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Python standard library: io
The io module provides interfaces to stream handling .
Among others, this module defines the built-in function
open .
dir(io) import io
for e in sorted(dir(io), key=lambda s: s.lower()): print(e)
__all__ __author__ __builtins__ __cached__ __doc__ __file__ __getattr__ __loader__ __name__ __package__ __spec__ _io _WindowsConsoleIO abc BlockingIOError BufferedIOBase BufferedRandom BufferedReader BufferedRWPair BufferedWriter BytesIO DEFAULT_BUFFER_SIZE FileIO IncrementalNewlineDecoder IOBase open open_code RawIOBase SEEK_CUR SEEK_END SEEK_SET StringIO The StringIO class creates a «file-like» object from a string, which allows to read from it as if it were a file. Compare with csv .StringIO text_encoding TextIOBase TextIOWrapper UnsupportedOperation
File objects
Python deals with three kinds of file objects.
binary files
buffered binary files
text files
These interfaces are defined in the io module.
See also the
open function.
StringIO
In
Python ,
strings are immutable. So they cannot be modified in-place.
However, with the io module, such an in-place modification can be simulated with StringIO():
import io
txt = 'Hello world!'
txt_io = io.StringIO(txt)
print(txt_io.getvalue())
txt_io.seek(6)
txt_io.write('there')
print(txt_io.getvalue())
open
io.open() is the same function as the built-in function
open().
Slurp content of file into a variable
The content of an entire file can easily be read into a variable with the following construct. __file__ needs to be replaced with the filename to be read:
with open (__file__, 'r') as f:
text = f.read()
print(text)