat', 'cdouble'),
('longfloat', 'longdouble'),
('clongfloat', 'clongdouble'),
('longcomplex', 'clongdouble'),
('bool_', 'bool'),
('unicode_', 'unicode'),
('object_', 'object')]
if sys.version_info[0] >= 3:
type_pairs.extend([('bytes_', 'string'),
('str_', 'unicode'),
('string_', 'string')])
else:
type_pairs.extend([('str_', 'string'),
('string_', 'string'),
('bytes_', 'string')])
for alias, t in type_pairs:
allTypes[alias] = allTypes[t]
sctypeDict[alias] = sctypeDict[t]
# Remove aliases overriding python types and modules
to_remove = ['ulong', 'object', 'unicode', 'int', 'long', 'float',
'complex', 'bool', 'string', 'datetime', 'timedelta']
if sys.version_info[0] >= 3:
# Py3K
to_remove.append('bytes')
to_remove.append('str')
to_remove.remove('unicode')
to_remove.remove('long')
for t in to_remove:
try:
del allTypes[t]
del sctypeDict[t]
except KeyError:
pass
def issctype(rep):
"""
Determines whether the given object represents a scalar data-type.
Parameters
----------
rep : any
If `rep` is an instance of a scalar dtype, True is returned. If not,
False is returned.
Returns
-------
out : bool
Boolean result of check whether `rep` is a scalar dtype.
See Also
--------
issubsctype, issubdtype, obj2sctype, sctype2char
Examples
--------
>>> np.issctype(np.int32)
True
>>> np.issctype(list)
False
>>> np.issctype(1.1)
False
Strings are also a scalar type:
>>> np.issctype(np.dtype('str'))
True
"""
if not isinstance(rep, (type, dtype)):
return False
try:
res = obj2sctype(rep)
if res and res != object_:
return True
return False
except:
return False
def update(self, func, default=None, testing_value=None,
missing_values=asbytes(''), locked=False):
"""
Set StringConverter attributes directly.
Parameters
----------
func : function
Conversion function.
default : any, optional
Value to return by default, that is, when the string to be
converted is flagged as missing. If not given,
`StringConverter` tries to supply a reasonable default value.
testing_value : str, optional
A string representing a standard input value of the converter.
This string is used to help defining a reasonable default
value.
missing_values : sequence of str, optional
Sequence of strings indicating a missing value.
locked : bool, optional
Whether the StringConverter should be locked to prevent
automatic upgrade or not. Default is False.
Notes
-----
`update` takes the same parameters as the constructor of
`StringConverter`, except that `func` does not accept a `dtype`
whereas `dtype_or_func` in the constructor does.
"""
self.func = func
self._locked = locked
# Don't reset the default to None if we can avoid it
if default is not None:
self.default = default
self.type = self._dtypeortype(self._getdtype(default))
else:
try:
tester = func(testing_value or asbytes('1'))
except (TypeError, ValueError):
tester = None
self.type = self._dtypeortype(self._getdtype(tester))
# Add the missing values to the existing set
if missing_values is not None:
if _is_bytes_like(missing_values):
self.missing_values.add(missing_values)
elif hasattr(missing_values, '__iter__'):
for val in missing_values:
self.missing_values.add(val)
else:
self.missing_values = []
numerictypes.py 文件源码
项目：PyDataLondon29-EmbarrassinglyParallelDAWithAWSLambda
作者: SignalMedia
项目源码
文件源码
阅读 22
收藏 0
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def bitname(obj):
"""Return a bit-width name for a given type object"""
name = obj.__name__
base = ''
char = ''
try:
if name[-1] == '_':
newname = name[:-1]
else:
newname = name
info = typeinfo[english_upper(newname)]
assert(info[-1] == obj) # sanity check
bits = info[2]
except KeyError: # bit-width name
base, bits = _evalname(name)
char = base[0]
if name == 'bool_':
char = 'b'
base = 'bool'
elif name == 'void':
char = 'V'
base = 'void'
elif name == 'object_':
char = 'O'
base = 'object'
bits = 0
elif name == 'datetime64':
char = 'M'
elif name == 'timedelta64':
char = 'm'
if sys.version_info[0] >= 3:
if name == 'bytes_':
char = 'S'
base = 'bytes'
elif name == 'str_':
char = 'U'
base = 'str'
else:
if name == 'string_':
char = 'S'
base = 'string'
elif name == 'unicode_':
char = 'U'
base = 'unicode'
bytes = bits // 8
if char != '' and bytes != 0:
char = "%s%d" % (char, bytes)
return base, bits, char
numerictypes.py 文件源码
