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__all__ = ['oldtype2dtype', 'convtypecode', 'convtypecode2', 'oldtypecodes']
import numpy as np
oldtype2dtype = {'1': np.dtype(np.byte),
's': np.dtype(np.short),
# 'i': np.dtype(np.intc),
# 'l': np.dtype(int),
# 'b': np.dtype(np.ubyte),
'w': np.dtype(np.ushort),
'u': np.dtype(np.uintc),
# 'f': np.dtype(np.single),
# 'd': np.dtype(float),
# 'F': np.dtype(np.csingle),
# 'D': np.dtype(complex),
# 'O': np.dtype(object),
# 'c': np.dtype('c'),
None: np.dtype(int)
}
# converts typecode=None to int
def convtypecode(typecode, dtype=None):
if dtype is None:
try:
return oldtype2dtype[typecode]
except:
return np.dtype(typecode)
else:
return dtype
#if both typecode and dtype are None
# return None
def convtypecode2(typecode, dtype=None):
if dtype is None:
if typecode is None:
return None
else:
try:
return oldtype2dtype[typecode]
except:
return np.dtype(typecode)
else:
return dtype
_changedtypes = {'B': 'b',
'b': '1',
'h': 's',
'H': 'w',
'I': 'u'}
class _oldtypecodes(dict):
def __getitem__(self, obj):
char = np.dtype(obj).char
try:
return _changedtypes[char]
except KeyError:
return char
oldtypecodes = _oldtypecodes()