diff options
Diffstat (limited to 'src/pyexiv2.py')
| -rw-r--r-- | src/pyexiv2.py | 124 |
1 files changed, 63 insertions, 61 deletions
diff --git a/src/pyexiv2.py b/src/pyexiv2.py index 8fa1c9b..cd13a5c 100644 --- a/src/pyexiv2.py +++ b/src/pyexiv2.py @@ -332,57 +332,6 @@ def StringToRational(string): else: return Rational(*map(long, match.groups())) -def ConvertToPythonType(tagFamily, tagType, tagValue): - """ - Types a tag value using Python's built-in types or modules. - - Whenever possible, the value is typed using Python's built-in types or - modules such as date when the value represents a date (e.g. the IPTC tag - 'Iptc.Application2.DateCreated'). - For EXIF rational number, custom type pyexiv2.Rational is used. - - Keyword arguments: - tagFamily -- the family of the tag ('Exif' or 'Iptc') - tagType -- the type of the tag as defined in the EXIF and IPTC specifications - tagValue -- the value of the tag as a raw string - """ - value = tagValue - if tagFamily == 'Exif': - if tagType == 'Byte': - pass - elif tagType == 'Ascii': - # try to guess if the value is a datetime - value = StringToDateTime(tagValue) - elif tagType == 'Short': - value = int(tagValue) - elif tagType == 'Long' or tagType == 'SLong': - value = long(tagValue) - elif tagType == 'Rational' or tagType == 'SRational': - value = StringToRational(tagValue) - elif tagType == 'Undefined': - # tagValue is a sequence of bytes whose codes are written as a - # string, each code being followed by a blank space (e.g. - # "48 50 50 49 " for "0221"). - try: - value = UndefinedToString(tagValue) - except ValueError: - # Some tags such as "Exif.Photo.UserComment" are marked as - # Undefined but do not store their value as expected. - # This should fix bug #173387. - pass - elif tagFamily == 'Iptc': - if tagType == 'Short': - value = int(tagValue) - elif tagType == 'String': - pass - elif tagType == 'Date': - value = StringToDate(tagValue) - elif tagType == 'Time': - value = StringToTime(tagValue) - elif tagType == 'Undefined': - pass - return value - class MetadataTag(object): @@ -413,7 +362,7 @@ class MetadataTag(object): 'Label = ' + self.label + os.linesep + \ 'Description = ' + self.description + os.linesep + \ 'Type = ' + self.type + os.linesep + \ - 'Raw value = ' + self.value + 'Raw value = ' + str(self.value) return r @@ -430,6 +379,34 @@ class ExifTag(MetadataTag): """ MetadataTag.__init__(self, key, name, label, description, type, value) self.fvalue = fvalue + self.__convert_value_to_python_type() + + def __convert_value_to_python_type(self): + """ + Convert the stored value from a string to the matching Python type. + """ + if self.type == 'Byte': + pass + elif self.type == 'Ascii': + # try to guess if the value is a datetime + self.value = StringToDateTime(self.value) + elif self.type == 'Short': + self.value = int(self.value) + elif self.type == 'Long' or self.type == 'SLong': + self.value = long(self.value) + elif self.type == 'Rational' or self.type == 'SRational': + self.value = StringToRational(self.value) + elif self.type == 'Undefined': + # self.value is a sequence of bytes whose codes are written as a + # string, each code being followed by a blank space (e.g. + # "48 50 50 49 " for "0221" in the "Exif.Photo.ExifVersion" tag). + try: + self.value = UndefinedToString(self.value) + except ValueError: + # Some tags such as "Exif.Photo.UserComment" are marked as + # Undefined but do not store their value as expected. + # This should fix bug #173387. + pass def __str__(self): """ @@ -447,14 +424,33 @@ class IptcTag(MetadataTag): property). """ + def __init__(self, key, name, label, description, type, values): + """ + Constructor. + """ + MetadataTag.__init__(self, key, name, label, description, type, values) + self.__convert_values_to_python_type() + + def __convert_values_to_python_type(self): + """ + Convert the stored values from strings to the matching Python type. + """ + if self.type == 'Short': + self.value = map(int, self.value) + elif self.type == 'String': + pass + elif self.type == 'Date': + self.value = map(StringToDate, self.value) + elif self.type == 'Time': + self.value = map(StringToTime, self.value) + elif self.type == 'Undefined': + pass + def __str__(self): """ Return a string representation of the metadata tag. """ - values = self.value - self.value = str(values) r = MetadataTag.__str__(self) - self.value = values return r.replace('Raw value = ', 'Raw values = ') @@ -470,22 +466,28 @@ class Image(libexiv2python.Image): """ def __init__(self, filename): - if filename.__class__ is unicode: - filename = filename.encode('utf-8') - libexiv2python.Image.__init__(self, filename) + f = filename + if f.__class__ is unicode: + f = f.encode('utf-8') + libexiv2python.Image.__init__(self, f) self.__exifTagsDict = {} - #self.__iptcTagsDict = {} + self.__iptcTagsDict = {} self.__exifCached = False - #self.__iptcCached = False + self.__iptcCached = False def __get_exif_tag(self, key): """ DOCME """ tag = ExifTag(*self.__getExifTag(key)) - # TODO: convert value to python type, other processing return tag + def __get_iptc_tag(self, key): + """ + DOCME + """ + tag = IptcTag(*self.__getIptcTag(key)) + return tag def __getExifTagValue(self, key): """ |