项目：PyDataLondon29-EmbarrassinglyParallelDAWithAWSLambda
作者: SignalMedia
项目源码
文件源码
阅读 18
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def _set_up_aliases():
type_pairs = [('complex_', 'cdouble'),
('int0', 'intp'),
('uint0', 'uintp'),
('single', 'float'),
('csingle', 'cfloat'),
('singlecomplex', 'cfloat'),
('float_', 'double'),
('intc', 'int'),
('uintc', 'uint'),
('int_', 'long'),
('uint', 'ulong'),
('cfloat', 'cdouble'),
('longfloat', 'longdouble'),
('clongfloat', 'clongdouble'),
('longcomplex', 'clongdouble'),
('bool_', 'bool'),
('unicode_', 'unicode'),
('object_', 'object')]
if sys.version_info[0] >= 3:
type_pairs.extend([('bytes_', 'string'),
('str_', 'unicode'),
('string_', 'string')])
else:
type_pairs.extend([('str_', 'string'),
('string_', 'string'),
('bytes_', 'string')])
for alias, t in type_pairs:
allTypes[alias] = allTypes[t]
sctypeDict[alias] = sctypeDict[t]
# Remove aliases overriding python types and modules
to_remove = ['ulong', 'object', 'unicode', 'int', 'long', 'float',
'complex', 'bool', 'string', 'datetime', 'timedelta']
if sys.version_info[0] >= 3:
# Py3K
to_remove.append('bytes')
to_remove.append('str')
to_remove.remove('unicode')
to_remove.remove('long')
for t in to_remove:
try:
del allTypes[t]
del sctypeDict[t]
except KeyError:
pass
numerictypes.py 文件源码
项目：PyDataLondon29-EmbarrassinglyParallelDAWithAWSLambda
作者: SignalMedia
项目源码
文件源码
阅读 23
收藏 0
点赞 0
评论 0
def issctype(rep):
"""
Determines whether the given object represents a scalar data-type.
Parameters
----------
rep : any
If `rep` is an instance of a scalar dtype, True is returned. If not,
False is returned.
Returns
-------
out : bool
Boolean result of check whether `rep` is a scalar dtype.
See Also
--------
issubsctype, issubdtype, obj2sctype, sctype2char
Examples
--------
>>> np.issctype(np.int32)
True
>>> np.issctype(list)
False
>>> np.issctype(1.1)
False
Strings are also a scalar type:
>>> np.issctype(np.dtype('str'))
True
"""
if not isinstance(rep, (type, dtype)):
return False
try:
res = obj2sctype(rep)
if res and res != object_:
return True
return False
except:
return False
def bitname(obj):
"""Return a bit-width name for a given type object"""
name = obj.__name__
base = ''
char = ''
try:
if name[-1] == '_':
newname = name[:-1]
else:
newname = name
info = typeinfo[english_upper(newname)]
assert(info[-1] == obj) # sanity check
bits = info[2]
except KeyError: # bit-width name
base, bits = _evalname(name)
char = base[0]
if name == 'bool_':
char = 'b'
base = 'bool'
elif name == 'void':
char = 'V'
base = 'void'
elif name == 'object_':
char = 'O'
base = 'object'
bits = 0
elif name == 'datetime64':
char = 'M'
elif name == 'timedelta64':
char = 'm'
if sys.version_info[0] >= 3:
if name == 'bytes_':
char = 'S'
base = 'bytes'
elif name == 'str_':
char = 'U'
base = 'str'
else:
if name == 'string_':
char = 'S'
base = 'string'
elif name == 'unicode_':
char = 'U'
base = 'unicode'
bytes = bits // 8
if char != '' and bytes != 0:
char = "%s%d" % (char, bytes)
return base, bits, char
def _set_up_aliases():
type_pairs = [('complex_', 'cdouble'),
('int0', 'intp'),
('uint0', 'uintp'),
('single', 'float'),
('csingle', 'cfloat'),
('singlecomplex', 'cfloat'),
('float_', 'double'),
('intc', 'int'),
('uintc', 'uint'),
('int_', 'long'),
('uint', 'ulong'),
('cfloat', 'cdouble'),
('longfloat', 'longdouble'),
('clongfloat', 'clongdouble'),
('longcomplex', 'clongdouble'),
('bool_', 'bool'),
('unicode_', 'unicode'),
('object_', 'object')]
if sys.version_info[0] >= 3:
type_pairs.extend([('bytes_', 'string'),
('str_', 'unicode'),
('string_', 'string')])
else:
type_pairs.extend([('str_', 'string'),
('string_', 'string'),
('bytes_', 'string')])
for alias, t in type_pairs:
allTypes[alias] = allTypes[t]
sctypeDict[alias] = sctypeDict[t]
# Remove aliases overriding python types and modules
to_remove = ['ulong', 'object', 'unicode', 'int', 'long', 'float',
'complex', 'bool', 'string', 'datetime', 'timedelta']
if sys.version_info[0] >= 3:
# Py3K
to_remove.append('bytes')
to_remove.append('str')
to_remove.remove('unicode')
to_remove.remove('long')
for t in to_remove:
try:
del allTypes[t]
del sctypeDict[t]
except KeyError:
pass
def issctype(rep):
"""
Determines whether the given object represents a scalar data-type.
