HfstInputStream

• class HfstInputStream
  • __init__ (self, filename=None)
  • close (self)
  • is_eof (self)
  • is_bad (self)
  • is_good (self)
  • get_type (self)
  • read (self)

---

class HfstInputStream

A stream for reading HFST binary transducers.

An example:

istr = hfst.HfstInputStream('testfile1.hfst')
transducers = []
while not (istr.is_eof()):
    transducers.append(istr.read())
istr.close()
print("Read %i transducers in total." % len(transducers))

For documentation on the HFST binary transducer format, see here.

---

__init__ (self, filename=None)

Create a stream for reading binary transducers.

Parameters:

• filename The name of the transducer file. If not given, standard input is used.

Throws:

• hfst.exceptions.StreamNotReadableException
• hfst.exceptions.NotTransducerStreamException
• hfst.exceptions.EndOfStreamException
• hfst.exceptions.TransducerHeaderException

istr_to_stdin = hfst.HfstInputStream()
istr_to_file = hfst.HfstInputStream(filename='transducer.hfst')

---

close (self)

Close the stream.

If the stream points to standard input, nothing is done.

---

is_eof (self)

Whether the stream is at end.

---

is_bad (self)

Whether badbit is set.

---

is_good (self)

Whether the state of the stream is good for input operations.

---

get_type (self)

The type of the first transducer in the stream.

By default, all transducers in a stream have the same type, else a TransducerTypeMismatchException is thrown when reading the first transducer that has a different type than the previous ones.

---

read (self)

Return next transducer.

Throws:

• hfst.exceptions.EndOfStreamException

---

read_all(self)

Return all transducers in stream.

Returns: A list of transducers.