Update.

pyltk/element.py

@@ -7,7 +7,15 @@ from collections import Iterable
 
 class element:
 
-    """ Class representing a latex element. """
+    """ Class representing a latex element.
+
+    An element is a latex element (e.g. \\figure), with a parent and some
+    childrens. An element can have no parent and 0 childrens.
+
+    By default, all childrens of an element must be instances of element
+    themselves. To avoid this behavior, `raw` element can be used. `raw`
+    elements do not wrap their children in `wrapper_element` when they
+    are no subclasses of `element`. """
 
     # Joiner for childrens
     sep = '\n'
@@ -15,8 +23,20 @@ class element:
     # Automatically add label after element if present
     autolabel = True
 
-    def __init__(self, parent=None, childrens=[], label=None):
+    # Do not wrap non-element in wrapper_element
+    raw = False
+
+    def __init__(self, parent=None, childrens=[], label=None, raw=False):
+        """ Create a new element with given parameters.
+
+        Parameters:
+          - parent Parent of the element (another element).
+          - childrens Childrens of the element - Single element or list of
+            objects (element or not).
+          - label Label of the element.
+          - raw Raw childrens (see description of `element`). """
         self.parent = parent
+        self.raw = raw
         if childrens is None:
             childrens = []
         if not isinstance(childrens, Iterable):
@@ -29,6 +49,7 @@ class element:
         if not isinstance(childrens, Iterable):
             childrens = [childrens]
         for child in childrens:
+            if not self.raw:
                 if not isinstance(child, element):
                     child = wrapper_element(child, self)
                 try:

pyltk/table.py

@@ -3,6 +3,9 @@
 from .element import element
 from .tabular import tabular
 
+import itertools
+import pandas as pd
+
 
 class table(element):
     """ Class representing a latex figure. """
@@ -47,14 +50,43 @@ class table(element):
         })
 
 
+def multicolumn(n, s=''):
+    if n == 1:
+        return s
+    return '\\multicolumn{' + str(n) + '}{c}{' + s + '}'
+
+
 class tabledf(table):
 
-    def __init__(self, df, header=None, **kargs):
+    def __init__(self, df, header=None, multilevels=False, fmt=None, **kargs):
         super().__init__(**kargs)
         if header is None:
-            header = df.columns
+            header = self.create_header(df)
-        tab = tabular(columns='r' * len(header))
+            multilevels = True
+            df = df.reset_index()
+        if multilevels:
+            ncols = len(header[-1])
+        else:
+            ncols = len(header)
+        tab = tabular(columns='r' * ncols)
+        if multilevels:
+            tab.addrows(header)
+        else:
             tab.addrow(header)
         tab.addhline()
-        tab.addrows(df.as_matrix())
+        tab.addrows(df.as_matrix(), fmt=fmt)
         self.add(tab)
+
+    def create_header(self, df):
+        cols = df.columns
+        if not isinstance(cols, pd.MultiIndex):
+            return df.columns
+        idx = df.index.names
+        header = []
+        for levels, labels in zip(cols.levels, cols.labels):
+            tmp = [multicolumn(len(idx))]
+            for i, g in itertools.groupby(labels):
+                tmp.append(multicolumn(len(list(g)), levels[i]))
+            header.append(tmp)
+        header[-1] = idx + header[-1][1:]  # Update last row
+        return header

pyltk/tabular.py

@@ -8,17 +8,23 @@ class row_element(element):
     """ Class representing a row of a tabular element. """
 
     def __init__(self, columns, parent, label=None,
-                 wrapper=False, endline=False):
+                 wrapper=False, endline=False, fmt=None):
-        super().__init__(parent, columns, label=label)
+        super().__init__(parent, columns, label=label, raw=(fmt is not None))
         self.wrapper = wrapper
         self.endline = endline
+        self.__fmt = fmt
+        if self.__fmt:
+            self.raw = True
 
     def content(self):
-        wp = str
+        row = self.childrens
+        if self.__fmt:
+            row = map(self.__fmt, self.childrens)
         if self.wrapper:
             cw = 1/len(self.childrens)
-            wp = lambda c: str(self.wrapper(c, width=cw))
+            wp = lambda c: self.wrapper(c, width=cw)
-        out = ' & '.join(map(wp, self.childrens))
+            row = map(wp, row)
+        out = ' & '.join(map(str, row))
         if self.endline:
             out += '\\\\'
         return out
@@ -63,7 +69,7 @@ class tabular(element):
         """ Add a hline to the current tabular element. """
         self.addrow(hline_element(self), False)
 
-    def addrow(self, row, wrap=None):
+    def addrow(self, row, wrap=None, fmt=None):
         """ Add a row to the tabular.
 
         Parameters:
@@ -71,21 +77,20 @@ class tabular(element):
           - wrap Can contains a wrapper element (typically a resizebox) for
             the cell of the row.
         """
-        if not isinstance(row, row_element):
-            row = row_element(row, parent=self)
         if wrap is None:
             wrap = self.autowrap
-        row.wrapper = wrap
+        if not isinstance(row, row_element):
+            row = row_element(row, fmt=fmt, wrapper=wrap, parent=self)
         if self.childrens:
             last = self.childrens[-1]
             if isinstance(last, row_element):
                 last.endline = True
         self.add(row)
 
-    def addrows(self, rows):
+    def addrows(self, rows, **kargs):
         """ Add multiple rows to the tabular (see addrow). """
         for row in rows:
-            self.addrow(row)
+            self.addrow(row, **kargs)
 
     def content(self):
         return self.fmt().format('content', {