pytornado.fileio package¶
Submodules¶
pytornado.fileio.utils module¶
Utils for reading and writing files
Developed at Airinnova AB, Stockholm, Sweden.
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class
pytornado.fileio.utils.NDArrayEncoder(*, skipkeys=False, ensure_ascii=True, check_circular=True, allow_nan=True, sort_keys=False, indent=None, separators=None, default=None)¶ Bases:
json.encoder.JSONEncoderSerialise numpy arrays
Use with: json.dump(obj, fp, cls=NDArrayEncoder)
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default(obj)¶ Implement this method in a subclass such that it returns a serializable object for
o, or calls the base implementation (to raise aTypeError).For example, to support arbitrary iterators, you could implement default like this:
def default(self, o): try: iterable = iter(o) except TypeError: pass else: return list(iterable) # Let the base class default method raise the TypeError return JSONEncoder.default(self, o)
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pytornado.fileio.utils.dump_pretty_json(obj, fp, *, skipkeys=False, ensure_ascii=True, check_circular=True, allow_nan=True, cls=<class 'pytornado.fileio.utils.NDArrayEncoder'>, indent=4, separators=(', ', ': '), default=None, sort_keys=False, **kw)¶ Serialize
objas a JSON formatted stream tofp(a.write()-supporting file-like object).If
skipkeysis true thendictkeys that are not basic types (str,int,float,bool,None) will be skipped instead of raising aTypeError.If
ensure_asciiis false, then the strings written tofpcan contain non-ASCII characters if they appear in strings contained inobj. Otherwise, all such characters are escaped in JSON strings.If
check_circularis false, then the circular reference check for container types will be skipped and a circular reference will result in anOverflowError(or worse).If
allow_nanis false, then it will be aValueErrorto serialize out of rangefloatvalues (nan,inf,-inf) in strict compliance of the JSON specification, instead of using the JavaScript equivalents (NaN,Infinity,-Infinity).If
indentis a non-negative integer, then JSON array elements and object members will be pretty-printed with that indent level. An indent level of 0 will only insert newlines.Noneis the most compact representation.If specified,
separatorsshould be an(item_separator, key_separator)tuple. The default is(', ', ': ')if indent isNoneand(',', ': ')otherwise. To get the most compact JSON representation, you should specify(',', ':')to eliminate whitespace.default(obj)is a function that should return a serializable version of obj or raise TypeError. The default simply raises TypeError.If sort_keys is true (default:
False), then the output of dictionaries will be sorted by key.To use a custom
JSONEncodersubclass (e.g. one that overrides the.default()method to serialize additional types), specify it with theclskwarg; otherwiseJSONEncoderis used.
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pytornado.fileio.utils.parse_str(entry, allow_char='-_')¶ Strip undesired characters from a string
- Note:
- Alphanumeric characters always accepted: [a…z], [A…Z], [0…9]
- Args:
entry: (string) Input string allow_char: (string) Additional accepted characters allow_none: (bool) Detect when input is None allow_bool: (bool) Detect when input is True or False - Returns:
parsed_string: Parsed string
Module contents¶
The fileio package contains the modules dedicated to the input and output of data to and from file. Each module is itself associated with a given file type.