Images can contain EXIF metadata that describes information about the image, such as creation date, the device used to create the image, exposure data, GPS geotagging, keywords, compression, flash info, and lots more. In addition to the standard tags defined by camera manufacturers, you can also add your own tags with information as key/value pairs. NOTE: This module requires that the "exiftool" command-line tool is installed on the system running pyexif. It is freely available at: http://www.sno.phy.queensu.ca/~phil/exiftool/ If exiftool is not installed, a warning message will be printed to stdout, and the module will not work. Common Actions Please note that any of the write operations *immediately* affect the image file. Please operate on a copy of the original. Keyword Manipulation ==================== getKeywords(): returns a list of all keywords. setKeywords(list of keywords): accepts a list of strings, and sets the keywords for that image to that list. Any existing keywords are overwritten. addKeyword(word): Appends the passed keyword to the image's keywords. addKeyword(list of words): Convenience method for adding several keywords at once. clearKeywords(): Removes all current keywords. Date Functions ============== getOriginalDateTime(): Returns the datetime for the image's creation, or None if not set. setOriginalDateTime(dttm): Sets the image's original datetime to the passed datetime value. getModificationDateTime(): Returns the modification datetime for the image, or None if not set. setModificationDateTime(dttm): Sets the image's modification datetime to the passed datetime value. Image Manipulation ================== rotateCW(num=1): Rotates the image clockwise for 'num' 90-degree steps. rotateCCW(num=1): Rotates the image counter-clockwise for 'num' 90-degree steps. mirrorVertically(): Flips the image top to bottom. mirrorHorizontally: Flips the image left to right. Tag Manipulation ================ getTag(tag): returns the current value of the specified tag, or None if the tag does not exist. setTag(tag, val): sets the specified tag to the specified value.