Parameters
----------
rep : any
If `rep` is an instance of a scalar dtype, True is returned. If not,
False is returned.
Returns
-------
out : bool
Boolean result of check whether `rep` is a scalar dtype.
See Also
--------
issubsctype, issubdtype, obj2sctype, sctype2char
Examples
--------
>>> np.issctype(np.int32)
True
>>> np.issctype(list)
False
>>> np.issctype(1.1)
False
Strings are also a scalar type:
>>> np.issctype(np.dtype('str'))
True
"""
if not isinstance(rep, (type, dtype)):
return False
try:
res = obj2sctype(rep)
if res and res != object_:
return True
return False
except:
return False
def update(self, func, default=None, testing_value=None,
missing_values=asbytes(''), locked=False):
"""
Set StringConverter attributes directly.
Parameters
----------
func : function
Conversion function.
default : any, optional
Value to return by default, that is, when the string to be
converted is flagged as missing. If not given,
`StringConverter` tries to supply a reasonable default value.
testing_value : str, optional
A string representing a standard input value of the converter.
This string is used to help defining a reasonable default
value.
missing_values : sequence of str, optional
Sequence of strings indicating a missing value.
locked : bool, optional
Whether the StringConverter should be locked to prevent
automatic upgrade or not. Default is False.
Notes
-----
`update` takes the same parameters as the constructor of
`StringConverter`, except that `func` does not accept a `dtype`
whereas `dtype_or_func` in the constructor does.
"""
self.func = func
self._locked = locked
# Don't reset the default to None if we can avoid it
if default is not None:
self.default = default
self.type = self._dtypeortype(self._getdtype(default))
else:
try:
tester = func(testing_value or asbytes('1'))
except (TypeError, ValueError):
tester = None
self.type = self._dtypeortype(self._getdtype(tester))
# Add the missing values to the existing set
if missing_values is not None:
if _is_bytes_like(missing_values):
self.missing_values.add(missing_values)
elif hasattr(missing_values, '__iter__'):
for val in missing_values:
self.missing_values.add(val)
else:
self.missing_values = []
def bitname(obj):
"""Return a bit-width name for a given type object"""
name = obj.__name__
base = ''
char = ''
try:
if name[-1] == '_':
newname = name[:-1]
else:
newname = name
info = typeinfo[english_upper(newname)]
assert(info[-1] == obj) # sanity check
bits = info[2]
except KeyError: # bit-width name
base, bits = _evalname(name)
char = base[0]
if name == 'bool_':
char = 'b'
base = 'bool'
elif name == 'void':
char = 'V'
base = 'void'
elif name == 'object_':
char = 'O'
base = 'object'
bits = 0
elif name == 'datetime64':
char = 'M'
elif name == 'timedelta64':
char = 'm'
if sys.version_info[0] >= 3:
if name == 'bytes_':
char = 'S'
base = 'bytes'
elif name == 'str_':
char = 'U'
base = 'str'
else:
if name == 'string_':
char = 'S'
base = 'string'
elif name == 'unicode_':
char = 'U'
base = 'unicode'
bytes = bits // 8
if char != '' and bytes != 0:
char = "%s%d" % (char, bytes)
return base, bits, char
def _set_up_aliases():
type_pairs = [('complex_', 'cdouble'),
('int0', 'intp'),
('uint0', 'uintp'),
('single', 'float'),
('csingle', 'cfloat'),
('singlecomplex', 'cfloat'),
('float_', 'double'),
('intc', 'int'),
('uintc', 'uint'),
('int_', 'long'),
('uint', 'ulong'),
('cfloat', 'cdouble'),
('longfloat', 'longdouble'),
('clongfloat', 'clongdouble'),
('longcomplex', 'clongdouble'),
('bool_', 'bool'),
('unicode_', 'unicode'),
('object_', 'object')]
if sys.version_info[0] >= 3:
type_pairs.extend([('bytes_', 'string'),
('str_', 'unicode'),
('string_', 'string')])
else:
type_pairs.extend([('str_', 'string'),
('string_', 'string'),
('bytes_', 'string')])
for alias, t in type_pairs:
allTypes[alias] = allTypes[t]
sctypeDict[alias] = sctypeDict[t]
# Remove aliases overriding python types and modules
to_remove = ['ulong', 'object', 'unicode', 'int', 'long', 'float',
'complex', 'bool', 'string', 'datetime', 'timedelta']
if sys.version_info[0] >= 3:
# Py3K
to_remove.append('bytes')
to_remove.append('str')
to_remove.remove('unicode')
to_remove.remove('long')
for t in to_remove:
try:
del allTypes[t]
del sctypeDict[t]
except KeyError:
pass
def issctype(rep):
"""
Determines whether the given object represents a scalar data-type.
