ENH: Add GIFTI object __repr__ methods

nibabel/gifti/gifti.py

@@ -95,6 +95,9 @@ class GiftiLabelTable(xml.XmlSerializable):
     def __init__(self):
         self.labels = []
 
+    def __repr__(self):
+        return f"<GiftiLabelTable {self.labels!r}>"
+
     def get_labels_as_dict(self):
         self.labels_as_dict = {}
         for ele in self.labels:
@@ -153,6 +156,13 @@ def __init__(self, key=0, red=None, green=None, blue=None, alpha=None):
         self.blue = blue
         self.alpha = alpha
 
+    def __repr__(self):
+        chars = 255 * np.array(
+            [self.red or 0, self.green or 0, self.blue or 0, self.alpha or 0]
+        )
+        r, g, b, a = chars.astype('u1')
+        return f'<GiftiLabel {self.key}="#{r:02x}{g:02x}{b:02x}{a:02x}">'
+
     @deprecate_with_version(
         'get_rgba method deprecated. '
         "Use the rgba property instead.",
@@ -235,6 +245,11 @@ def __init__(self, dataspace=0, xformspace=0, xform=None):
         else:
             self.xform = xform
 
+    def __repr__(self):
+        src = xform_codes.label[self.dataspace]
+        dst = xform_codes.label[self.xformspace]
+        return f"<GiftiCoordSystem {src}-to-{dst}>"
+
     def _to_xml_element(self):
         coord_xform = xml.Element('CoordinateSystemTransformMatrix')
         if self.xform is not None:
@@ -375,6 +390,9 @@ def __init__(self,
         self.ext_offset = ext_offset
         self.dims = [] if self.data is None else list(self.data.shape)
 
+    def __repr__(self):
+        return f"<GiftiDataArray {intent_codes.label[self.intent]}{self.dims}>"
+
     @property
     def num_dim(self):
         return len(self.dims)