本文整理汇总了Python中array.array.tostring方法的典型用法代码示例。如果您正苦于以下问题：Python array.tostring方法的具体用法？Python array.tostring怎么用？Python array.tostring使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类array.array的用法示例。
在下文中一共展示了array.tostring方法的11个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: make_palette
# 需要导入模块: from array import array [as 别名]
# 或者: from array.array import tostring [as 别名]
def make_palette(self):
"""Create the byte sequences for a ``PLTE`` and if necessary a
``tRNS`` chunk. Returned as a pair (*p*, *t*). *t* will be
``None`` if no ``tRNS`` chunk is necessary.
"""
p = array('B')
t = array('B')
for x in self.palette:
p.extend(x[0:3])
if len(x) > 3:
t.append(x[3])
p = tostring(p)
t = tostring(t)
if t:
return p,t
return p,None 示例2: make_palette
# 需要导入模块: from array import array [as 别名]
# 或者: from array.array import tostring [as 别名]
def make_palette(self):
"""Create the byte sequences for a ``PLTE`` and if necessary a
``tRNS`` chunk. Returned as a pair (*p*, *t*). *t* will be
``None`` if no ``tRNS`` chunk is necessary.
"""
p = array('B')
t = array('B')
for x in self.palette:
p.extend(x[0:3])
if len(x) > 3:
t.append(x[3])
p = tostring(p)
t = tostring(t)
if t:
return p, t
return p, None 示例3: tostring
# 需要导入模块: from array import array [as 别名]
# 或者: from array.array import tostring [as 别名]
def tostring(row):
l = len(row)
return struct.pack('%dB' % l, *row) 示例4: read
# 需要导入模块: from array import array [as 别名]
# 或者: from array.array import tostring [as 别名]
def read(self, n):
r = self.buf[self.offset:self.offset+n]
if isarray(r):
r = r.tostring()
self.offset += n
return r 示例5: serialtoflat
# 需要导入模块: from array import array [as 别名]
# 或者: from array.array import tostring [as 别名]
def serialtoflat(self, bytes, width=None):
"""Convert serial format (byte stream) pixel data to flat row
flat pixel.
"""
if self.bitdepth == 8:
return bytes
if self.bitdepth == 16:
bytes = tostring(bytes)
return array('H',
struct.unpack('!%dH' % (len(bytes)//2), bytes))
assert self.bitdepth < 8
if width is None:
width = self.width
# Samples per byte
spb = 8//self.bitdepth
out = array('B')
mask = 2**self.bitdepth - 1
shifts = map(self.bitdepth.__mul__, reversed(range(spb)))
l = width
for o in bytes:
out.extend([(mask&(o>>s)) for s in shifts][:l])
l -= spb
if l <= 0:
l = width
return out 示例6: tostring
# 需要导入模块: from array import array [as 别名]
# 或者: from array.array import tostring [as 别名]
def tostring(row):
l = len(row)
return struct.pack('%dB' % l, *row) 示例7: iterboxed
# 需要导入模块: from array import array [as 别名]
# 或者: from array.array import tostring [as 别名]
def iterboxed(self, rows):
"""Iterator that yields each scanline in boxed row flat pixel
format. `rows` should be an iterator that yields the bytes of
each row in turn.
"""
def asvalues(raw):
"""Convert a row of raw bytes into a flat row. Result may
or may not share with argument"""
if self.bitdepth == 8:
return raw
if self.bitdepth == 16:
raw = tostring(raw)
return array('H', struct.unpack('!%dH' % (len(raw)//2), raw))
assert self.bitdepth < 8
width = self.width
# Samples per byte
spb = 8//self.bitdepth
out = array('B')
mask = 2**self.bitdepth - 1
shifts = map(self.bitdepth.__mul__, reversed(range(spb)))
for o in raw:
out.extend(map(lambda i: mask&(o>>i), shifts))
return out[:width]
return itertools.imap(asvalues, rows) 示例8: testTrnsArray
# 需要导入模块: from array import array [as 别名]
# 或者: from array.array import tostring [as 别名]
def testTrnsArray(self):
"""Test that reading a type 2 PNG with tRNS chunk yields each
row as an array (using asDirect)."""
r = Reader(bytes=_pngsuite['tbrn2c08'])
list(r.asDirect()[2])[0].tostring
# Invalid file format tests. These construct various badly
# formatted PNG files, then feed them into a Reader. When
# everything is working properly, we should get FormatError
# exceptions raised. 示例9: iterboxed
# 需要导入模块: from array import array [as 别名]
# 或者: from array.array import tostring [as 别名]
def iterboxed(self, rows):
"""Iterator that yields each scanline in boxed row flat pixel
format. `rows` should be an iterator that yields the bytes of
each row in turn.
"""
def asvalues(raw):
"""Convert a row of raw bytes into a flat row. Result may
or may not share with argument"""
if self.bitdepth == 8:
return raw
if self.bitdepth == 16:
raw = tostring(raw)
return array('H', struct.unpack('!%dH' % (len(raw)//2), raw))
assert self.bitdepth < 8
width = self.width
# Samples per byte
spb = 8//self.bitdepth
out = array('B')
mask = 2**self.bitdepth - 1
shifts = list(map(self.bitdepth.__mul__, reversed(list(range(spb)))))
for o in raw:
out.extend([mask&(o>>i) for i in shifts])
return out[:width]
return map(asvalues, rows) 示例10: read
# 需要导入模块: from array import array [as 别名]
# 或者: from array.array import tostring [as 别名]
def read(self, n):
r = self.buf[self.offset:self.offset + n]
if isarray(r):
r = r.tostring()
self.offset += n
return r 示例11: iterboxed
# 需要导入模块: from array import array [as 别名]
# 或者: from array.array import tostring [as 别名]
def iterboxed(self, rows):
"""Iterator that yields each scanline in boxed row flat pixel
format. `rows` should be an iterator that yields the bytes of
each row in turn.
"""
def asvalues(raw):
"""Convert a row of raw bytes into a flat row. Result may
or may not share with argument"""
if self.bitdepth == 8:
return raw
if self.bitdepth == 16:
raw = tostring(raw)
return array('H', struct.unpack('!%dH' % (len(raw) // 2), raw))
assert self.bitdepth < 8
width = self.width
# Samples per byte
spb = 8 // self.bitdepth
out = array('B')
mask = 2 ** self.bitdepth - 1
shifts = map(self.bitdepth.__mul__, reversed(range(spb)))
for o in raw:
out.extend(map(lambda i: mask & (o >> i), shifts))
return out[:width]
return itertools.imap(asvalues, rows)