def writeData(writer, filename, data):
key = Text()
value = BytesWritable()
key.set(filename)
value.set(data)
writer.append(key, value)
def convert_to_sequencefiles(cpp_encrypted_data):
# Get all data files outputted by C++
partition_pattern = os.path.join(cpp_encrypted_data, "data/cpp-part*")
partition_files = glob.glob(partition_pattern)
# Convert each partition to SequenceFile format
for partition_file in partition_files:
# FIXME: should we stream this so we dont load entire 1 GB into memory?
with open(partition_file, "rb") as partition:
partition_data = partition.read()
# FIXME: better way of generating new file name
# This way has the limitation of original path cannot contain `cpp-`
output_partition_file = partition_file.replace("cpp-", "")
sequence_file_writer = SequenceFile.createWriter(
output_partition_file, IntWritable, BytesWritable)
key = IntWritable()
value = BytesWritable()
key.set(0)
value.set(partition_data)
sequence_file_writer.append(key, value)
sequence_file_writer.close()
# Remove temporary file generated by C++
os.remove(partition_file)
def sequence(file_out, s3_files_in, make_key, tempvaluefile="/tmp/temp.nc"):
"""
String file path to write to
A list of string file paths to read from. Each file in is encoded to a
different k, v pair, with the key equal to the cube's metadata
make_key is a function with takes a cube and returns a uid string
"""
keys_done = []
writer = SequenceFile.createWriter(file_out, Text, BytesWritable)
for s3_file_in in s3_files_in:
f = get_s3_file(s3_file_in, tempvaluefile)
c = iris.load_cube(f)
key_writer = Text()
if (str(c.metadata) in keys_done):
warnings.warn("Key for file " + f +
" already present - overwriting")
key_writer.set(make_key(c))
keys_done.append(str(c.metadata))
value_writer = BytesWritable()
with open(tempvaluefile, "rb") as f:
print s3_file_in
value_writer.set(f.read())
writer.append(key_writer, value_writer)
writer.close()
def sequence(file_out, s3_files_in, make_key, tempvaluefile="/tmp/temp.nc"):
"""
String file path to write to
A list of string file paths to read from. Each file in is encoded to a
different k, v pair, with the key equal to the cube's metadata
make_key is a function with takes a cube and returns a uid string
"""
keys_done = []
writer = SequenceFile.createWriter(file_out, Text, BytesWritable)
for s3_file_in in s3_files_in:
f = get_s3_file(s3_file_in, tempvaluefile)
c = iris.load_cube(f)
key_writer = Text()
if (str(c.metadata) in keys_done):
warnings.warn("Key for file "+f+" already present - overwriting")
key_writer.set(make_key(c))
keys_done.append(str(c.metadata))
value_writer = BytesWritable()
with open(tempvaluefile, "rb") as f:
print s3_file_in
value_writer.set(f.read())
writer.append(key_writer, value_writer)
writer.close()
def writeData(writer):
key = BytesWritable()
value = BytesWritable()
# for i in xrange(1000):
key.set("A")
value.set("B")
print '[%d] %s %s' % (writer.getLength(), key.toString(), value.toString())
writer.append(key, value)
def writeData(self, key, value):
datetime_now = time.localtime(time.time())
if datetime_now.tm_mday != self.file_time.tm_mday or datetime_now.tm_hour != self.file_time.tm_hour:
self.writer = self.create_writer(self.writer)
writer = self.writer
writer_key = Text()
writer_value = BytesWritable()
writer_key.set(key)
writer_value.set(value)
#print '[%d] %s %s' % (writer.getLength(), writer_key.toString(), writer_value.toString())
writer.append(writer_key, writer_value)
def write_seq_file(file_name, data_dict):
writer = SequenceFile.createWriter(file_name, Text, BytesWritable)
for key, value in data_dict.iteritems():
print key, ", " ,
key_writer = Text()
key_writer.set(key)
value_writer = BytesWritable()
iris.save(value, "temp.nc")
with open("temp.nc", "rb") as f:
value_writer.set(f.read())
writer.append(key_writer, value_writer)
writer.close()
def write_seq_file(file_name, data_dict):
writer = SequenceFile.createWriter(file_name, Text, BytesWritable)
for key, value in data_dict.iteritems():
print key, ", ",
key_writer = Text()
key_writer.set(key)
value_writer = BytesWritable()
iris.save(value, "temp.nc")
with open("temp.nc", "rb") as f:
value_writer.set(f.read())
writer.append(key_writer, value_writer)
writer.close()
def writeData(writer):
key = BytesWritable()
value = BytesWritable()
# for i in xrange(1000):
key.set("A")
value.set("B")
print '[%d] %s %s' % (writer.getLength(), key.toString(), value.toString())
writer.append(key, value)
def importSGY(sgyFilename, rddFilename):
# os.remove(rddFilename)
fp = open(sgyFilename, 'rb')
writer = SequenceFile.createWriter(rddFilename, IntWritable, BytesWritable)
SH = segypy.getSegyHeader(sgyFilename, 3600, segypy.endian)
bps = segypy.getBytePerSample(SH)
filesize = os.path.getsize(sgyFilename)
samp_count = SH['ns']
data_len = samp_count * bps
trace_size = data_len + 240
ntraces = (filesize - 3600) / trace_size
data = fp.read(3600)
for trace_num in range(ntraces):
SegyTraceHeader = fp.read(240)
SegyTraceData = fp.read(data_len)
error - segypy.getValue is not correct
SegyTraceData = segypy.getValue(
SegyTraceData, 0, 'float', segypy.endian, samp_count)
writer.append(IntWritable(trace_num), BytesWritable(
str(SegyTraceHeader) + str(SegyTraceData)))
