A frame for python tkinter with vertical and horizontal scrollbars that behaves like a normal Frame. Tested with python 2 and 3 on linux.

DoubleScrolledFrame.py

try:
    import tkinter as tk
    from tkinter import ttk
except ImportError:
    import Tkinter as tk
    import ttk

class DoubleScrolledFrame:
    """
    A vertically scrolled Frame that can be treated like any other Frame
    ie it needs a master and layout and it can be a master.
    keyword arguments are passed to the underlying Frame
    except the keyword arguments 'width' and 'height', which
    are passed to the underlying Canvas
    note that a widget layed out in this frame will have Canvas as self.master,
    if you subclass this there is no built in way for the children to access it.
    You need to provide the controller separately.
    """
    def __init__(self, master, **kwargs):
        width = kwargs.pop('width', None)
        height = kwargs.pop('height', None)
        self.outer = tk.Frame(master, **kwargs)

        self.vsb = ttk.Scrollbar(self.outer, orient=tk.VERTICAL)
        self.vsb.grid(row=0, column=1, sticky='ns')
        self.hsb = ttk.Scrollbar(self.outer, orient=tk.HORIZONTAL)
        self.hsb.grid(row=1, column=0, sticky='ew')
        self.canvas = tk.Canvas(self.outer, highlightthickness=0, width=width, height=height)
        self.canvas.grid(row=0, column=0, sticky='nsew')
        self.outer.rowconfigure(0, weight=1)
        self.outer.columnconfigure(0, weight=1)
        self.canvas['yscrollcommand'] = self.vsb.set
        self.canvas['xscrollcommand'] = self.hsb.set
        # mouse scroll does not seem to work with just "bind"; You have
        # to use "bind_all". Therefore to use multiple windows you have
        # to bind_all in the current widget
        self.canvas.bind("<Enter>", self._bind_mouse)
        self.canvas.bind("<Leave>", self._unbind_mouse)
        self.vsb['command'] = self.canvas.yview
        self.hsb['command'] = self.canvas.xview

        self.inner = tk.Frame(self.canvas)
        # pack the inner Frame into the Canvas with the topleft corner 4 pixels offset
        self.canvas.create_window(4, 4, window=self.inner, anchor='nw')
        self.inner.bind("<Configure>", self._on_frame_configure)

        self.outer_attr = set(dir(tk.Widget))

    def __getattr__(self, item):
        if item in self.outer_attr:
            # geometry attributes etc (eg pack, destroy, tkraise) are passed on to self.outer
            return getattr(self.outer, item)
        else:
            # all other attributes (_w, children, etc) are passed to self.inner
            return getattr(self.inner, item)

    def _on_frame_configure(self, event=None):
        x1, y1, x2, y2 = self.canvas.bbox("all")
        height = self.canvas.winfo_height()
        width = self.canvas.winfo_width()
        self.canvas.config(scrollregion = (0,0, max(x2, width), max(y2, height)))

    def _bind_mouse(self, event=None):
        self.canvas.bind_all("<4>", self._on_mousewheel)
        self.canvas.bind_all("<5>", self._on_mousewheel)
        self.canvas.bind_all("<MouseWheel>", self._on_mousewheel)

    def _unbind_mouse(self, event=None):
        self.canvas.unbind_all("<4>")
        self.canvas.unbind_all("<5>")
        self.canvas.unbind_all("<MouseWheel>")
        
    def _on_mousewheel(self, event):
        """Linux uses event.num; Windows / Mac uses event.delta"""
        func = self.canvas.xview_scroll if event.state & 1 else self.canvas.yview_scroll 
        if event.num == 4 or event.delta > 0:
            func(-1, "units" )
        elif event.num == 5 or event.delta < 0:
            func(1, "units" )
    
    def __str__(self):
        return str(self.outer)

#  **** SCROLL BAR TEST *****
alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
if __name__ == "__main__":
    root = tk.Tk()
    root.title("Scrollbar Test")
    root.geometry('400x500')
    lbl = tk.Label(root, text="Hold shift while using the scroll wheel to scroll horizontally")
    lbl.pack()
    
    # use the Scrolled Frame just like any other Frame
    frame = DoubleScrolledFrame(root, width=300, borderwidth=2, relief=tk.SUNKEN, background="light gray")
    #frame.grid(column=0, row=0, sticky='nsew') # fixed size
    frame.pack(fill=tk.BOTH, expand=True) # fill window

    for i in range(30):
        for j in range(20):
            label = tk.Label(frame, text="{}{}".format(alphabet[j], i), relief='ridge')
            label.grid(column=j, row=i, sticky='ew', padx=2, pady=2)

    root.mainloop()

Thanks, this helped a lot.
But I couldn't get winfo_children() on the frame to return the widgets I've added to the frame, instead it seems to return the canvas and scrollbars. But I solved by including an extra function:

def get_children(self):
        return self.inner.winfo_children()

Would you please add a license to this gist? Perhaps MIT, BSD, or ISC? I'd love to incorporate it into a program I'm writing, but don't want to run afoul of copyright.

Thanks a lot

This helped a lot! Thanks:)