Parameters
----------
rep : any
If `rep` is an instance of a scalar dtype, True is returned. If not,
False is returned.
Returns
-------
out : bool
Boolean result of check whether `rep` is a scalar dtype.
See Also
--------
issubsctype, issubdtype, obj2sctype, sctype2char
Examples
--------
>>> np.issctype(np.int32)
True
>>> np.issctype(list)
False
>>> np.issctype(1.1)
False
Strings are also a scalar type:
>>> np.issctype(np.dtype('str'))
True
"""
if not isinstance(rep, (type, dtype)):
return False
try:
res = obj2sctype(rep)
if res and res != object_:
return True
return False
except:
return False
def update(self, func, default=None, testing_value=None,
missing_values=asbytes(''), locked=False):
"""
Set StringConverter attributes directly.
Parameters
----------
func : function
Conversion function.
default : any, optional
Value to return by default, that is, when the string to be
converted is flagged as missing. If not given,
`StringConverter` tries to supply a reasonable default value.
testing_value : str, optional
A string representing a standard input value of the converter.
This string is used to help defining a reasonable default
value.
missing_values : sequence of str, optional
Sequence of strings indicating a missing value.
locked : bool, optional
Whether the StringConverter should be locked to prevent
automatic upgrade or not. Default is False.
Notes
-----
`update` takes the same parameters as the constructor of
`StringConverter`, except that `func` does not accept a `dtype`
whereas `dtype_or_func` in the constructor does.
"""
self.func = func
self._locked = locked
# Don't reset the default to None if we can avoid it
if default is not None:
self.default = default
self.type = self._dtypeortype(self._getdtype(default))
else:
try:
tester = func(testing_value or asbytes('1'))
except (TypeError, ValueError):
tester = None
self.type = self._dtypeortype(self._getdtype(tester))
# Add the missing values to the existing set
if missing_values is not None:
if _is_bytes_like(missing_values):
self.missing_values.add(missing_values)
elif hasattr(missing_values, '__iter__'):
for val in missing_values:
self.missing_values.add(val)
else:
self.missing_values = []
def bitname(obj):
"""Return a bit-width name for a given type object"""
name = obj.__name__
base = ''
char = ''
try:
if name[-1] == '_':
newname = name[:-1]
else:
newname = name
info = typeinfo[english_upper(newname)]
assert(info[-1] == obj) # sanity check
bits = info[2]
except KeyError: # bit-width name
base, bits = _evalname(name)
char = base[0]
if name == 'bool_':
char = 'b'
base = 'bool'
elif name == 'void':
char = 'V'
base = 'void'
elif name == 'object_':
char = 'O'
base = 'object'
bits = 0
elif name == 'datetime64':
char = 'M'
elif name == 'timedelta64':
char = 'm'
if sys.version_info[0] >= 3:
if name == 'bytes_':
char = 'S'
base = 'bytes'
elif name == 'str_':
char = 'U'
base = 'str'
else:
if name == 'string_':
char = 'S'
base = 'string'
elif name == 'unicode_':
char = 'U'
base = 'unicode'
bytes = bits // 8
if char != '' and bytes != 0:
char = "%s%d" % (char, bytes)
return base, bits, char
